Sharp AL-1020, Service Manual

Page 1: ... service only The contents are subject to change without notice Parts marked with is important for maintaining the safety of the set Be sure to replace these parts with specified ones for maintaining the safty and performance of the set 1 GENERAL 1 1 2 SPECIFICATIONS 2 1 3 EXTERNAL VIEWS AND INTERNAL STRUCTURE 3 1 4 UNPACKING AND INSTALLATION 4 1 5 OPERATIONAL DESCRIPTIONS 5 1 6 DISASSEMBLY AND AS...

Page 2: ...ent feeding through the single pass feeder SPF can be performed Toner save mode reduces toner consumption by ap proximately 10 User programs allow setting modification of functions for customer s needs D Scan once Print many This copier is equipped with a 1 page memory buffer This Memory allows the copier to scan an original 1 time only and make up to 99 copies This feature allows for improved wor...

Page 3: ...ray 250 sheet Multi bypass 50 sheet 2 tray 250 sheet 2 Multi bypass 50 sheet 1 tray 250 sheet Multi bypass 50 sheet Electrical section Power source Voltage 100V 110V 120 127V 230V 240V Frequency Common use for 50 and 60 Hz Power consumption Max 1000 W Average during copying 275 Wh H 1 285 Wh H 1 285 Wh H 1 270 Wh H Average stand by 70 Wh H 1 Pre heat mode 40 Wh H 1 Auto power shut off mode 18 Wh H...

Page 4: ... 11 B5 Landscape Copy speed CPM Same size 10 12 Enlargement 10 12 Reduction 10 12 Inch system 8 1 2 14 Landscape Copy speed CPM Same size 10 10 Enlargement 10 10 Reduction 10 10 8 1 2 11 Landscape Copy speed CPM Same size 10 12 Enlargement 10 12 Reduction 10 12 Void Void area leading edge 1 255 4 mm Tailing edge 4 mm or less Side void area 4 mm or less per side Image loss leading edge Same size 3 ...

Page 5: ...s effective either in the OC copy mode or in the SPF copy mode 2 The SOPM in the SPF copy mode Even when a document is set on the document table and the SPF mode lamp is lighted the quantity display remains unchanged does not turn to 1 Under that condition press the quantity set key to set the quantity 3 Basic operation The first document is read and data are stored in the memory and copies of the...

Page 6: ...ace 2 16 Paper output tray 17 Paper output tray extension 18 Power switch 19 Power cord socket 20 Parallel interface connector 3 1 The AL 1250 is equipped with two paper trays 2 AL 1020 AL 1220 only For the AL 1020 AL 1220 a printer upgrade kit is optional 3 AL 1250 only 2 Internal 1 TC cartridge lock release button 2 TD cartridge 3 Drum cartridge 4 Drum cartridge handle 5 Paper feed roller 6 Fusi...

Page 7: ...sheets are copied the indicator starts blinking and machine starts to supply toner Toner Developer cartridg replacement indicator keeps lighting up If toner density is not back to specific level after two minutes the READ indicator goes out and Toner Developer indicator starts blinking and the copier stops 2 ON Indicates that the machine is in the energy saving pre heat mode Blink Indicates that t...

Page 8: ...anner unit 3 Toner motor TM Supplies toner 4 Cooling fan motor VFM Cools the optical section 5 Resist roller solenoid RRS Resist roller rotation control solenoid 6 Paper feed solenoid CPFS1 Cassette Paper feed solenoid 7 Multi paper feed solenoid MPFS Multi manual pages feed solenoid 8 SPF motor SPFM Drives the single pass feeder 1 2 3 4 5 7 6 8 AL 1250 3 3 ...

Page 9: ...pass 7 Door switch DSW Micro switch Door open close detection safety switch for 5V 1 or 0V of 5V at door open 8 Door switch DSW Micro switch Door open close detection safety switch for 24V 1 or 0V of 24V at door open 9 Drum reset switch DRST Micro switch New drum detection switch Instantaneously H at insertion of new drum 10 SPF sensor SPID SD SW Transmission sensor Paper entry detection Cover ope...

Page 10: ...trol 3 Operation PWB Operation input display 4 Power PWB AC power input DC voltage control High voltage control 5 CCD sensor PWB For image scanning 6 LSU motor PWB For polygon motor drive 7 TCS PWB For toner sensor control 8 LSU PWB For laser control 9 Memory PWB 6MB For memorying data 2 4 1 3 5 6 7 8 9 AL 1250 3 5 ...

Page 11: ...roller 8 Pressure roller Fuses toner on the paper Silicon rubber roller 9 Drum Forms images 10 Transfer unit Transfers images onto the drum 11 Pickup roller Picks up the manual feed paper In multi feed only 12 Manual paper feed tray Tray for manual feed paper 13 Manual paper feed roller Transport the paper from the manual paper feed port 14 PS roller unit Takes synchronization between the lead edg...

Page 12: ... extreme temperature or humidity changes e g near an air conditioner or heater Be sure to allow the required space around the machine for servicing and proper ventilation 2 CHECKING PACKED COMPONENTS AND ACCESSORIES Open the carton and check if the following components and ac cessories are included 8 20cm 8 20cm 4 10cm 4 10cm Copier Power cord TD cartridge Drum cartridge installed in copier Operat...

Page 13: ...e bypass tray and then open the side cover while pressing the side cover open button 2 Remove the CAUTION tape from the front cover and remove the two protective pins from the fusing unit by pull ing the strings upward one at a time 3 Push gently on both sides of the front cover to open the cover 4 Remove the TD cartridge from the bag Remove the protec tive paper Hold the cartridge on both sides a...

Page 14: ...he front of the paper tray To store the pressure plate lock rotate the lock to fix it on the relevant location 4 Adjust the paper guides on the paper tray to the copy paper width and length Squeeze the lever of paper guide A and slide the guide to match with the width of the paper Move paper guide B to the appropriate slot as marked on the tray 5 Fan the copy paper and insert it into the tray Make...

Page 15: ...r 11 Paper exit follower roller 12 Document tray C Operational descriptions SPID ON PSW ON MIRM rotation MM rotation CPFS ON SPFM rotation SPUS ON Document set Document set sensor Document feed unit lamp ON PPD ON RRC ON SPPD ON POD ON Copy start The scanner is shifted to the exposure position Copier side Main motor rotation Paper feed Synchronization Transfer Fusing Document exit Paper transport ...

Page 16: ...ng document transport SPF motor rotating 6 DISASSEMBLY AND ASSEMBLY 1 SPF No Part name Ref A Sensor PWB B Pickup solenoid C Clutch D Manual paper feed roller pickup roller E Belt F SPF motor G Paper entry sensor H PS roller I Paper exit roller Pickup unit removal 1 Remove three fixing pawls from the bottom of the machine 2 Remove the front cover and the rear cover 1 Remove the belt the paper feed ...

Page 17: ... hang iron core A on the solenoid arm C Clutch 1 Remove the E ring 2 Remove the pulley and bush 3 Slide the bush in the arrow direction 4 Lift the clutch and 5 remove the clutch 1 Remove the E ring 2 Remove the parts D Manual paper feed roller pickup roller 1 Lift the paper stopper 2 Slide the takeup roller unit 3 Slide the bush in the arrow direction 4 Remove the takeup roller unit 2 1 1 1 1 2 3 ...

Page 18: ...wo screws 2 Remove the document tray unit 3 Remove five screws 4 Remove the transport unit E Belt 1 Remove the belt F SPF motor 1 Remove the harness 2 Remove four screws 3 Remove the drive unit 4 Remove the belt 5 Remove two screws 6 Remove the SPF motor G Paper entry sensor 1 Loosen the screw 2 Open the paper exit PG 3 Remove the paper entry sensor 4 Remove the harness 1 2 3 1 1 4 1 2 1 3 3 3 3 4...

Page 19: ...pawl and install the unit 1 Open the right cabinet 2 Remove three screws 3 Remove one connector 4 While tilting down the 2nd connection arm A pull and remove the paper feed unit toward you When installing securely insert two bosses C on the machine side and two bosses D on the paper feed unit side Be sure to fix the earth B Insert the 2nd page feed A Paper sensor 1 Remove the pawl 2 Remove the pap...

Page 20: ...aring B E Paper feed clutch 1 Remove the E ring 2 Remove the paper feed clutch 3 Remove the parts When installing fit the cut surface A F 2nd paper feed roller 1 Remove the E ring and the parts 2 Remove the 2nd paper feed roller When installing hang the 2nd connection arm on the 2nd connection arm SP B Be sure to install so that the earth spring C is in contact under the bearing D 1 2 3 4 2 1 3 A ...

Page 21: ... pressed the RSPF resist clutch SRRC repeats ON 500 ms and OFF 500 ms 20 times 7 RSPF gate solenoid SGS operation check Operation Procedure When the start key is pressed the RSPF gate solenoid SGS repeats ON 500 ms and OFF 500 ms 20 times 26 2 SPF setting Operation Procedure 1 When this simulation is executed the currently set code number of SPF is displayed 2 Enter the code number and press the s...

Page 22: ...py image position and lead edge rear edge void amount on the copy paper by adjusting the image scan start position and the print start position resist roller ON timing at 100 Operation Procedure 1 When this simulation is executed the currently set value is displayed in two digits Center value 50 2 When the copy mode select key is pressed each setting mode and the display are changed The selected a...

Page 23: ...ent scan are adjusted by adjusting the scan left margin of ASIC and the print left margin register set value Operation Procedure 1 When this simulation is executed the currently set value is displayed 2 For a machine with a multi manual paper feed unit installed when the copy mode select key is pressed each set mode and display are changed For a machine with a single manual paper feed unit install...

Page 24: ...ss the start key The entered value is stored and a copy is made When the adjustment value is changed by 1 the D A output is changed by 1 digit dark for OC exposure When it is changed by 1 the output is changed by 1 digit light 3 When the clear key is pressed the entered value is stored and the simulation mode is terminated 64 1 Self print by the engine only 1 by 2 mode Outline Used to print in the...

Page 25: ... tion Change from 60 sec to 90 sec 1 Press the right and the left exposure adjustment keys simultaneously to start setting Keep pressing the keys for five sec Display lamps blink simultaneously and is displayed on the copy quantity display 2 Select the function code with the 10 digit key copy quantity set key The number of the selected function blinks on the digit of 10 on the copy quantity displa...

Page 26: ...lamp will blink and the adjusted level will be displayed on the exposure level display Adjustment For adjustment press the density adjustment key to select the density in 5 steps Terminating method When the density select key is pressed the mode display will turn from blinking to lighting to terminate the AE level adjust ment 5 Toner save mode setup and cancel Input method When the TEST mode lamp ...

Page 27: ... 9 ELECTRICAL SECTION 1 Block diagram A Overall block diagram AL 1250 9 1 ...

Page 28: ...B Main PWB block diagram AL 1250 9 2 ...

Page 29: ...ate solenoid control signal H Gate solenoid ON 202 SRRC Output TR array IC SPF resist roller clutch control signal H Clutch ON 203 SPUS Output TR array IC SPF pickup solenoid control signal H Solenoid ON 208 SPFS Output TR array IC SPF paper feed solenoid control signal H Solenoid ON 209 SMSEL Output TR array IC SPF mirror motor relay switch signal L Mirror motor H SPF motor 227 CPFS2 Output TR ar...

Page 30: ...nal to IC113 to drive the mirror motor by 1 2 phase excitement The SPF motor and the mirror motor are switched with relays RY1 and RY2 The switching signal is SMSEL When SMSEL is LOW a current flows through the SPF motor When it is HIGH a current flows through the mirror motor M 24V 24V mir RY102 G5V 2 OMRON RY101 G5V 2 OMRON M ULN2003 SMSEL SPF motor AL 1250 9 4 ...