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7

28JF-73E

•••••

 Use the channel up and down buttons to move between the options.

•••••

 Use the volume control buttons to change the data.

•••••

 To store the data, use the stand-by button on the remote control.

•••••

 To exit the Service Mode, turn the receiver off using the mains switch.

When the Service Mode is entered the following On Screen Display appears

SERVICE SOFTWARE 

∗∗−∗∗

x

∗∗

SW on: XXXX   SW off: XXXX   Hours ON: XXXX

The figures displayed in the “XXXX” locations are hexadecimal representations of the number of times that particular
function has been executed. For example if the hexadecimal number displayed after “SW on” was 0E4A, this would
correspond to the receiver being turned on 3658 times.
The figure displayed in the “

∗∗−∗∗

x

∗∗

” location is the EPROM version.

 

X

Adjustment menu:

The following adjustments can be carried out in the Service Mode.

When in the Service Mode it is possible to access certain functions by using the teletext keys as below.

•••••

 By pressing the   Blue   button each adjustment can be directly accessed via the remote control. Referring to the

list above, press the   Blue  button followed by the adjustment number, this will directly access the selected
adjustment. If any number above 29 is selected, the set will revert to the Service Mode entry page. To access a
number less than 10, use the 0 key first, i.e. 02.

•••••

 Press the  Yellow  button to go straight to the AGC adjustment.

•••••

 Press the Green  button once to enter  “FACTORY VOLUME” level. Use volume control keys to change the

setting. The original value will be recovered after resetting the TV set.

•••••

 Press the Green  button twice to enter  “FACTORY BALANCE” level. Use volume control keys to change the

setting. The original value will be recovered after resetting the TV set.

•••••

 Press the  Green  button three times to enter  “FACTORY BASS” level. Use volume control keys to change the

setting. The original value will be recovered after resetting the TV set.

•••••

 Press the   Green  button four times to enter  “FACTORY TREBLE” level. Use volume control keys to change the

setting. The original value will be recovered after resetting the TV set.

•••••

 Press the   Red   button once to enter “FACTORY CONTRAST” level.  Use volume control keys to change the

setting. The adjustment is stored automatically.

•••••

 Press the    Red    button twice to enter “FACTORY BRIGHTNESS” level.  Use volume control keys to change the

setting. The adjustment is stored automatically.

•••••

 Press the    Red     button three times to enter “FACTORY COLOUR” level.  Use volume control keys to change the

setting. The adjustment is stored automatically.

•••••

 If buttons 0 through 9 are pressed, the set will automatically go to that program number.

•••••

 By pressing the Menu button, the unit will normalise Picture and Audio settings. The Auto Installation is then

turned “on”.

01. Horizontal Shift
02.

 

East West Width

03.

 

Pin Phase

04. Pin Amp (

Amplitude

)

05. Corner Amplitude
06. Corner Symmetry
07. Vertical Linearity
08. Vertical Angle
09. Vertical Bow
10. Vertical Amplitude

11. S Correction
12. Vertical Shift
13. Red Gain
14. Green Gain
15. Blue Gain
16. Red Cut Off
17. Green Cut Off
18. Blue Cut Off
19. Alter NVM Pag (

Page

)

20. Alter NVM Pos (

Position

)

21. Alter NVM Val (

Value

)

22. Teletext Mix Mode Contrast
23. Teletext Contrast
24. OSD Contrast
25. DVCO Adjustment (Only PAL)
26. DVCO Adjustment (Only NTSC)
27. AGC Adjustment
28. Rotation Inspection
29. Auto Installation On/Off

Summary of Contents for 28JF-73E

Page 1: ...TENTS ELECTRICAL SPECIFICATIONS 3 IMPORTANT SERVICING NOTES 4 CONTROLS TERMINALS 5 ADJUSTMENT PROCEDURES 6 LED FLASHING CODES 12 PRINTED WIRING BOARDS 13 CHASSIS LAYOUT 20 ICs ADDITIONAL INFORMATION 22 SCHEMATIC DIAGRAMS 32 TROUBLESHOOTING TABLES 46 PARTS LISTING 49 PACKING OF THE SET ACCESSORIES 58 SOURCE OF DOCUMENTATION 59 SHARP CORPORATION MODEL 28JF 73EES PAL B G I SECAML L B G D K SYSTEM COL...

Page 2: ...f only part number changes are required just change part number directly the part number in the Parts Listing Section If you need more information please refer to the Technical Report Bulletin SERVICE MANUAL UPDATE LOG SHEET Part No Technical Report No Technical Bulletin No Cause Solution Page No Application Data Serial No ...

Page 3: ...ethod IEC60107 77W Stand by Operation 3W Audio Power Output Rating MPO Impedance Internal Left Speaker 10W 7Ω Internal Right Speaker 10W 7Ω Speakers Left Right 13 x 6cm Convergence Maximum Misconvergence Static Centre between any two colours 0 08 cm Dynamic after static equals zero Within 10cm 4 circle 0 12cm 10 25cm 4 10 circle 0 20 cm Everywhere else 0 28 cm Focus High Bi Potential Electrostatic...

Page 4: ... x ray radiation levels This is a problem when in close proximity to the receiver for long periods of time To reduce any risks associated with this please observe the following precautions 1 When undertaking any servicing on this chassis DO NOT increase the EHT to more than 32 5 KV at a instantaneous beam current of 1500µA 2 Ensure that during normal operation the EHT does not exceed 30 0 KV 1 5KV...

Page 5: ...5 28JF 73E 1 2 3 HOW TO OPEN THE DOOR Lift the projection at the lower right of the door with your finger in the direction of the arrow 8 4 2 3 1 0 1 2 3 4 a 55 6 6 78 6 CONTROLS TERMINALS ...

Page 6: ...4 5 TV 1 Stand by button TV Video 2 Power button VCR TV 3 0 9 digit buttons 4 Flash back button Teletext 5 GREEN button 6 RED button TV 7 Volume DOWN button 8 MENU button Teletext 9 REVEAL button 10 LIST button 11 STORE button 12 CANCEL button 13 HALF PAGE button TV 14 RESET button Video 15 Rewind picture search reverse 16 Play button 17 Pause Still button 18 Stop button TV 19 TV VIDEO button 20 C...

Page 7: ...reen button twice to enter FACTORY BALANCE level Use volume control keys to change the setting The original value will be recovered after resetting the TV set Press the Green button three times to enter FACTORY BASS level Use volume control keys to change the setting The original value will be recovered after resetting the TV set Press the Green button four times to enter FACTORY TREBLE level Use ...

Page 8: ...n button is pressed side pincushion changes Press the stand by button on the remote control to store Pin Amp Adjust the Pin Amp so that the picture is centred The effect of this adjustment is shown in figure 5 When the volume up button is pressed side pincushion changes from pincushion to barrel shape When the volume down button is pressed side pincushion changes from barrel shape to pincushion Pr...

Page 9: ...nning decreases and the lower picture scanning increases When the volume down button is pressed the upper picture scanning increases and the lower picture scanning decreases Press the stand by button on the remote control to store Vertical Angle Adjust the Vertical Angle so that the picture is centred The effect of this adjustment is shown in figure 9 When the volume up button is pressed the verti...

Page 10: ...crease press volume up button and to decrease press volume down button RED CUT OFF alter X coordinate GREEN CUT OFF alter Y coordinate BLUE CUT OFF alter X and Y coordinate 3 Follow the procedure below to set the GAIN 3 1 Using brightness and contrast buttons select a luminance of 100 NITS S Correction Adjust the S Correction so that the picture symmetrical between the top centre and bottom The ef...

Page 11: ...ettings to achieve good tracking Note The data to be adjusted is contained at the bottom right corner of the picture See Figure 15 Changing NVM Data To change the data contained within the Non Volatile Memory it is necessary to first select the page the data is stored in then the position and finally to change the data itself The procedure below outlines this process 1 Press the channel up down bu...

Page 12: ...otation Inspection No adjustment required Just to check the proper working of this user feature It cannot be memorized and after reset the TV the picture will appear normalized as other features Auto Installation On Off To return the receiver to the original Auto Installation mode using the volume up or down button set the Auto Installation On Off to On This setting is automatically stored and whe...

Page 13: ...3 28JF 73E FB218WJN2 CRT UNIT PWB Component side FB218WJN2 CRT UNIT PWB Copper side 11 1 2 3 4 5 6 7 8 9 10 Y X 0 10 11 12 13 1 2 3 4 5 6 7 8 9 Y X 11 1 2 3 4 5 6 7 8 9 10 0 10 9 8 7 6 5 4 3 2 1 13 12 11 ...

Page 14: ...14 28JF 73E 22 23 24 25 17 18 19 20 21 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 Y X 0 10 11 12 13 14 15 16 17 1 2 3 4 5 6 7 8 9 Page 15 FB217WJN4 MOTHER UNIT PWB Component side ...

Page 15: ...15 28JF 73E FB217WJN4 MOTHER UNIT PWB Component side Page 14 29 30 31 32 33 20 21 22 23 24 25 26 27 28 17 18 19 Y X 22 23 24 25 17 18 19 20 21 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 16 ...

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