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1.3 No Picture
1)
AV
board
1. Check that the Vcc-vo5V, -5V) are applied to AV circuits.
Pins 47-50 of K10A, Pins 47-54 of K10B ..............5V
Pins 39-42 of K10B ..............................................-5V
Check IC1001, IC1002 and IC1021.
2. Check that the following input signals are observed correctly.
2) Main board
1. Check the signals at following test points.
• Video signal at TP208, TP218
• V-sync signal at TP7224
• H-sync signal at TP7223
2. Check that the PC/AV switching signal is correct.
Pin 16 of IC5201 .................................................AV: H, PC: L
Pin 5 of IC5282 ....................................................AV: H, PC: L
3. Check that the RGB signals are observed at following test points.
TP211, TP221R, TP2211R ....................................R-signal
TP212, TP221G, TP2221G....................................G-signal
TP213, TP221B, TP2231B ....................................B-signal
4. Check that the signals are observed at following test points.
TPDHS, TP3322 ...................................................V-Sync,
TPDVS, TP3321 ...................................................H-Sync
5. Check that the RGB drive signals are observed at fllowing test point.
TP501 ..................................................................R-signal
TP531 ..................................................................G-signal
TP561 ..................................................................B-signal
6. Check that the S/H signals are observed at following test points.
TP1501, TP501R, TP502R ....................................R-signal
TP1531, TP503G, TP504G....................................G-signal
TP1561, TP505B, TP506B ....................................B-signal
7. Check that the PSIG signals are observed at test points TP1401 and TP1451.
Part 4: Troubleshooting
4-7
SIGNAL
K10A-pin No. K50A-pin No.
V-Sync
17-18
17-18
H-Sync
15-16
15-16
B
11-12
11-12
G
9-10
9-10
R
7-8
7-8
Video
33-34
33-34
S-C
29-30
29-30
S-Y
25-26
25-26
Содержание LV-7105
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Страница 3: ...CANON Multimedia Projector LV 7105U D78 5132 LV 7105E D78 5133 SERVICE SMANUAL...
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Страница 11: ...Part 1 General Information...
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Страница 33: ...Part 2 Repair Information...
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Страница 55: ...Part 3 Adjustment...
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Страница 77: ...Part 4 Troubleshooting...
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Страница 81: ...Memo Part 4 Troubleshooting 4 3...
Страница 91: ...Part 4 Troubleshooting 4 13 TP561 S H B INTPUT TP571 TP1571 S H B OUTPUT TP505B TP506B S H B OUTPUT...
Страница 92: ...Part 4 Troubleshooting 4 14 4 IC BLOCK DIAGRAMS FA5332M Power Factor Control IC01 AN5265 AUDIO OUTPUT IC001...
Страница 93: ...Part 4 Troubleshooting 4 15 PW164 10RK System Control Scan Converter IC301 CXA2111R LCD Driver IC401...
Страница 94: ...Part 4 Troubleshooting 4 16 M62358FP DAC IC431 CXD3503R White Uniformity Compensation IC471...
Страница 96: ...Part 4 Troubleshooting 4 18 IDT71V016S RAM IC811 CXA2016S Sync Separator IC1021...
Страница 97: ...Part 4 Troubleshooting 4 19 MC10H351ML IC1501 LM76CHMX Thermal Sensor IC1831 IC1832...
Страница 99: ...Part 4 Troubleshooting 4 21 TC4053BF Switching IC5001 SAA7114H Digital Video Processor IC5101...
Страница 100: ...Part 4 Troubleshooting 4 22...
Страница 101: ...Part 5 Parts Catalog...
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Страница 103: ...PARTS CATALOG Multimedia Projector LV 7105U REF NO D71 5132 LV 7105E D71 5133 Power Projector LV 7105J D71 5131...
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Страница 113: ...U 1 U 2 V 1 V 2 W 1 X 1 Z Page 5 CANON LV 7105J REF No D78 5131 LV 7105U D78 5132 LV 7105E D78 5133...
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Страница 118: ...Part 6 Electrical Diagrams...
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