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Brother HL-720, Service Manual

The Brother HL-720 is a reliable and high-performance printer designed to meet your everyday printing needs. Unlock the full potential of your device by accessing the comprehensive Service Manual, available for free download at 88.208.23.73:8080. Get instant access to this valuable resource and ensure smooth operation of your printer.

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CHAPTER 6 TROUBLESHOOTING

CHAPTER 6 –13

Question Recommendation
Toner scatters and stains the
printed page.

Fig. 6-10 Scattering Toner

If toner scatters over the whole printing surface, adjust
the print density dial inside the printer counter
clockwise. See 

“ADJUSTING THE PRINT

DENSITY”

 in Chapter 5.

Clean the printer interior. See “Cleaning the Printer
Interior and Drum Unit” in Chapter 5.

Make sure that you use paper that meets specifications.

If you still have the same problem and the Drum lamp
is on, replace the drum unit with a new one.

The whole page is printed in
black.

Fig. 6-11 Black Page

Wipe the electric terminals referring to

 “Cleaning the

Printer Interior and Drum Unit” 

in Chapter 5. Never

use heat-sensitive paper as it will cause this problem.

If the same problem occurs and the Drum lamp is still
on after cleaning, replace the drum unit with a new
one.

Nothing is printed on the page.

Fig. 6-12 White Page

• 

Make sure that the toner cartridge is not empty.

• 

Wipe the electric terminals referring to 

“Cleaning

the Printer Interior and Drum Unit”

 in Chapter 5.

• 

Make sure that a torn piece of paper does not
remain on the scanner window.

Printed pages are marked at
regular intervals.

Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over 

me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, 

over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together rightA 

now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come togetherA 

right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come AAA 

together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. A 

Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to beA 

free. Come together right now, over me.  Here come Flat-top ,he come. Lucy in the sky with Diamonde. AA 

One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,heAA 

come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top 

,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-

top ,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Lucy in the 

sky with Diamonde. Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come AAA 

together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. A 

Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be 

free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you goA 

to be free. Come together right now, over me.  Here come Flat-top ,he come. Lucy in the sky with AAAAA 

Diamonde. One thing I can tell you is you go to be free. Come together right now, over me.  Here come  A 

Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over me.  HereA 

come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over me. A 

Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over 

me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, 

over me.  Here come Flat-top ,he come. Lucy in the sky with Diamonde. One thing I can tell you is you go 

to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you 

go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is 

you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell A 

you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can 

tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I 

can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One A 

thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. 

One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he A 

come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top 

,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-

top ,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come 

Flat-top ,he come. Lucy in the sky with Diamonde. One thing I can tell you is you go to be free. Come AAA 

Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over 

me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, 

over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together rightA 

now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come togetherA 

right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come AAA 

together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. A 

Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to beA 

free. Come together right now, over me.  Here come Flat-top ,he come. Lucy in the sky with Diamonde. AA 

One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,heAA 

come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top 

,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-

top ,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Lucy in the 

sky with Diamonde. Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come AAA 

together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. A 

Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you go to be 

free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you goA 

to be free. Come together right now, over me.  Here come Flat-top ,he come. Lucy in the sky with AAAAA 

Diamonde. One thing I can tell you is you go to be free. Come together right now, over me.  Here come  A 

Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over me.  HereA 

come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over me. A 

Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, over 

me.  Here come Flat-top ,he come. One thing I can tell you is you go to be free. Come together right now, 

over me.  Here come Flat-top ,he come. Lucy in the sky with Diamonde. One thing I can tell you is you go 

to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is you 

go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell you is 

you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can tell A 

you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I can 

tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One thing I 

can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. One A 

thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he come. 

One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top ,he A 

come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-top 

,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come Flat-

top ,he come. One thing I can tell you is you go to be free. Come together right now, over me.  Here come 

Flat-top ,he come. Lucy in the sky with Diamonde. One thing I can tell you is you go to be free. Come AAA 

Fig. 6-13 Example of Regular

Marking

The problem may disappear by itself. Try printing
multiple pages to clear this problem especially if the
printer has not been used for a long time.

If the surface of the drum has been scratched, replace
the drum unit with a new one.

If the problem does not disappear, it may be that the
drum has been marked or damaged due to excessive
exposure to light. In this case, replace the drum unit
with a new one.

Summary of Contents for HL-720

Page 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...

Page 2: ...n the United States and other countries and True Type is a trademark of Apple computer Inc Epson is a registered trademark and FX 80 and FX 850 are trademarks of Seiko Epson Corporation Hewlett Packard is a registered trademark and HP Laser Jet II IIP and IID are trademarks of Hewlett Packard Company IBM IBM PC and Proprinter are registered trademarks of International Business Machines Corporation...

Page 3: ...TROUBLESHOOTING Reference values and adjustments troubleshooting for image defects troubleshooting for malfunctions etc APPENDICES Connection diagrams PCB circuit diagrams Note There are each captions for HL 720 and HL 730 730Plus to divide this manual according to the contents You can fin the captions under the headings Please pay attention to them On the other hand the headings have no captions ...

Page 4: ...gram II 3 1 3 Main PCB II 5 1 3 1 CPU Core II 5 1 3 2 ASIC II 7 1 3 3 ROM II 13 1 3 4 DRAM II 13 1 3 5 Optional RAM II 15 1 3 6 Optional Serial I O II 16 1 3 7 EEPROM II 16 1 3 8 Reset Circuit II 17 1 3 9 CDCC I O II 18 1 3 10 Engine I O II 19 1 3 11 Paper Feed Motor Drive Circuit II 21 1 4 Panel Sensor PCB II 22 1 5 Power Supply II 23 2 MECHANICS II 24 2 1 Overview of printing mechanism II 24 2 2...

Page 5: ...3 11 Fan Motor III 10 3 12 Drive Unit III 10 3 13 Main Motor Assy and Motor Heat Sink III 11 3 14 Gears and Solenoid III 11 3 15 Tray Extension III 12 3 16 Paper Eject Tray Assy III 12 4 PACKING III 13 CHAPTER IV TROUBLESHOOTING IV 1 1 INTRODUCTION IV 1 1 1 Initial Check IV 1 1 2 Basic Procedure IV 2 2 IMAGE DEFECTS IV 3 2 1 Image Defect Examples IV 3 2 2 Troubleshooting Image Defects IV 4 3 TROUB...

Page 6: ...iii 7 Low Voltage Power Supply PCB Circuit Diagram 230V V 8 8 Low Voltage Power Supply PCB Circuit Diagram 115V V 9 9 High Voltage Power Supply PCB Circuit Diagram V 10 10 Serial No Descriptions V 11 ...

Page 7: ... applications and allows you to set various printer settings including toner saving mode custom paper size sleep mode settings gray scale adjustment resolution and so forth You can easily set these print options through the Printer Setup Menu within the Windows Control Panel Printer Status Monitor with Bi directional Parallel Interface The printer driver can monitor your printer s status using bi ...

Page 8: ... full page 600 dpi graphic and text data including large fonts with the printer s standard memory This printer has the following features 600 dpi Resolution and 6 ppm Printing Speed 600 dots per inch dpi with microfine toner and six pages per minute ppm printing speed A4 or Letter size paper User Friendly Operation for Windows The dedicated printer driver and TrueType compatible fonts for Microsof...

Page 9: ...tings of the printer such as fonts page setup emulations and so on This program also provides a status monitor program which is a Terminate and Stay Resident TSR program It can monitor the printer status while running in the background and report the current status or errors on your computer screen Popular Printer Emulation Support This printer supports three printer emulation modes HP LaserJet II...

Page 10: ...at 5 print coverage Developer Drum unit separated from toner cartridge HL 730 730Plus Print method Electrophotography by semiconductor laser beam scanning Resolution 600 dots inch under Brother Printing Solution for Windows 300 dots inch under DOS Apple Macintosh and other operating system Print speed 6 page minute when loading A4 or letter size paper from the multi purpose sheet feeder Warm up Ma...

Page 11: ...ong HP LaserJet IIP EPSON FX 850 and IBM Proprinter XL Printer driver WindowsTM 3 1 3 11 and Windows 95 driver supporting Brother Native Compression mode and bi directional capability Optional Macintosh QuickDraw driver Standard in some countries Interface Bi directional Centronics parallel interface RS 422A RS 232C serial interface is optionally available The serial interface is a standard in som...

Page 12: ...ay is closed and the Multi purpose sheet feeder is removed Weight Approx 6 5 kg 14 3 lb including the drum unit HL 730 730Plus Power source U S A and Canada AC 110 to 120 V 50 60Hz Europe and Australia AC 220 to 240 V 50Hz Power consumption Printing 150 W or less Standing by 35 W or less Sleep 7 W or less Noise Printing 48 dB A or less Standing by 35 dB A or less Temperature Operating 10 to 32 5 C...

Page 13: ...ng The manual paper loading takes priorityoffeedingandasinglesheetofpapercanbe fedinto the printer The applicable sizes and types of paper are the same as the multi purpose tray loading above in specification 3 5 Print Delivery 1 At the print delivery tray opened Tray capacity Maximum 100 sheets 75g m2 face down only 2 At the print delivery tray closed Tray capacity 1 sheet 75 g m2 face down only ...

Page 14: ...ns Types Name Tray feed Manual feed Normal paper cut sheet 60 to 157 g m 2 paper Labels Special paper cut sheet Envelopes Postcards Organizers 3 7 Effective Printing Area Printable area E A F C E B D F The effective printing area means the area within which the printing of all the data received without any omissions can be guaranteed ...

Page 15: ...mm 5 35 1 604 dots 201 5mm 7 93 2 380 dots 6 01mm 0 24 71 dots Organizer J size 69 85mm 2 75 825 dots 127 0mm 5 0 1 500 dots 56 2mm 2 21 663 dots 118 5mm 4 66 1 400 dots 6 35mm 0 25 75 dots Organizer K size 95 25mm 3 75 1 125 dots 171 45mm 6 75 2 025 dots 86 78mm 3 42 1 024 dots 163 0mm 6 42 1 925 dots Organizer L size 139 7mm 5 5 1 650 dots 215 9mm 8 5 2 550 dots 131 23mm 5 17 1 550 dots 207 43mm...

Page 16: ...S Food and Drug Administration implemented regulations for laser products on August 2 1976 These regulations apply to laser products manufactured from August 1 1976 Compliance is mandatory for products marketed in the United States The label shown below indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States The label for Japanese product...

Page 17: ... performance instructions for VBG 93 are valid 2 CAUTION In case of any trouble with the laser unit please replace the laser unit itself To prevent direct exposure to the laser beam do not try to open the enclosure of laser unit 3 Location of the Exit Opening of Laser Beam Fig 1 2 4 Location of Caution Label for Laser Product Fig 1 3 ...

Page 18: ...block Interface block External device Low voltage power supply block High voltage power supply block Engine control block Operation block Operation panel Laser scanner unit Transfer block Drum unit Developing block Cleaner block Drum Charging block Toner cartridge Image generation system Paper tray unit Erase lamp Manual feed Fixing unit Paper eject block Paper tray Paper feed system Drive block S...

Page 19: ...ntrol block Operation block Operation panel Control system Low voltage power supply block High voltage power supply block Laser scanner unit Drive block Stepping motor Drum unit Transfer block Developing block Drum Charging block Cleaner block External device External device Paper tray unit Paper tray Manual feed Fixing unit Paper eject block Paper feed system Image generation system Toner cartrid...

Page 20: ... DRAM 0 5 Mbytes Option RAM 1 5 Mbytes or 3 5 Mbytes EEPROM 128 x 8 bits DRAM Control Oscillator 12 27 MHz Program ROM 16 Kbytes Working S RAM 512 Bytes Timer CDCC Parallel I O DATA Extension FIFO EEPROM I O Engine Control I O To Panel sensor PCB To PC ASIC CPU Core Z80 BUS INT Motor Driver Fig 2 3 ...

Page 21: ... RAM 0 5 Mbytes Option RAM 1M or 1 5Mbytes Option Serial I O RS232C RS422A EEPROM 128 8 bits CPU Core MC68EC000 A S I C Oscillator 15 3MHz Address Decoder DRAM Control Timer FIFO DATA EXTENSION CDCC Parallel I O Soft Support EEPROM I O Engine Control I O Motor Driver To Panel Sensor PCB BUS INT To PC Fig 2 4 ...

Page 22: ...2 27 MHz This frequency is made by dividing the source clock of 24 54 MHz into two in the oscillator circuit The address bus is 16 bits and the data bus is 8 bits The total memory space is 64 Kbytes The CPU core access directly only the program ROM and the working S RAM and the DRAM through the DRAM control unit NOTE The ASIC has the functions above Fig 2 5 ...

Page 23: ... The CPU is a Motorola MC68EC000FN16 which is driven with a clock frequency of 15 3 MHz This clock frequency is made by dividing the source clock of 30 67 MHz intotwo Theaddressbusis23bitsof A1 to A23 and the data bus is 16 bits The total memory space is 16 Mbytes Fig 2 6 ...

Page 24: ... in this ASIC as a work RAM for the CPU core 4 DRAM control circuit This circuit generates the RAS CAS WE OE and MA signals for the DRAM and controls the refresh for the DRAM CAS before RAS self refreshing method The CPU core the CDCC parallel I O unit and the data extension unit access the DRAM through the DRAM bus controlled by the DRAM control unit 5 Interrupt control This circuit controls all ...

Page 25: ... the PC is latched in the data buffer at the rising edge of STROBE The pulse width of ACK differs according to the speed MODE as shown above BUSY goes LOW at the rising edge of ACK IEEE1284 support This supports the IEEE1284 data transfer with the following mode Nibble mode Byte mode 8 Data extension This circuit extents the compressed image data which are received from the PC and writes the bit m...

Page 26: ...II 9 11 Engine control I O This I O is used for the connection to the panel sensor PCB It controls the main motor solenoid sensors scanner etc ...

Page 27: ...RAM and controls refresh recessing CAS before RAS self refreshing method 4 Interrupt control Interrupt levels Priority High 7 NMI 6 FIFO 5 EXINT Option Serial I O 4 BD Timer 1 3 SCANINT 2 CDCC BOISE DATA EXTENTION Low 1 Timer 2 5 Timers The following timers are incorporated Timer 1 16 bit timer Timer 2 10 bit timer Timer 3 Watch dog timer 6 FIFO A 5 120 bit FIFO is incorporated Data for one raster...

Page 28: ...goes HIGH at the falling edge of STROBE The data 8 bits from the PC is latched in the data buffer at the rising edge of STROBE The pulse width of ACK differs according to the speed MODE as shown above BUSY goes LOW at the rising edge of ACK IEEE1284 support This supports the IEEE1284 data transfer with the following mode Nibble mode Byte mode 8 Data extension This circuit extents the compressed im...

Page 29: ...II 12 11 Engine control I O This I O is used for the connection to the panel sensor PCB It controls the main motor solenoid sensors etc Fig 2 8 ...

Page 30: ...re stored in the ROM A 42 pin IC socket is provided an 8 Mbits ROM 42 pin can be mounted to this socket normally but a 4 Mbits ROM 40 pin must be mounted to leave the 1st and 42nd pins of the socket opened Fig 2 9 1 3 4 DRAM HL 720 A 4M bit DRAM x8 bits is used as the RAM Fig 2 10 ...

Page 31: ...II 14 HL 730 730Plus A 4M bit DRAM x 16bits is used as the RAM Only one DRAM is installed in the 0 5 Mbyte model Fig 2 11 ...

Page 32: ...L 730 730Plus There are two types of optional RAMs the 1 Mbyte model and the 1 5 Mbytes model for HL 730 and one type of optional RAM the 1Mbyte model for HL 730Plus The memory capacity can be expanded up to 2 Mbytes for both HL 730 and HL 730Plus HL 730 0 5 M model 1 M optional RAM 1 5 Mbytes 1 5 M optional RAM 2 Mbytes HL 730Plus 1 M model 1 M optional RAM 2 Mbytes Fig 2 13 ...

Page 33: ...ized by the CPU A 32 byte space for register is provided for this I O which are read and written to by the CPU Fig 2 14 1 3 7 EEPROM HL 720 The EEPROM is XL24C01AF type of a two wire method with a 128 x 8 bits configuration Fig 2 15 HL 730 730Plus The EEPROM is XL24C01AF type of a two wire method with a 128 x 8 bits configuration Fig 2 16 ...

Page 34: ...720 The reset IC is PST591DMT The reset voltage is 4 2V typ and the LOW period of reset is 50 ms typ Fig 2 17 HL 730 730Plus The reset IC is PST593DMT The reset voltage is 4 2V typ and the LOW period of reset is 200 ms typ Fig 2 18 ...

Page 35: ...II 18 1 3 9 CDCC I O HL 720 Fig 2 19 shows the CDCC interface circuit Fig 2 19 HL 730 730Plus Fig 2 20 shows the CDCC interface circuit Fig 2 20 ...

Page 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...

Page 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...

Page 38: ...HL 720 The motor driver consists of a TR array The excitation method is 2 2 phase excitation with an bipolar drive Fig 2 23 HL 730 730Plus The motor driver is a TR array The excitation method is 2 2 phase excitation with an bipolar drive Fig 2 24 ...

Page 39: ...el Sensor PCB The following parts are on the panel sensor Operation Panel 1Key 4LEDs Connector Low voltage high voltage solenoid main motor toner sensor laser polygon motor connector for main PCB Registration sensor ...

Page 40: ... to generate the regulated DC power 5V and 24V which are converted from the AC line Heater Circuit Thermal Fuse Lightning Surge Absorber Feedback Line Filter Fuse Rectifier Oscillator 24V Regulation Circuit 5V Regulation Circuit 24V 5V Lamp Heater Panel Sensor Circuit Fig 2 25 ...

Page 41: ...eloper Roller Transfer Roller Paper Eject Sensor Thermistor Toner Empty Sensor Multi Purpose Sheet Feeder Manual Paper Pass Paper Supply Unit Paper Pick up Roller Paper Feed Roller Drum Unit Pitch Roller Auger Blade Transfer Roller Photosensitive Drum Erase Lamp Fuser Unit Pressure Roller Eject Sensor Actuator Eject Roller Heat Roller Cleaner Roller Developer Roller Primary Charger Supply Roller T...

Page 42: ...en paper picked up from the multi purpose paper tray MPT presses against the top of form sensor actuator the registration sensor lever is caused to turn and the photo sensor detects this motion With this signal from the sensor the paper feed roller is stopped of its rotation temporarily by the clutch Then paper is fed to the nip point between the paper feed roller and the pinch roller in the multi...

Page 43: ...terrupter is opened and detects the start of paper eject motion b After that when the bottom of the edge of paper has passed through the paper eject sensor actuator the photo sensor is closed and the completion of paper eject motion is recognized Fig 2 29 Pressure roller Eject sensor actuator Eject roller Heat roller Drum Transfer roller High voltage power supply PCB Sensor Eject sensor actuator P...

Page 44: ... open or close of the top cover 2 3 2 Toner Empty Sensor Detects if there is toner in the toner cartridge It also detects whether or not the drum unit is installed The toner cartridge is installed in the drum unit Fig 2 30 Top Cover Cover Switch ...

Page 45: ...ocess 2 5 1 Charging The drum is charged to approx 1000V by ion which is generated by the primary charger Ion is generated by an ionization of the corona wire which applied DC bias from High voltage Power Supply The flow of ion is controlled by the grid to be distributed evenly on the drum surface The other end of the grid is generated to approx 280V by the voltage regulator Fig 2 31 The primary c...

Page 46: ...s recreated forming an electrostatic image to be printed 1 Cycle of drum Surface Potential V 1000 700 400 300 1 2 3 4 a b Time 1 2 3 4 Primary charging Laser beam exposure and developing a Unexposed area Non image area b Exposed area Image area Transfer the image to paper Erase the residual potential Drum Sleeve Fig 2 33 Laser Beam Drum Paper Laser beam f lens Polygon mirror Motor Lens Laser diode...

Page 47: ...the developer roller to the drum Fig 2 34 2 5 4 Transfer a Transfer process After the drum has been charged and exposed and has received a developed image the toner formed image is transferred onto the paper applying the negative charge from the backside of the paper The negative charge to the paper causes the positive charged toner to leave the drum and adhere to the paper As a result the image i...

Page 48: ...moved away and collected in the cleaning roller itself The residual toner in the cleaning roller will be discharged to the drum when starting or unprinting the toner will be collected by a developing roller and reused for further developing 2 5 6 Erasing Stage Before the cleaning stage the drum surface is exposed by the light emitted from the erase lamp LED lamp This stage prepares the drum to dec...

Page 49: ...portion of the equipment to discharge the static electricity charged in your body or the electronic parts or components may be damaged 6 When transporting PCBs be sure to wrap them in conductive sheet such as aluminum foil 7 Be sure to replace self tapping screws correctly if removed Unless otherwise specified tighten screws to the following torque values TAPTITE BIND or CUP B M3 6kgf cm M4 9kgf c...

Page 50: ...AY EXTENSION PAPER EJECT TRAY ASSY MAIN PCB ASSY BASE PLATE ASSY PANEL SENSOR PCB ASSY LOW VOLTAGE PS PCB ASSY B B C C A A 1 2 3 4 5 6 7 8 15 DRIVE UNIT 12 MAIN MOTOR ASSY and MOTOR HEAT SINK 13 GEARS and SOLENOID 14 10 FAN MOTOR 11 9 BOTTOM 16 HIGH VOLTAGE PS PCB ASSY ...

Page 51: ... cover 2 Lift out the drum unit Fig 3 1 3 2 Top Cover 1 Open the top cover to the first lock position 2 Prize up the top cover link and free it from the dowel on the top cover to release it inward 3 Press the link downward Fig 3 2 ...

Page 52: ...g 3 3 3 3 Multi purpose Paper Tray Assy 1 Tilt the left outward and pull out the MP tray It is not necessary to tilt the right rib Fig 3 4 NOTE When reassembling apply a suitable amount of grease 2 rice grain size between the heat sink of the motor and the ground leaf spring in case of grease shortage ...

Page 53: ...unit 2 Lifting up the fixing unit disconnect the two heater harnesses and remove the connector of thermistor on EL PCB Fig 3 5 3 Remove the two M3x10 screws 4 Open the fixing unit cover along the open side of the fixing unit cover Fig 3 5a 0 1 2 3 4 1 PR98292 2 35 ...

Page 54: ...ch roller Fig 3 5b 7 Remove the M3x10 screw securing the electrode plate to remove the electrode plate from the fixing unit frame 8 Loosen the other M3x10 screw securing the fixing unit cover 9 Remove the heat roller Then remove the halogen heater lamp from the heat roller Caution Never touch the surface of the halogen heater lamp and the heat roller Fig 3 5c 6 1 1 6 1 4 35 35 35572 557 ...

Page 55: ... sensor PCB from the Scanner unit Fig 3 6 NOTE Never touch the inside of the scanner unit or the mirror when disassembling or reassembling If there is any garbage or dust on the mirror blow it off 3 6 Main PCB Assy 1 Remove three screws securing the main PCB holder on the back side of the printer 2 Grasp the hooks at left and right and draw out the main PCB assy Fig 3 7 1 8 4 4 1 1 1 132 1 2 1 4 ...

Page 56: ...crews 3 Lift out the base plate assy and remove the grounding screw Fig 3 8 3 8 Panel sensor PCB Assy 1 Remove the screw securing the panel sensor PCB assy Remove the part A from under the main shield 2 Disconnect the seven connectors from the PCB The three connectors have already disconnected at the disassembling scanner unit See page III 5 Fig 3 9 1 1 9 4 7 1 7 1 1 4 1 0 4 4 4 4 4 4 ...

Page 57: ...er Supply PCB Assy 1 Remove the screw securing the low voltage power supply PCB assy 2 Disconnect the two connectors from the component side of the PCB Fig 3 10 3 10 High voltage Power Supply PCB Assy 1 Remove the screw securing the high voltage power supply PCB assy 2 Disconnect the four connectors from the PCB Fig 3 11 NOTE When reassembling the density volume must be fitted into the cut side of...

Page 58: ...Disconnect the connector from the high voltage power supply PCB It has been disconnected already See above 2 Take off the fan motor assy Fig 3 12 3 12 Drive Unit 1 Remove the four screws securing the drive unit Fig 3 13 ...

Page 59: ... motor assy 2 Remove the two screws securing the motor heat sink Fig 3 14 3 14 Gears and Solenoid 1 Apply grease the point as shown below Grease MOLYKOTE EM 30L TKC 0 MOLYKOTE EM D110 NOTE Apply EM 30L to the small gears 2 pcs inside Gear 45 arm assy Fig 3 15 9 335 58 58 5 5 3 8 5 1 4 ...

Page 60: ...he bottom of its both side legs outward to release it Fig 3 16 3 16 Paper Eject Tray Assy 1 Open the paper eject tray 2 Press the both sides of hinges of the paper eject tray inward to release it from the holes on the top cover 3 Press the tray extension toward the arrays and remove it Fig 3 17 1 6 ...

Page 61: ... Fig 3 18 2 4 1 1 1 ...

Page 62: ...er the print quality improves or not 3 Consumables Check if 1 The toner LED is not lit on the display when a toner cartridge is installed in the printer If the above LED is lit replace the cartridge with a new one If blank spots occur on prints take out the process cartridge and slowly rock it to distribute the toner evenly 4 Others Condensation When the printer is moved from a cold room into a wa...

Page 63: ...fore unsealing it This will take one to two hours 1 2 Basic Procedure If a malfunction or incorrect print is appeared make an initial check then follow the basic procedure below 1 Check the error lamps according to the procedure of inspection mode described on the later pages of this section If no error lamp is lit see Section 4 for troubleshooting 2 If any incorrect image is found follow the imag...

Page 64: ...i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o u t t e s t p r i n t o u t t e s t P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o u t t e s t p r i n t o u t t e s t P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o u t t e s t p r i n t o u t t e s t P r i n t o u t t e s t p r i n t o P r i n ...

Page 65: ...with electrode when the drum unit is installed No Clean contact electrodes between the printer body and the drum shaft of drum unit Transfer electrode contact failure 6 Is there continuity between the transfer roller shaft and the transfer electrode on the external drum unit Yes Remove the transfer roller and clean the contact electrode Clean the external electrode Transfer failure 7 Is the proble...

Page 66: ...e I 3 Completely blank Possible cause Step Check Result Remedy Developing bias contract failure 1 Are the developing bias contacts between the printer body and drum unit solid Yes Clean the electrodes at both sides Scanner harness connection failure 2 Is the scanner LD control harness connected normally Is there any play in the connection Yes Connect the connector correctly Main panel sensor PCB c...

Page 67: ... printer body side Yes Check the connection of the harness between the high voltage power supply and the panel sensor PCB Ditto 4 Perform the same check as in step 3 No Replace the panel sensor PCB I 4 All black Possible cause Step Check Result Remedy Soiled fixing unit 1 A Is the area of about 50mm from the top on the back of paper soiled Yes No failure on the fixing unit clean the transfer rolle...

Page 68: ...the corona wire cleaner failed to return to its home position Yes Return the wire cleaner or its home position Corona failure 4 Is the corona wire soiled Yes Clean the corona wire Scanner window 5 Is the scanner window dirt Yes Clean the scanner window with a soft dry cloth Scratch on the drum 6 Remove the transfer roller Is the surface of the drum scratched Yes Replace the drum unit Cleaning fail...

Page 69: ...re the horizontal streaks at 50 mm intervals Yes Replace the fixing unit I 8 Dropout Possible cause Step Check Result Remedy Transfer failure 1 Is the transfer roller soiled Is it scratched Yes Replace the drum unit High voltage power supply failure 2 Open the top cover and measure the voltage at the transfer electrode plate at the right side while printing with the interlocks defeated Is the volt...

Page 70: ...amount of paper loaded to the paper tray more than 22mm thick Yes Instruct the user to keep paper loads below 22mm in thickness Printer paper 2 Is the specified weight of the recommended paper being used No Instruct the user to use the recommended types of paper Ditto 3 Is the first printing position within 1mm of the tolerance specification Yes Adjust the Y offset by using the utility software su...

Page 71: ...inting is faint Yes Toner is empty As toner sensing is defective clean the toner sensor If the wiper of the toner cartridge id broken replace the toner cartridge with a new one Fixing unit nip failure 3 Is the nip width in the fixing unit insufficient Is the nip spring P R spring unconnected Yes Connect the spring or replace the fixing unit Thermistor failure 4 Measure the temperature of heat roll...

Page 72: ...t t e s t p r i n t o u t t e s t P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o u t t e s t p r i n t o u t t e s t P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o u t t e s t p r i n t o u t t e s t P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o P r i n t o u t t e s t p r i n t o u t t ...

Page 73: ...ors for contact failure before measuring the voltage at specified connector pins M 1 No AC power supplied Possible cause Step Check Result Remedy Supply voltage 1 Is the correct voltage present at the outlet No Inform the user that the correct voltage is not supplied at the outlet Power plug 2 Is the power cord securely plugged into the outlet No Plug the power cord securely into the outlet Fuse F...

Page 74: ...n If the protector circuit is activated check the connector the wiring from the connector and the DC load Power supply input unit 3 No Replace the power supply input unit after unplugging the power cord from the power outlet M 3 Main motor unrotated Possible cause Step Check Result Remedy Connection failure of connector 1 Is the connection of connector P5 on the panel sensor PCB correct No Reconne...

Page 75: ...failure 2 Check the connection of the harness between the high voltage power supply and the driver PCB is OK Yes Replace the high voltage power supply PCB No Reconnect the harness between the high voltage power supply and the driver PCB M 6 Fixing heater temperature not adjusted Possible cause Step Check Result Remedy Poor thermistor harness contact 1 Are the connectors on the erase lamp PCB and t...

Page 76: ...onnection failure 1 Is the connection of the scanner motor connector and connector P3 on the panel sensor PCB correct No Connect the connectors securely Power supply input 2 Is the voltage between pins 1 24 VDC and 2 GND of connector P3 on the panel sensor PCB measured 24 VDC No Check if 24 VDC is supplied between pins 1 24 VDC and 3 GND of connector P4 on the panel sensor PCB If not check the pow...

Page 77: ...les Possible cause Step Check Result Remedy Paper 1 Is the paper of a recommended type used No Instruct the user to use the recommended types of paper 2 Is the wrinkle problem solved if a new paper is used No Instruct the user how to store paper so that it does not absorb moisture Fixing unit entrance guide 3 Is the entrance guide soiled Yes Clean the entrance guide Fixing unit 4 Is the pressure r...

Page 78: ...n LEDs go ON in the order of DRUM ALARM READY DATA DRUM If you release the button a mode is selected The mode selected is indicated by the LED which is ON when you release the button The inspection modes are assigned to the respective LEDs as shown below HL 720 LED Type of inspection DRUM Factory inspection mode ALARM Continuous test print mode READY Not defined DATA Not defined HL 730 730Plus LED...

Page 79: ... follows 1 Open the top cover and remove the drum unit 2 Turn on the power of the printer while holding down the button DRUM LED goes ON 3 Lightly press the button again 4 Check if DRUM paper eject sensor and ALARM registration sensor go OFF after all the LEDs go ON If the paper eject sensor is ON at this point DRUM LED goes ON error If the registration sensor is ON at this point ALARM LED goes ON...

Page 80: ...specific combination of ONs indicates the type of the error Type of error DATA READY ALARM DRUM Fuser malfunction Laser BD malfunction Scanner Malfunction v ROM Error D RAM Error Service A Service B Service C Service D Service E0 Service E1 Service P NV RAM Error LED indicating the error Fuser Malfunction DRUM ALARM READY PAPER DATA TONER A lapse of time OFF ON ...

Page 81: ...RAM P2 MAIN PCB ENGINE I F P3 MAIN MOTOR M P5 REGIST P7 P4 P2 P6 P1 P3 P8 SOLENOID LEDs SW CLN GRID DEV HVPS P1 EJECT P3 P2 P4 T R DRUM GROUND PCB LASER TONER SCANNER MOTOR FAN ERASE LAMP THERMISTOR HEATER COVER SW AC INPUT CN101 CN1 POWER SWITCH LVPS PANEL SENSOR PCB V 1 MB 215 235 ...

Page 82: ...SERIAL I F CDCC I F P1 EXRAM P2 MAIN PCB ENGINE I F P3 MAIN MOTOR M P5 REGIST P7 P4 P2 P6 P1 P3 P8 SOLENOID LEDs SW CLN GRID DEV HVPS P1 EJECT P3 P2 P4 T R DRUM GROUND PCB LASER TONER SCANNER MOTOR FAN ERASE LAMP THERMISTOR HEATER COVER SW AC INPUT CN101 CN1 POWER SWITCH LVPS PANEL SENSOR PCB P4 x10 V 2 ...

Page 83: ...1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 A B C E F G H A B C D E F G H D Appendix 3 a Main PCB Circuit Diagram 1 2 HL 720 CODE NAME UK3595000 B48K224CIR V 3 ...

Page 84: ...1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 A B C E F G H A B C D E F G H D Appendix 3 b Main PCB Circuit Diagram 2 2 HL 720 CODE NAME UK3595000 B48K224CIR V 4 ...

Page 85: ...1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 A B C E F G H A B C D E F G H D Appendix 4 Main PCB Circuit Diagram 1 2 HL 730 730Plus CODE UK3596000 B48K233CIR 1 2 NAME V 5 ...

Page 86: ...1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 A B C E F G H A B C D E F G H D Appendix 5 Main PCB Circuit Diagram 2 2 HL 730 730Plus CODE UK3596000 B48K233CIR 2 2 NAME ...

Page 87: ... 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 A B C E F G H A B C D E F G H D UK3057000 B48K225CIR CODE NAME Appendix 6 Panel Sensor PCB Circuit Diagram HL 720 730 730Plus TI No 96 P062 V 7 ...

Page 88: ... B F1 Z1 Z2 C1 L1 L SW1 N NTC1 BEA1 D14 D12 D13 D11 C5 C22 R23 R2 R5 R9 C8 PC2 R22 TRA1 R20 R21 CN1 R101 D110 Q101 R106 PC1 R104 R105 VR101 R103 C110 R102 Q2 Q1 R18 R11 R13 C9 R8 C10 C13 PC1 R6 R10 C11 D7 R7 D4 D6 R17 T1 D104 D102 D101 C7 C15 IC101 R114 R113 R110 C103 C101 C102 PC2 GND REM 5V 24V CN101 FG FG V 8 R115 5 4 1 2 3 ...

Page 89: ...5 4 1 2 3 F1 Z1 Z2 C1 L1 L SW1 N NTC1 BEA1 D14 D12 D13 D11 C5 C22 R23 R3 R2 R5 R9 C8 PC2 R22 TRA1 R20 R21 CN1 R101 D110 Q101 R106 PC1 R104 R105 VR101 R103 C110 R102 Q2 Q1 R18 R11 R13 C9 R8 C10 C13 PC1 R6 R10 C11 D7 R7 D4 D6 R17 T1 D104 D102 D101 C7 C15 IC101 R114 R113 R110 C103 C101 C102 R115 PC2 GND REM 5V 24V CN101 FG FG R1 V 9 ...

Page 90: ...6 D5 D2 C4 C2 R9 R6 R8 R3 C5 C3 C1 DB2 RB2 R13 R5 R11 R10 R2 CB1 CB2 B1 Q1 Q31 Q32 Q33 Q39 Q40 Q41 Q4 Q2 D102 D34 D101 R104 R105 R106 R44 R32 R42 Q201 R41 R40 R39 R107 R103 R102 R101 VR34 VR31 VR33 VR101 VR32 R37 R38 Q37 R35 R34 R36 R45 C101 C33 C34 C102 C35 C32 C31 Q38 Q34 Z201 C202 C201 R201 VR201 R202 R203 D202 D201 Q35 Q42 Q36 D32 Q101 R33 D58 D57 R58 R53 R57 R55 R65 IC1 R66 B52 D60 D61 Q55 B5...

Page 91: ...dge 6 D 3 0 0 0 0 A N 1 3 Drum unit on the drum unit 6 E B 0 0 0 0 0 1 4 Toner cartridge on the toner cartridge 6 3 3 1 0 2 8 E 0 5 N 1 9 Z 5 Scanner unit on the scanner unit 1 1 0 0 1 MONTH YEAR FACTORY ID NO SERIAL NO YEAR MONTH DATE SERIAL NO PRODUCED IN JAPAN LINE NO CHINA BPI Z CHINA BCAS J TONER TYPE YEAR MONTH ASSEMBLY SERIAL NO SERIAL NO DATE MONTH X OCT Y NOV Z DEC YEAR FILLING AMOUNT 9 9...

Page 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...

Page 93: ...n the United States and other countries and True Type is a trademark of Apple computer Inc Epson is a registered trademark and FX 80 and FX 850 are trademarks of Seiko Epson Corporation Hewlett Packard is a registered trademark and HP Laser Jet II IIP and IID are trademarks of Hewlett Packard Company IBM IBM PC and Proprinter are registered trademarks of International Business Machines Corporation...

Page 94: ...roubleshooting for image defects troubleshooting for malfunctions etc APPENDICES Connection diagrams PCB circuit diagrams Note This service manual ffor the HL 760 describes only the changesin each part of the HL 720 730 84U002BE0 service manual which was published previously Parts in common with those in the HL 720 730 service manual are omitted this is indicated in the Table of Contents When you ...

Page 95: ... ROM II 7 1 3 4 DRAM II 8 1 3 5 Optional RAM II 9 1 3 6 Optional Serial I O II 10 1 3 7 EEPROM II 10 1 3 8 Reset Circuit II 11 1 3 9 CDCC I O II 11 1 3 10Engine I O II 12 1 3 11Paper Feed Motor Drive Circuit II 13 1 4 Panel Sensor PCB Refer to HL 730 P II 22 1 5 Power Supply Refer to HL 730 P II 23 2 MECHANICS REFER TO HL 730 P II 24 2 1 Overview of printing mechanism Refer to HL 730 P II 24 2 2 P...

Page 96: ...t III 7 3 6 Main PCB Assy III 7 3 7 Base Plate Assy III 8 3 8 Panel sensor PCB Assy III 8 3 9 Low voltage Power Supply PCB Assy III 9 3 10 High voltage Power Supply PCB Assy III 9 3 11 Fan Motor III 10 3 12 Drive Unit III 10 3 13 Main Motor Assy and Motor Heat Sink III 11 3 14 Gears and Solenoid III 11 3 15 Tray Extension III 12 3 16 Paper Eject Tray Assy III 12 3 17 Core III 13 4 PACKING III 14 C...

Page 97: ...ain PCB Circuit Diagram 3 3 V 4 5 Panel Sensor PCB Circuit Diagram Refer to HL 730 P V 7 6 Low Voltage Power Supply PCB Circuit Diagram 230V V 5 7 Low Voltage Power Supply PCB Circuit Diagram 115V V 6 8 High Voltage Power Supply PCB Circuit Diagram Refer to HL 730 P V 10 9 Serial No Descriptions Refer to HL 730 P V 11 ...

Page 98: ...el Printer Status Monitor with Bi directional Parallel Interface The printer driver can monitor your printer s status using bi directional parallel communications The printer status monitor program can show the current status of your printer When printing an animated dialog box appears on your computer screen to show the current printing process If an error occurs a dialog box will appear to let y...

Page 99: ...port the current status or errors on your computer screen Popular Printer Emulation Support This printer supports three printer emulation modes HP LaserJet 5P Epson FX 850 and IBM Proprinter XL The printer also supports Auto emulation switching between HP and Epson or HP and IBM If you want to set the printer emulation you can do it by using the Remote Printer Console Program Optional Apple Macint...

Page 100: ...ridge when printing A4 or letter size paper at 5 print coverage Developer Drum unit separate from the toner cartridge 2 2 Functions CPU IDT79R3041 20J 20Mhz Emulation Automatic emulation selection among HP LaserJet 5P PCL Level 5e EPSON FX 850 and IBM Proprinter XL Printer driver Windows 95 Windows 3 1 driver supporting Brother Native Compression mode and bi directional capability Optional Macinto...

Page 101: ... or less Noise Printing 48 dB A or less Standing by 35 dB A or less Temperature Operating 10 to 32 5 C 59 to 90 5 F Storage 0 to 40 C 38 to 104 F Humidity Operating 20 to 80 without condensation Storage 20 to 80 without condensation Dimensions W x D x H 366 W x 383 D x 250 H when the output tray is closed and the Multi purpose sheet feeder is removed Weight Approx 7 0 kg 15 45 lb including the dru...

Page 102: ... Interface block Engine control block Operation block Operation panel Control system Low voltage power supply block High voltage power supply block Laser scanner unit Drive block Stepping motor Drum unit Transfer block Developing block Drum Charging block Cleaner block External device External device Paper tray unit Paper tray Manual feed Fixing unit Paper eject block Paper feed system Image gener...

Page 103: ...Mbytes RAM 1 0 Mbytes Option RAM SIMM max 32 Mbytes Option Serial I O RS232C RS422A EEPROM 512 x8 bits CPU Core R3041 A S I C Oscillator 4MHz Address Decoder DRAM Control Timer FIFO DATA EXTENSION CDCC Parallel I O Soft Support EEPROM I O Engine Control I O Motor Driver To Panel Sensor PCB BUS INT To PC Fig 2 2 ...

Page 104: ...CB The CPU is an IDT 79R3041 20J which is driven at a clock frequency of 20 MHz This clock frequency is made by dividing the source clock of 40 0 MHz into two The address and data bus are both 32 bit of AD0 to AD31 and D0 to D31 The total addressable memory space is 4 Gbytes Fig 2 3 ...

Page 105: ...E and MA signals for the DRAM and controls the memory refresh processing CAS before RAS self refreshing method 5 Interrupt control Interrupt levels Priority High 9 TIMER 3 Watch Dog 8 MONITOR 7 FIFO 6 EXINT 5 TIMER1 4 BD 3 Spare 2 CDCC BOISE DATA EXTENTION Low 1 TIMER 2 All the interrupts can be masked 6 Timers The following timers are included Timer 1 16 bit timer Timer 2 10 bit timer Timer 3 Wat...

Page 106: ...edge of STROBE The data 8 bits from the PC is latched in the data buffer at the rising edge of STROBE The pulse width of ACK differs according to the speed MODE as shown above BUSY goes LOW at the rising edge of ACK IEEE1284 support This supports the IEEE1284 data transfer with the following mode Nibble mode Byte mode ECP mode 9 Data extension This circuit extents the compressed image data which a...

Page 107: ...II 6 12 Engine control I O This I O is used for the connection to the panel sensor PCB It controls the main motor solenoid sensors etc Fig 2 4 ...

Page 108: ...1 3 3 ROM A program and font data are stored in the 4MBytes ROM ROM is composed by the two 16 Mbits masks and is mounted to the 42 pin IC socket And 16 Mbits Flash ROM Module can be mounted to it too Fig 2 5 ...

Page 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...

Page 110: ...II 9 1 3 5 Optional RAM As the option RAM 32 bit SIMM of 72 pin can be mounted SIMM has one slot and can deal with 1 MBytes to 32 MBytes Fig 2 7 ...

Page 111: ... to the EXINT terminal of the ASIC and are recognized by the CPU A 32 byte space for register is provided for this I O which are read and written to by the CPU Fig 2 8 1 3 7 EEPROM The EEPROM is X24C04F type of a two wire method with a 512 x 8 bits configuration Fig 2 9 ...

Page 112: ...II 11 1 3 8 Reset Circuit The reset IC is PST591DMT The reset voltage is 4 2V typ and the LOW period of reset is 50 ms typ Fig 2 10 1 3 9 CDCC I O Fig 2 11 shows the CDCC interface circuit Fig 2 11 ...

Page 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...

Page 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...

Page 115: ...l part of the equipment to discharge any static electricity charged in your body or else electronic parts or components may be damaged 6 When transporting PCBs be sure to wrap them in conductive sheet to prevent static damage 7 Be sure to replace self tapping screws correctly if removed during servicing Unless otherwise specified tighten screws to the following torque values TAPTITE BIND or CUP B ...

Page 116: ...ANNER UNIT TRAY EXTENSION PAPER EJECT TRAY ASSY MAIN PCB ASSY BASE PLATE ASSY PANEL SENSOR PCB ASSY LOW VOLTAGE PS PCB ASSY B B C C A A 1 2 3 4 5 6 7 8 15 DRIVE UNIT 12 MAIN MOTOR ASSY and MOTOR HEAT SINK 13 GEARS and SOLENOID 14 10 FAN MOTOR 11 9 BOTTOM 16 HIGH VOLTAGE PS PCB ASSY ...

Page 117: ... the drum unit Fig 3 1 3 2 Top Cover 1 Open the top cover to the first lock position 2 Prize up the top cover link and free it from the dowel on the top cover to release it inwards 3 Press the link downward Fig 3 2 Drum unit Top cover Top cover Dowel on top cover Top cover link ...

Page 118: ... MP tray It is not necessary to release the right rib Fig 3 4 NOTE When reassembling remove the old grease from the Motor heat sink and apply a suitable amount of new grease 2 rice grain size between the heat sink of the motor and the ground leaf spring Top cover Catches Bottom cover Sub cover Multi purpose paper tray Rib Grease FLOIL GE 676 or FLOIL GE 334C Motor heat sink 6 2 mm Left side Ground...

Page 119: ...istor cable from the connector on the EL PCB Fig 3 5 3 Remove the two M3x10 screws 4 Open the fixing unit cover along the open side of the fixing unit cover Fig 3 5a Fixing unit Heater harness Blue Thermistor harness White Heater harness Brown EL PCB Taptite M4x12 Fixing unit cover Shaft Fixing unit cover Pressure roller Fixing unit frame PR98292 Taptite M3x10 ...

Page 120: ...ctrode plate to remove the electrode plate from the fixing unit frame 8 Loosen the other M3x10 screw securing the fixing unit cover 9 Remove the heat roller Then remove the halogen heater lamp from the heat roller Caution Never touch the surface of the halogen heater lamp and the heat roller Fig 3 5c Eject Pinch Roller Paper eject roller shaft Pinch Spring Heat roller Taptite M3x10 Taptite M3x10 E...

Page 121: ... touch the inside of the scanner unit or the mirror when disassembling or reassembling If there is any dirt or dust on the mirror blow it off 3 6 Main PCB Assy 1 Remove the four screws securing the main PCB holder to the back of the printer 2 Grasp the hooks at the left and right ends of the PCB holder and draw out the main PCB assy Fig 3 7 I F Shield assy Hook Rail Main PCB assy Hook Mirror Screw...

Page 122: ... Slide the part A from under the main shield and lift the PCB assembly upwards 2 Disconnect the seven connectors from the PCB The three connectors P2 P3 and P9 have already disconnected when disassembling the scanner unit See page III 5 Fig 3 9 Panel sensor PCB assy A Main Shield Solenoid harness P6 HV flat cable P7 LV harness P4 M4 Screws B tight Main feed motor harness P5 M3 Screws S tight M4 Sc...

Page 123: ...ors from the component side of the PCB Fig 3 10 3 10 High voltage Power Supply PCB Assy 1 Remove the screw securing the high voltage power supply PCB assy and lift the PCB 2 Disconnect the four connectors from the PCB Fig 3 11 NOTE When reassembling the density volume adjuster knob must be fitted into the cutout side of the density dial Insulation sheet High voltage power supply PCB assy Drum grou...

Page 124: ... connector from the high voltage power supply PCB It should have been disconnected already see above 2 Lift out the fan motor assy Fig 3 12 3 12 Drive Unit 1 Remove the four screws securing the drive unit Fig 3 13 Drive unit Fan motor assy ...

Page 125: ...elow Grease MOLYKOTE EM 30L TKC 0 MOLYKOTE EM D110 NOTE Apply EM 30L to the small gears 2 pcs inside the Gear 45 arm assy Fig 3 15 Apply grease to these points after assembling EM D110 Motor heat sink Gear 40 Inside cog 54 Main motor assy Gear 45 arm assy Gear for 20 Connection gear 30 Gear 14 47 Lever return spring Grease EM 30L Paper pick up solenoid lever Solenoid Clutch holder spring Clutch re...

Page 126: ...g 3 16 3 16 Paper Eject Tray Assy 1 Open the paper eject tray 2 Press both sides of the hinges of the paper eject tray inwards to release it from the holes in the top cover 3 Press the tray extension inwards as shown by the arrows and remove it Fig 3 17 Tray extension Manual paper tray Multi purpose paper tray assy Top cover Paper eject tray assy Tray extension ...

Page 127: ...he ferrite core secured to the LD harness Fig 3 18 2 Carefully cut the tywrap to remove the core secured to the body bottom And then remove the motor harness the solenoid harness and the drum ground PCB assy harness which all pass through the core Fig 3 19 Ferrite core Flat cable LD harness Cut line Tywrap Core TFC Tywrap Motor harness Solenoid Drum ground PCB assy ...

Page 128: ...III 14 4 PACKING Fig 3 20 NO RTN form Insertion DC Dust cover Carton SF assy Documents Drum Toner box assy Pad Sheet Bag Pad Carton ...

Page 129: ...o turn ON in the order DRUM ALARM READY DATA DRUM When you release the button a mode is selected The mode selected is indicated by the LED which is ON when you release the button The inspection modes are assigned to the respective LEDs as shown below LED Type of inspection DRUM Factory inspection mode ALARM Continuous grid pattern print mode READY 3 patterns print mode grid horizontal lines and bl...

Page 130: ...remove the drum unit 2 Turn on the power to the printer while holding down the button The DRUM LED comes ON 3 Release the button and immediately lightly press the button again 4 Check if the DRUM paper eject sensor and ALARM registration sensor LEDs go OFF after all the LEDs go ON If the paper eject sensor is ON at this point and the DRUM LED goes ON error If the registration sensor is ON at this ...

Page 131: ... DATA READY ALARM DRUM Fuser Malfunction Laser BD Malfunction Scanner Malfunction ROM Error D RAM Error Service A Service B NV RAM Error CPU Runtime Error Refer to the further description of those errors as follows Service A Address Error Service B Bus Error CPU Runtime Error Other CPU errors such as Illegal Instruction or Operation Overflow LED error indications FUSER MALFUNCTION DRUM ALARM READY...

Page 132: ...SIMM MAIN PCB ENGINE I F P2 MAIN MOTOR M P5 REGIST P7 P4 P2 P6 P1 P9 P3 P8 SOLENOID LEDs SW CLN GRID DEV HVPS P1 EJECT P3 P2 P4 T R DRUM GROUND PCB LASER TONER SCANNER MOTOR FAN ERASE LAMP THERMISTOR HEATER COVER SW AC INPUT CN101 CN1 POWER SWITCH LVPS PANEL SENSOR PCB P4 x10 V 1 ...

Page 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...

Page 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...

Page 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...

Page 136: ...5 C22 R23 R3 R2 R5 R9 C8 PC2 R22 TRA1 R20 R21 CN1 R101 D110 IC301 Q101 Q301 Q202 R106 PC1 R104 R105 VR101 VR301 R103 C110 R102 Q2 Q1 R18 R11 R13 C9 R8 C10 C13 PC1 R6 R10 C11 D7 R7 D4 D6 R17 T1 Q201 D101 C102 C7 C15 R110 C310 C202 R203 C203 R206 R204 R310 R312 R311 R314 T201 D202 C201 R208 R313 C301 R207 D201 C101 D104 PC2 REM GND 24V GND 5V CN101 FG FG V 5 R201 R1 ...

Page 137: ...11 C5 C22 R23 R2 R5 R9 C8 PC2 R22 TRA1 R20 R21 CN2 R101 D110 IC301 Q101 Q301 Q202 R106 PC1 R104 R105 VR101 VR301 R103 C110 R102 Q2 Q1 R18 R11 R13 C9 R8 C10 C13 PC1 R6 R10 C11 D7 R7 D4 D6 R17 T1 Q201 D101 C102 C7 R110 C310 C202 R203 C203 R206 R204 R310 R312 R311 R314 T201 D202 C201 R208 R313 C301 R207 D201 C101 D104 PC2 REM GND 24V GND 5V CN101 FG FG V 6 R201 ...

Page 138: ...I Please read this manual thoroughly before using the printer Brother Laser Printer HL 700 Series User s Guide Keep this manual in a convenient place for quick and easy reference at all times ...

Page 139: ...ed with the carrier Warning When shipping the Printer the DRUM UNIT assembly including the TONER CARTRIDGE must be removed from the Printer and placed in the plastic bag Failure to remove and place it in the plastic bag during shipping will cause severe damage to the Printer and will VOID THE WARRANTY 1 Remove the drum unit 2 Place it in the plastic bag and seal the bag completely 3 Re pack the pr...

Page 140: ...d a four digit number for your password Our BBS supports modem speeds up to 14 400 8 bits no parity 1 stop bit Fax Back System For USA only Brother Customer Service has installed an easy to use Fax Back System so you can get instant answers to common technical questions and product information for all Brother products This is available 24 hours a day 7 days a week You can use the system to send th...

Page 141: ... is a registered trademark of Microsoft Corporation in the U S and other countries All other brand and product names mentioned in this User s Guide are registered trademarks of their respective companies Compilation and Publication Notice Under the supervision of Brother Industries Ltd this manual has been compiled and published covering the latest product s descriptions and specifications The con...

Page 142: ...ips to remember when using the printer To Use the Printer Safely Warning After you have just used the printer some internal parts of the printer are extremely hot When you open the top cover of the printer never touch the shaded parts shown in the following illustration High Temperature Inside the Printer Warning There are high voltage electrodes inside the printer Before cleaning the printer make...

Page 143: ...Loading Paper into the Feeder 2 5 Two Side Printing Manual Duplexing 2 7 MANUAL FEED SLOT 2 8 OUTPUT TRAY AND PAPER SUPPORT WIRE 2 10 CHAPTER 3 CONTROL PANEL 3 1 LAMPS AND SWITCH 3 1 Ready Paper Lamp 3 1 Data Toner Lamp 3 2 Drum Lamp 3 2 Alarm Lamp 3 2 Switch 3 3 Other Control Features 3 3 Sleep Mode 3 3 Test Print Mode 3 4 CHAPTER 4 OPTIONS 4 1 SERIAL INTERFACE BOARD RS100M For HL 730 730Plus ser...

Page 144: ...ls 6 4 PAPER JAMS 6 5 Q A 6 8 Setting Up the Printer Hardware 6 8 Setting Up the Printer for Windows 6 8 Setting Up the Printer for DOS For HL 730 730Plus series Only 6 9 Setting Up the Printer for Apple Macintosh Computers For HL 730 730Plus series Only 6 10 Paper Handling 6 10 Printing 6 11 Print Quality 6 12 APPENDIX A A 1 PRINTER SPECIFICATIONS A 1 Printing A 1 Functions A 2 Electrical and Mec...

Page 145: ...he equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Important A shielded interface cable should be used in order to ensure compliance with the limits for a Class B digital device Changes or modifications not expressly approved by Brother Industries Ltd co...

Page 146: ...odel Only U S Food and Drug Administration FDA has implemented regulations for laser products manufactured on and after August 2 1976 Compliance is mandatory for products marketed in the United States One of the following labels on the back of the printer indicates compliance with the FDA regulations and must be attached to laser products marketed in the United States MANUFACTURED Brother Corporat...

Page 147: ...ce of procedures other than those specified in this manual may result in hazardous radiation exposure The following caution label is attached near the scanner unit CAUTION INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCK DEFEATED AVOID DIRECT EXPOSURE TO BEAM CLASS 3B LASER PRODUCT ADVARSEL USYNLIG LASER STRÅLING NÅR KABINETLÅGET STÅR ÅBENT UNGDÅ DIREKTE UDSÆTTELSE FOR STRÅLING KLASSE 3B LASER VA...

Page 148: ...erly grounded through normal household wiring Extension cords used with the equipment must be three pin plug type and correctly wired to provide proper grounding Incorrectly wired extension cords may cause personal injury and equipment damage The fact that the equipment operates satisfactorily does not imply that the power is grounded and that the installation is completely safe For your safety if...

Page 149: ...r may not correspond with the markings which identify the terminals in your plug If you need to fit a different plug proceed as follows Remove a length of the cord outer sheath taking care not to damage the coloured insulation of the wires inside Cut each of the three wires to the appropriate length If the construction of the plug permits leave the green and yellow wire longer than the others so t...

Page 150: ...ensure proper connection with your computer It also contains information for installing the printer driver fonts and Remote Printer Console Program HL 730 730Plus series only 2 Read the User s Guide to get information about the following Features and operating environment requirements of your printer Chapter 1 Paper Handling Chapter 2 Control Panel Chapter 3 Options Chapter 4 Maintenance Chapter 5...

Page 151: ... RS 422A RS 232C Slide Switch and DIP Switches for Serial setting is optionally available Some models may have this option pre installed RS 422A RS 232C Serial Interface Port HL 730 730Plus series only Multi Purpose Sheet Feeder Control Panel Output Tray Extension Support Wire Paper Support Paper Guide Manual Feed Slot Top Cover Power Cord Parallel Interface Port Power Switch ...

Page 152: ...ocument complexity Versatile Paper Handling The printer has a multi purpose sheet feeder and straight paper path mechanism Using this mechanism you can load A4 letter legal B5 A5 and executive sizes of paper and various types of paper including envelopes postcards organizer paper and your custom paper size The multi purpose sheet feeder also allows manual paper loading so you can also use labels a...

Page 153: ...ching between HP and Epson or HP and IBM If you want to select the printer emulation you can do it using the Remote Printer Console Program Printer Status Monitor with Bi directional Parallel Interface The printer driver can monitor your printer s status using bi directional parallel communications A high quality bi directional parallel printer cable is recommended The printer status monitor progr...

Page 154: ...ing You can select from two economy modes 25 toner saving and 50 toner saving through the Windows printer driver supplied with your printer Sleep Mode Power Save Mode When the printer is not used for a certain amount of time sleep mode automatically reduces power consumption The printer consumes less than 7 W when in sleep mode Low Running Cost Since the toner cartridge is separate from the drum u...

Page 155: ...r Use a voltage regulator if the power source is not stable Environment The printer should be installed near a power outlet which is easily accessible Use the printer only within the following ranges of temperature and humidity Ambient temperature 10 C to 32 5 C 50 F to 90 5 F Ambient humidity 20 to 80 without condensation The printer should be used in a well ventilation room Place the printer on ...

Page 156: ...physical shocks or vibrations Do not expose the printer to open flames or salty or corrosive gasses Do not place objects on top of the printer Do not place the printer near an air conditioner Keep the printer horizontal when carrying Do not cover the slots in the top cover ...

Page 157: ...in Feeder Multi purpose Sheet Feeder Up to 22 mm 0 87 inch in height up to the mark Approx 200 sheets of 75 g m 2 20 lb or 50 sheets of 158 g m 2 42 lb A4 Letter paper or 10 envelopes Output Tray Approx 100 sheets of 75 g m 2 20 lb A4 Letter paper Cut Sheet Envelope Basis Weight 60 to 158 g m 2 16 to 42 lb 75 to 90 g m 2 20 to 24 lb single thickness Caliper 0 03 to 0 08 in 0 08 to 0 2 mm 0 0033 to...

Page 158: ...horized sales representative or the place of purchase of your printer We recommend you use label or transparencies which are designed for use in laser printers We recommend you use long grained paper for the best print quality If the paper has problems feeding from the multi purpose sheet feeder use the manual feed slot and try again You can use recycled paper in this printer Before using paper wi...

Page 159: ...dhesive closures Envelopes of baggy construction Envelopes not sharply creased Embossed envelopes Envelopes already printed by a laser printer Envelopes pre printed on the inside Envelopes that cannot be arranged uniformly when placed in a pile Fig 2 2 Envelopes Printable Area The figure below shows the physically printable area Except 9 x12 envelope Unprintable area Approximately 4 mm 0 16 inch f...

Page 160: ... does not support your custom paper size select the next paper size up that is closest but larger than the custom size Then adjust the print area by changing the right and left margins in your application software 2 Make sure that the multi purpose sheet feeder contains the selected size of paper in the selected orientation If necessary change the paper in the feeder 3 Send your file or document t...

Page 161: ...aution The feeder can hold up to 200 sheets of plain paper 75 g m 2 20 lb If you load too many sheets paper jams could occur Make sure that the paper is stacked below the mark If there is still some paper in the feeder you must first remove it put it together with the new paper and then insert the stack in the feeder Fig 2 4 Opening the Feeder and Loading Paper or Envelopes in the Feeder Note If y...

Page 162: ...uide and Closing the Feeder Note If the multi purpose sheet feeder runs out of paper when you try to print the Alarm and Paper lamps blink to alert you to a paper empty error You have to load paper in the feeder and push the panel switch to cancel the alarm and continue printing If paper jams in the printer the Alarm and Paper lamps also blink If the error is a paper jam clear it referring to PAPE...

Page 163: ...numbered sides of the paper the driver instructs you to re insert the paper by a pop up message on the computer screen Follow the instructions on how to reinsert the paper Note Before re inserting the sheets you have to straighten them or you will get paper errors The use of very thin or very thick paper is not recommended If you encounter a double feeding error we recommend that you hold all shee...

Page 164: ... the paper guide of the manual feed slot to the paper width you are using Fig 2 7 Moving the Paper Guide When you load more than one sheet of paper manually Open the Setup dialog box of the supplied Windows printer driver and choose Manual Feed in the Paper Source section Follow the above instructions to load the first page The printer automatically starts printing After the first page is printed ...

Page 165: ...CHAPTER 2 PAPER HANDLING CHAPTER 2 9 Note Insert paper firmly into the manual feed slot Be sure to load sheet by sheet when using the manual feed slot ...

Page 166: ... sheets can be stacked on the tray Follow these steps to open the output tray 1 Pull the top of the tray down 2 Extend the extension support wire Fig 2 8 Opening the Output Tray and Extending the Extension Support Wire You can stack up to 100 sheets in the output tray Caution When you use transparencies remove each sheet immediately after printing Stacking sheets may cause paper curled or paper ja...

Page 167: ... status of the printer Lamp Printer status Off The power switch is off or the printer is in sleep mode If the printer is in sleep mode it will wake up automatically when it receives data or you press the control panel switch Blinking The printer is warming up Blinking at 1 second intervals Blinking The printer is cooling down and stops printing until the printers internal temperature lower Blinkin...

Page 168: ...PLACING THE TONER CARTRIDGE in Chapter 5 and Operator Calls in Chapter 6 Drum Lamp The Drum lamp indicates the drum unit is nearly at the end of its life Lamp Printer status Off The drum unit can be used On The drum unit is nearly at the end of its life Installing a new drum unit turns off this lamp See REPLACING THE DRUM UNIT in Chapter 5 Alarm Lamp The Alarm lamp blinks to indicate a printer err...

Page 169: ...tain period of time time out it enters sleep mode Sleep mode acts as though the printer was turned off The default time out is 5 minutes While the printer is in sleep mode all the lamps are off and it is as if it was turned off but the printer can still receive data from the computer Receiving a print file or document automatically wakes up the printer to start printing Pressing the switch also wa...

Page 170: ... follows Lamp Lit Choice Function Drum Test sample page The printer prints a test sample page The printer returns to the ready status after printing Alarm Print Config Print Fonts I The printer prints the current configuration of the printer and a list of the internal fonts The printer returns to the ready status after printing HL 730 730Plus series only Ready Factory Reset The printer is restored...

Page 171: ... or dealer The serial interface for Apple Macintosh RS 422A will only print at 300 dpi The serial interface board is installed onto the main controller board inside the printer For the details about installation see the instruction guide which was provided with the serial interface board Selecting the RS 422A Apple or RS 232C IBM Serial Interface Note This section is only for printer models which ...

Page 172: ...ws Never change the RS 422A parameters for Apple Macintosh computers Because the RS 422A parameters have been correctly set at the factory for Apple Macintosh computers you do not need to change the settings You may skip this section If you change parameters for the RS 232C serial interface and you switch back to RS 422A for Apple Macintosh computers be sure to restore the parameters to the factor...

Page 173: ...5 6 7 8 Fig 4 2 Setting the Serial Interface Parameters Table 1 Serial Interface Parameters Settings Selector Parameters On up Off down 1 Baud Rate See Table 2 2 Baud Rate See Table 2 3 Data Length 7 bits 8 bits 4 Stop Bit 2 bits 1 bit 5 Parity See Table 3 6 Parity See Table 3 7 Protocol Xon Xoff DTR DTR only 8 Robust Xon On Off Table 2 Baud Rate Settings Selector 1 Selector 2 For RS 422A For RS 2...

Page 174: ... printer and computer Note Consult your dealer for a serial interface cable If you are a Macintosh user you can easily find the necessary cable at a local computer store Look for Apple serial cables labeled as Macintosh to ImageWriter II or Macintosh to Personal LaserWriter 300 or the Apple System Peripheral 8 Cable Do not purchase a serial cable labeled as Straight through or LocalTalk If you are...

Page 175: ...connect the serial interface cable as follows 1 Make sure that the power switch is turned off Caution Be sure to turn off the power switch before connecting or disconnecting the interface cables or the printer may be damaged 2 Insert and secure the parallel interface connector into the parallel interface port of your printer 3 Insert and secure the serial interface connector into the serial interf...

Page 176: ... 1 5 MB memory expansion The HL 730 series printer has 0 5 MB of memory as standard The memory capacity can be expanded up to 2 MB with an optional memory board Two sizes of memory boards are optionally available 1 MB memory expansion giving you a total of 1 5 MB or 1 5 MB memory expansion giving you a total of 2 MB Only one memory board can be installed so select your board carefully according to...

Page 177: ...hen you get the toner low warning Discard the used toner cartridge according to local regulations If you are not sure of them consult your local dealer Be sure to seal up the toner cartridge tightly so that toner powder does not spill out of the cartridge Do not discard used toner cartridges together with domestic rubbish It is recommended that you clean the printer when you replace the toner cart...

Page 178: ...ower switch 2 Close the output tray and open the top cover Remove the drum unit by holding each side of the drum and gently lifting the drum forwards towards you Note Make sure that the top cover is correctly latched open indicated by a click Fig 5 2 Removing the Drum Unit Note It is recommended to put the drum unit on a piece of disposable paper or cloth in case of accidental toner spill or scatt...

Page 179: ...f the printer never touch the shaded parts shown in the following illustration High Temperature Fig 5 3 Inside the Printer 3 Gently turn the lever on the toner cartridge forward until it stops Note The toner cartridge cannot be removed unless the shutter is completely closed by turning the lever fully to the front Fig 5 4 Turning the Lever to Close the Shutter ...

Page 180: ...ently shake it five or six times and then remove the protective part Caution Only unpack the toner cartridge immediately before installing it into the printer If toner cartridges are left unpacked for a long period of time the toner life is shortened You can only use a Brother genuine toner cartridge TN 200 series which is specially formulated to ensure top print quality Using another brand of ton...

Page 181: ...e drum unit and pushed fully home into the drum unit to ensure that the toner cartridge and the drum unit fit together correctly Fig 5 7 Installing the Toner Cartridge into the Drum Unit 7 Gently turn the lever on the toner cartridge backward until it stops Fig 5 8 Turning the Lever to Open the Shutter 8 Re install the drum unit into the printer and close the top cover Then turn on the power switc...

Page 182: ...r You should clean the printer when you replace the drum unit See CLEANING THE PRINTER in this chapter Note The drum unit is a consumable and it is necessary to replace it periodically There are many factors that determine the actual drum life such as temperature humidity type of paper and toner that you use the number of pages per print job etc The drum life is estimated at approximately 20 000 p...

Page 183: ...lustration High Temperature Fig 5 11 Inside the Printer 3 Remove the toner cartridge from the drum unit and keep it in a safe place For more information see REPLACING THE TONER CARTRIDGE in this chapter Note Discard the used drum unit according to local regulations If you are not sure of them consult your local dealer retailer Be sure to seal up the drum unit tightly so that toner powder does not ...

Page 184: ...ig 5 14 Do Not Remove the Starter Sheet Only unpack a drum unit immediately before installing it into the printer If an unpacked drum unit is subjected to excessive direct sunlight or room light the unit may be damaged Handle the toner cartridge and the drum unit carefully as it contains toner If toner scatters and your hands or clothes get dirty wipe or wash it off with cold water immediately Sta...

Page 185: ...ING THE TONER CARTRIDGE in this chapter 6 Install the new drum unit into the printer Fig 5 15 Installing the Drum Unit 7 Close the top cover 8 Turn on the power switch The printer can automatically ejects the starter sheet Ejecting this sheet resets the drum life alarm Fig 5 16 Ejecting the Starter Sheet Starter Sheet ...

Page 186: ...e causing darker or lighter printouts Use a screwdriver to turn the print density dial gently clockwise for darker printouts and counterclockwise for lighter printouts The dial has been factory set to the middle position Fig 5 17 Adjusting the Print Density Dial Warning After you have just used the printer some internal parts of the printer are extremely hot When you open the top cover of the prin...

Page 187: ... the printer Before cleaning the printer make sure to turn off the power switch and unplug the power cord from the power outlet Fig 5 19 Turning off the Switch and Unplugging 2 Remove the paper in the multi purpose sheet feeder 3 Use a damp cloth for cleaning Caution Use water or neutral detergents for cleaning Cleaning with volatile liquids such as thinners or benzene will damage the surface of t...

Page 188: ...make sure to turn off the power switch and unplug the power cord from the outlet Fig 5 20 Turning off the Switch and Unplugging 2 Open the top cover of the printer 3 Take the drum unit out of the printer and put it aside Warning After you have just used the printer some internal parts of the printer are extremely hot When you open the top cover of the printer never touch the shaded parts shown in ...

Page 189: ...the scanner window with cleaning alcohol isophorol 5 Turn the drum unit upside down carefully Caution Handle the drum unit carefully as it contains toner If toner scatters and your hands or cloths get dirty wipe or wash it off with cold water immediately Note It is recommended to put the drum unit on a piece of disposable paper or cloth in case of accidental toner spill or scatter Scanner Window ...

Page 190: ...ona Wire 7 Return the tab to the home position mark position before reinstalling drum unit Caution Be sure to position the tab at the home position or printed pages may have vertical stripes 8 Install the drum unit into the printer See the section REPLACING THE DRUM UNIT in Chapter 5 9 Close the top cover 10 Plug in the power cord and turn on the power switch Home Position ...

Page 191: ...w the steps below to re pack the printer or the printer may be damaged which will void the printer s warranty 1 Turn off the power switch and unplug the printer from the AC outlet 2 Open the top cover 3 Remove the drum unit assembly referring to the previous section Note Remove the drum unit assembly with the toner cartridge included Fig 5 24 Removing the Drum Unit Assembly ...

Page 192: ...put tray 6 Wrap the printer in the plastic bag and place it in the original carton box with the original Styrofoam packing material 7 Place any documents manual and any documentation describing the reason for repacking printer and drum unit assembly in the carton box as shown below 8 Close the carton box and tape it Fig 5 26 Repacking the Printer Drum Unit Including Toner Cartridge Carton Printer ...

Page 193: ...below Blinking Lamp Error Action Paper Alarm Paper jam Clear the paper jam referring to the next section PAPER JAMS and press the panel switch if the printer does not automatically resume printing Paper empty Load paper in the printer referring to Chapter 2 and press the panel switch Misfeed Reinstall the paper and press the panel switch Toner Alarm every 5 seconds Toner low Indicates that the pri...

Page 194: ... the printer Reduce the print resolution or reduce the complexity of your document Expand the printer memory with an optional memory board Parallel Interface Line Error Press the panel switch to resume printing Check that the connection between your computer and printer is secure and correct and check the interface cable Serial Interface Framing Error For HL 730 730Plus series Only Press the panel...

Page 195: ...ote If the printer does not operate as you expect it to it is recommended that you turn off the power switch wait a few seconds and then turn it on again If you still have problems consult your dealer or our authorized service representative ...

Page 196: ... Service Call Service D Service E0 Service E1 Service P Drum Alarm Ready Data Service Call NV RAM error Drum Alarm Ready Data ON OFF If you see any of these service call indications turn off the power switch wait a few seconds and then turn it on again and try to print again If you cannot clear the error and see the same service call indication after turning on the printer consult your dealer or o...

Page 197: ...ing descriptions If the jammed paper is removed completely and the top cover is closed the printer may resume printing automatically If the printer does not resume printing press the control panel switch Warning After you have just used the printer some internal parts of the printer are extremely hot When you open the top cover of the printer never touch the shaded parts shown in the following dia...

Page 198: ...tput Tray Paper Jam in the Multi Purpose Sheet Feeder If a paper jam has occurred inside the multi purpose sheet feeder open the multi purpose sheet feeder to pull the jammed paper upward out of the feeder then close the multi purpose sheet feeder Also open the top cover and check that a torn piece of paper does not remain inside the printer referring to the next section Fig 6 4 Paper Jam in the F...

Page 199: ... Then pull the jammed paper upwards and out of the printer Install the drum unit and close the top cover Fig 6 5 Paper Jam near the Drum Unit Paper Jam in the Fuser Unit If a paper jam has occurred in the fuser unit open the top cover and remove the drum unit Then pull the jammed paper out of the fuser Install the drum unit and close the top cover Fig 6 6 Paper Jam Inside the Printer ...

Page 200: ...perator Call section of this manual Check to see if the Ready lamp is blinking If the lamp is blinking fast the printer might be cooling down to lower the printers internal temperature Open the top cover of the printer to lower the temperature Setting Up the Printer for Windows Question Recommendation I cannot print from my application software Make sure the supplied Windows printer driver is inst...

Page 201: ...s emulation do not match Check in your application software which printer you have selected to make sure the printer is set up correctly Remember this printer emulates three widely used printer selections HP LaserJet IIP Epson FX 850 and IBM Proprinter XL Try setting the printer into HP emulation and then select the HP LaserJet IIP printer in your application software The printer does not print wh...

Page 202: ...er control panel If so the multi purpose sheet feeder may be out of paper or not properly installed If it is empty load a new stack of paper into the feeder If there is paper in the multi purpose sheet feeder make sure it is straight If the paper is curled you should straighten it before printing Sometimes it is helpful to remove the paper turn the stack over and put it back into the paper tray Re...

Page 203: ...ng Windows 95 or Windows 3 1 with the supplied printer driver see the Setting up the Printer for Windows section Try to reduce the complexity of your document or reduce the print resolution The printer prints the first couple of pages correctly then some pages have text missing For HL 730 730Plus series Only This is a problem usually relating to serial interface settings Your computer is not recog...

Page 204: ...t in Chapter 5 If the same problem occurs and the Drum lamp is still on after cleaning replace the drum unit with a new one Printed pages are stained with toner or have vertical stripes Here come Flat top he come One thing I can tell you is you go to be free Come together right now over me Here come Flat top he come One thing I can tell you is you go to be free Come together right now over me Here...

Page 205: ...o be free Come together right now over me Here come Flat top he A come One thing I can tell you is you go to be free Come together right now over me Here come Flat top he come One thing I can tell you is you go to be free Come together right now over me Here come Flat top he come One thing I can tell you is you go to be free Come together right now over me Here come Flat top he come Lucy in the sk...

Page 206: ...ome One thing I can tell you is you go to be free Come together right now over me Here come Pat top he come One thing I can tell you is you go to be free Come together right now over me Here come v he come Lucy Diamonde in the sky with One thing I can tell you is you go to be free Come tin the skyright now over me Here come Pat top he come One thing I can tell you is you go to be free Come in the ...

Page 207: ...rom the multi purpose sheet feeder NOTE Maximum print speed is obtained by printing several copies of the same page Print speed may vary depending on interface type emulation processing power of the computer memory allocated to the print job paper size and graphic quality Warm Up 20 seconds at 23 C 73 4 F The warm up time depends on the ambient temperature and humidity First Print 20 seconds when ...

Page 208: ...P PCL level 4 EPSON FX 850 or IBM Proprinter XL Printer Driver Windows 3 1 3 11 and Windows 95 driver supporting Brother Native Compression mode and bi directional capability Optional Macintosh driver available for System 6 0 7 or higher For HL 730 730Plus series Only Interface Bi directional parallel RS 422A RS 232C serial interface RS 100M is optionally available For HL 730 730Plus series Only M...

Page 209: ...35 W or less Sleep 7 W or less Noise Printing 48 dB A or less Sleep 35 dB A or less Temperature Operating 10 to 32 5 C 50 to 90 5 F Storage 0 to 40 C 38 to 104 F Humidity Operating 20 to 80 without condensation Storage 20 to 80 without condensation Dimensions W x H x D 366 x 250 x 353 mm 14 4 x 9 8 x 13 9 inches when the output tray is closed Weight Approx 6 5 kg 14 3 lb including the drum unit ...

Page 210: ...enol FCN 685J036 L X or equivalent A shielded cable should be used Pin Assignment Pin No Signal Direction Pin No Signal Direction 1 DATA STROBE Input 19 0V S G 2 DATA 1 Input 20 0V S G 3 DATA 2 Input 21 0V S G 4 DATA 3 Input 22 0V S G 5 DATA 4 Input 23 0V S G 6 DATA 5 Input 24 0V S G 7 DATA 6 Input 25 0V S G 8 DATA 7 Input 26 0V S G 9 DATA 8 Input 27 0V S G 10 ACKNLG Output 28 0V S G 11 BUSY Outpu...

Page 211: ...e cable which has the pin connections above must be used Pin 1 18 2 19 3 4 20 5 6 21 7 8 22 9 10 24 11 23 12 13 14 25 16 15 17 Shield Pin 1 19 2 20 3 21 4 22 5 23 6 24 7 25 8 26 9 27 10 28 11 29 12 17 13 15 14 30 31 33 32 34 36 35 18 16 Shield Fig A 1 Parallel Interface Cable ...

Page 212: ...esident in this printer Brougham 10 12 point upright normal upright bold italic normal italic bold Brougham 12 10 point upright normal upright bold italic normal italic bold Letter Gothic 16 66 8 5 point upright normal upright bold italic normal italic bold Portrait and Landscape are available for the above ...

Page 213: ... 8 Turkish HP mode ISO14 JIS ASCII ISO57 Chinese ISO11 Swedish HP Spanish ISO17 Spanish ISO10 Swedish ISO16 Portuguese ISO84 Portuguese ISO85 Spanish PC 8 PC 8 D N PC 8 Turkish PC 850 PC 852 PC 860 PC 863 PC 865 Roman 8 ISO Latin 1 ECMA 94 ISO60 Norwegian 1 ISO61 Norwegian 2 ISO4 UK ISO25 French ISO69 French HP German ISO21 German ISO15 Italian ISO6 ASCII Legal ISO2 IRV Note If you want to know wh...

Page 214: ... 1 error message 6 2 recoverable 6 1 unrecoverable 6 4 extension support wire 1 2 F Factory Reset 3 4 H hex dump print 3 4 I interface A 2 error 6 2 J jammed paper 6 5 L label 2 1 M Macintosh 1 4 6 10 manual feed slot 1 2 2 8 memory A 2 board 4 6 full 6 2 misfeed 6 1 multi purpose sheet feeder 1 2 2 4 capacity 2 1 O operator call 6 1 6 3 organizer 2 1 output tray 1 2 2 10 capacity 2 1 P paper capa...

Page 215: ...e 1 4 resident font A 6 resolution 1 3 A 1 robust 4 3 RPC 1 4 RS 232C 4 2 RS 422A 4 2 S scanner window 5 13 serial interface 4 1 cable 4 4 parameter 4 3 RS 422A RS 232C port 1 2 service call 6 4 sleep mode 1 5 3 3 slide switch 1 2 4 2 starter sheet 5 9 stop bit 4 3 switch 3 3 symbol set A 7 T test print mode 3 4 test sample page 3 4 time out 3 3 toner empty 6 1 low 6 1 toner cartridge 5 1 life A 1...

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