1.2 No Picture
The possible causes of No Picture are listed below. Please check following and refer to
video signal processing diagrams in the figure opposite.
1) No picture from Video source
●
Composite video input
• Check composite video signal at pins 45 and 46 of K3U on the Main Board and
K10U on the AV Board.
• Check Y, C signals at pins 7 and 9 of IC2101.
• Check Y, C signals at pins 5 and 7 of IC1101
●
S-video input
• Check S-video signals at pins 39, 40 (Y), 41, 42 (C) of K10U and K3U.
• Check Y, C signals at test points TP11SC and TP11SY.
• Check Y, C signals at pins 43 and 44 of IC1101.
●
Component input
• Check component signals at pins 49, 50 (Pb), 51, 52 (Pr) of K10U and K3U.
• Check component signals (Y, Pr, Pb) at test points TP11CV, TP11PR and TP11PB.
●
All of video signals
• Check component signals (Y, Cb, Cr) at pins 21, 22 and 23 of IC1101.
• Check component signals (Y, Cb, Cr) at pins 69, 68 and 67 of IC4101.
• Check component signals (Y, Pb, Pr) at pins 75, 74 and 73 of IC4101.
• Check Sync signals (AV_HSYNC, AV_VSYNC) at pins 4 and 9 of IC1101.
• Check Sync signals (AV_HSYNC, AV_VSYNC) at pins 65 and 66 of IC4101.
• Check RGB signals at pin 39, 37 and 35 of IC4101.
• Check RGB signals at pins 15, 4 and 14 of IC3101.
• Check blanking signal at pin 9, 10, 11 of IC3101.
• Check RGB signals at pins 1, 3 and 5 of IC5241.
• Check Sync signals (AV_HSYNC, AV_VSYNC) at pins 2 and 12 of IC6261.
• Check AV/PC switching signal at pin 22 of IC5241 and pins 10 and 11 of IC6261.
AV: Low, PC: High
Part 4: Troubleshooting
4-4
Содержание D78-5311
Страница 9: ...Part 1 General Information ...
Страница 22: ...Part 2 Repair Information ...
Страница 43: ...Part 3 Adjustment ...
Страница 65: ...Part 4 Troubleshooting ...
Страница 82: ...Part 4 Troubleshooting 4 17 BA7078AF Selector IC6241 CXA2101AQ RGB Matrix IC4101 ...
Страница 83: ...Part 4 Troubleshooting 4 18 CXD2064Q Digital Comb Filter IC2101 L3E01031 Level Shift IC3501 IC3531 IC3561 ...
Страница 85: ...Part 4 Troubleshooting 4 20 ML60851 USB I F IC9801 M62393 D A IC2571 ...
Страница 86: ...Part 4 Troubleshooting 4 21 TB1274AF Video Decoder IC1101 TA1318N AFC Detector IC6171 ...
Страница 87: ...Part 4 Troubleshooting 4 22 FA7612CA PWC Controller IC65A IC671 IC681 STR Z2156 Switching Controller IC631 ...
Страница 88: ...Part 5 Parts Catalog ...
Страница 89: ......
Страница 107: ...Part 6 Electrical Diagrams ...
Страница 117: ......