SANYO - LCD-42XR7H - SERVICE MODE - AND - POWER SUPPLY - CIRCUIT
Method of entering the factory menu
The method of entering the factory menu is SOURCE, 2, 5, 8, 0.
Press 1 to enter page1, the function is Cotez Feature Setting, to set LOGO, frequency ect,.
Press 2 to enter page2, the function is Color Temperature Setting. The color temperature now is 12000.
Press 3 to enter page3, the function is Auto Color setting, to set AUTO COLOR of each channel.
Writing program
Write EEPROM N401, NA02, NS01, NB06, NB15.
Main board adjustment
a) Connect X401 of main board and IR board, insert 11-pin wire of power board to XB7, then the indicator light of IR board should be red.
b) Press POWER on the remote control, now the indicator light of IR board turns blue, test XB7 PIN1 to be 9V, PIN3 5V, PIN5/PIN6 12V, PIN9 3.3V, LB04 3.3V, NS03 PIN2 1.8V, N404 PIN2 2.5V.
c) Connect PC and serial terminal, flash write HDCP KEY.
The method of entering the factory menu is SOURCE, 2, 5, 8, 0.
Press 1 to enter page1, the function is Cotez Feature Setting, to set LOGO, frequency ect,.
Press 2 to enter page2, the function is Color Temperature Setting. The color temperature now is 12000.
Press 3 to enter page3, the function is Auto Color setting, to set AUTO COLOR of each channel.
Writing program
Write EEPROM N401, NA02, NS01, NB06, NB15.
Main board adjustment
a) Connect X401 of main board and IR board, insert 11-pin wire of power board to XB7, then the indicator light of IR board should be red.
b) Press POWER on the remote control, now the indicator light of IR board turns blue, test XB7 PIN1 to be 9V, PIN3 5V, PIN5/PIN6 12V, PIN9 3.3V, LB04 3.3V, NS03 PIN2 1.8V, N404 PIN2 2.5V.
c) Connect PC and serial terminal, flash write HDCP KEY.
TV board adjustment
1 IF amplify adjustment
a) Base on 3.3 a), connect 6-pin wire of power board and X04 of TV board, press POWER on the remote control, now the indicator light of IR board turns blue, TEST PIN2 of X04 to be 5V, PIN4 9V, L07 3.3V.
b) Input +5V to TP1 and 0V to TP2, input 38.9m IF signal to J1(use IF signal generator), adjust L10 to let X08 be 1.6V.
c) Input 0V to TP1 and +5V to TP2, input 33.5m IF signal to J1(use IF signal generator), adjust RP01 to let X08 be 1.6V. d) Joint the tuner J1.
1 IF amplify adjustment
a) Base on 3.3 a), connect 6-pin wire of power board and X04 of TV board, press POWER on the remote control, now the indicator light of IR board turns blue, TEST PIN2 of X04 to be 5V, PIN4 9V, L07 3.3V.
b) Input +5V to TP1 and 0V to TP2, input 38.9m IF signal to J1(use IF signal generator), adjust L10 to let X08 be 1.6V.
c) Input 0V to TP1 and +5V to TP2, input 33.5m IF signal to J1(use IF signal generator), adjust RP01 to let X08 be 1.6V. d) Joint the tuner J1.
2 Unit connect adjustment
Connect the main board, TV board, IR board, SCART connect board and key board according to the wiring diagram. Press POWER button on the remote control, the indicator light on IR board turns blue, test X12 PIN1 of TV board to be +24V.
3 AGC adjustment
a) Receive 60dB signal of D-8 and test X07 with DC voltmeter.
b) Adjust RP201 to let the data of voltmeter just below 4.0V.
c) Input 100dB signal of antenna, the picture should not no-synchronous or distortion; the color should not disappear when input 30dB-40dB low signal and the picture should synchronous and the sound normal.
Connect the main board, TV board, IR board, SCART connect board and key board according to the wiring diagram. Press POWER button on the remote control, the indicator light on IR board turns blue, test X12 PIN1 of TV board to be +24V.
3 AGC adjustment
a) Receive 60dB signal of D-8 and test X07 with DC voltmeter.
b) Adjust RP201 to let the data of voltmeter just below 4.0V.
c) Input 100dB signal of antenna, the picture should not no-synchronous or distortion; the color should not disappear when input 30dB-40dB low signal and the picture should synchronous and the sound normal.
5 VGA adjustment
1 mode preset
Input VG-848 of VGA signal(PATTERN 980:1 dot ON/OFF), select TIME877(720*400/70Hz), the TV will auto adjust to full screen, or enter display menu to do auto correction. Adjust TIME885(640*480/60Hz,TIME854(800*600/60Hz) by using the same method.
2 VGA channel Auto color
Input VG848 of VISA mode signal to VGA channel, enter factory menu of Auto Color Setting item, select VGA and press enter to do Auto Color.
6 YPbPr Auto Color
Input a high definition signal of VG-848, enter factory menu of Auto Color Setting item, select YPbPr and press enter to do Auto Color.
7 AV Auto Color
Input FLUKE VIDEO signal of PAL, select PATTERN of 100% Color bar, enter factory menu of Auto Color Setting item, select VIDEO1 and press enter to do Auto Color.
8 SCART Auto Color
Connect SCART1 RGB signal, input FLUKE signal of PAL system, PATTERN of 100% Color bar, enter factory menu of Auto Color Setting item, select SCART1 and press enter to do Auto Color.
Input VG-848 of VGA signal(PATTERN 980:1 dot ON/OFF), select TIME877(720*400/70Hz), the TV will auto adjust to full screen, or enter display menu to do auto correction. Adjust TIME885(640*480/60Hz,TIME854(800*600/60Hz) by using the same method.
2 VGA channel Auto color
Input VG848 of VISA mode signal to VGA channel, enter factory menu of Auto Color Setting item, select VGA and press enter to do Auto Color.
6 YPbPr Auto Color
Input a high definition signal of VG-848, enter factory menu of Auto Color Setting item, select YPbPr and press enter to do Auto Color.
7 AV Auto Color
Input FLUKE VIDEO signal of PAL, select PATTERN of 100% Color bar, enter factory menu of Auto Color Setting item, select VIDEO1 and press enter to do Auto Color.
8 SCART Auto Color
Connect SCART1 RGB signal, input FLUKE signal of PAL system, PATTERN of 100% Color bar, enter factory menu of Auto Color Setting item, select SCART1 and press enter to do Auto Color.
Performance check
1 TV function
Connect RF-TV terminal to the central signal source, enter the search menu→ auto search, check if there is station skipping, manual search, fine tuning, the output of earphone and speaker, the picture are normal.
2 SCART/AV/S terminal
Input SCART1(RGB+CVBS)/SCART2(CVBS+YC)/AV/S signal, check if the picture and sound are
normal.
3 AUDIO OUT/VIDEO OUT terminal
Separate input signal at the status of TV/SCART/AV/S, connect AUDIO/VIDEO OUT to the monitor and check if the sound and the picture of the AUDIO OUT are normal.
4 SCART terminal
1 check the content of SCART OUTPUT
Separate input signal at the status of TV/SCART/AV/S, connect AUDIO/VIDEO OUT to the monitor, check if the picture and sound of SCART1 OUTPUT are the picture and sound of TV when input SCART1(RGB+CVBS) and check if they are normal; check if the picture and sound of SCART2 OUTPUT are the picture and sound of the present signal when input SCART2(CVBS+YC) and check if they are normal.
2 check the function of SCART INPUT
a) Connect SCART1 and the signal generator after turn on, the TV should auto switch to SCART1 RGB or SCART1 CVBS. Connect SCART2 and the signal generator after turn on, the TV should auto switch to SCART2 CVBS or SCART2 YC.
b) SCART signal generator sends CVBS signal (color bar and multi-burst) to SCART1, check if the picture is normal, the OSD should be SCART1 VIDEO; the OSD should be SCART1 RGB when SCART1 signal switches to RGB format.
c) SCART signal generator sends CVBS signal (color bar and multi-burst) to SCART2, check if the picture is normal, the OSD should be SCART2 VIDEO; the OSD should be SCART2 S-VIDEO.
1 TV function
Connect RF-TV terminal to the central signal source, enter the search menu→ auto search, check if there is station skipping, manual search, fine tuning, the output of earphone and speaker, the picture are normal.
2 SCART/AV/S terminal
Input SCART1(RGB+CVBS)/SCART2(CVBS+YC)/AV/S signal, check if the picture and sound are
normal.
3 AUDIO OUT/VIDEO OUT terminal
Separate input signal at the status of TV/SCART/AV/S, connect AUDIO/VIDEO OUT to the monitor and check if the sound and the picture of the AUDIO OUT are normal.
4 SCART terminal
1 check the content of SCART OUTPUT
Separate input signal at the status of TV/SCART/AV/S, connect AUDIO/VIDEO OUT to the monitor, check if the picture and sound of SCART1 OUTPUT are the picture and sound of TV when input SCART1(RGB+CVBS) and check if they are normal; check if the picture and sound of SCART2 OUTPUT are the picture and sound of the present signal when input SCART2(CVBS+YC) and check if they are normal.
2 check the function of SCART INPUT
a) Connect SCART1 and the signal generator after turn on, the TV should auto switch to SCART1 RGB or SCART1 CVBS. Connect SCART2 and the signal generator after turn on, the TV should auto switch to SCART2 CVBS or SCART2 YC.
b) SCART signal generator sends CVBS signal (color bar and multi-burst) to SCART1, check if the picture is normal, the OSD should be SCART1 VIDEO; the OSD should be SCART1 RGB when SCART1 signal switches to RGB format.
c) SCART signal generator sends CVBS signal (color bar and multi-burst) to SCART2, check if the picture is normal, the OSD should be SCART2 VIDEO; the OSD should be SCART2 S-VIDEO.
when SCART2 signal
switches to YC format.
d) Disconnect SCART signal, the unit should return to the present TV situation.
Note: the function is act except VGA, YPBPR, HDMI.
VGA terminal
Input VGA signal (VG-848 signal generator), separate input VGA format signal of table 1 and check if the picture and sound are normal after auto correction. If the image is interfered, press the auto adjust button on the remote control again and check if it is normal.
d) Disconnect SCART signal, the unit should return to the present TV situation.
Note: the function is act except VGA, YPBPR, HDMI.
VGA terminal
Input VGA signal (VG-848 signal generator), separate input VGA format signal of table 1 and check if the picture and sound are normal after auto correction. If the image is interfered, press the auto adjust button on the remote control again and check if it is normal.
HDMI terminal
Input HDMI signal (VG848 signal generator), separate input YPBPR format signal of table1 and table2 and check if the picture and sound are normal. Check the picture and sound by using VG849 with HDMI terminal.
DVT-T function check
Connect DVB-T RF terminal to the central signal source, enter the search menu→ auto search, check if it can search the program or there is station skipping, check the output of earphone and speaker, if the picture are normal. Attenuate the signal to 25dBuV(16QAM program) and check the picture and sound.
Ex-factory preset
Perform “factory reset” of MENU to do ex-factory preset.
Input HDMI signal (VG848 signal generator), separate input YPBPR format signal of table1 and table2 and check if the picture and sound are normal. Check the picture and sound by using VG849 with HDMI terminal.
DVT-T function check
Connect DVB-T RF terminal to the central signal source, enter the search menu→ auto search, check if it can search the program or there is station skipping, check the output of earphone and speaker, if the picture are normal. Attenuate the signal to 25dBuV(16QAM program) and check the picture and sound.
Ex-factory preset
Perform “factory reset” of MENU to do ex-factory preset.
POWER SUPPLY CIRCUIT
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