![background image](http://html1.mh-extra.com/html/canon/lv-7545u/lv-7545u_service-manual_4146691074.webp)
2) No picture at computer input
Check that the RGB signals are observed at pins 19-20, 23-24 and 27-28 of K10Q on
the AV unit and K8B on the main board.
Check that the synchronizing signals (CG_HSYNC, CG_VSYNC) are observed at pins
11-12 and 13-14 of K10Q on the AV unit and K8B on the main board.
Check that the RGB signals are observed at test points TP20R, TP21R, TP20G, TP21G,
TP20B, and TP21B.
Check that the synchronizing signal is observed at test points TPHS and TPVS.
Check that the CG1/CG2 switching signal is observed at pin 22 of IC5201 and pins 16
and 11 of IC5204. The CG1/CG2 signal is output from pin 50 of IC801.
CG1: Low
CG2: High
Check that the CG/HD switching signal is observed at pin 22 of IC201 and pins 9 and
10 of IC3231. The CG/HD signal is output from pin 52 of IC1801.
CG: Low
HD: High
3) No picture at both video and computer input
Check that the RGB signals are observed at test points TP20R, TP21R, TP20G, TP21G,
TP20B and TP21B.
Check that the synchronizing signals are observed at test points TPHS and TPVS.
Check that the clamp pulse signals are observed at test points IC211 and IC212.
4) No picture at DVI (digital) input
Check the 5V voltage (5VDVI) at pins 1 and 2 of K10P.
Check that the synchronizing signals are observed at pins 47 and 48 of IC8001.
Check IC8001 and peripheral circuits.
5) No picture at all inputs
Check that the RGB S&H signal is observed at test points TP501, TP1501, TP531,
TP1531, TP561 and TP1561.
Check that the NRS signal is observed at test point TP2551.
Check 15.5V, 15VP power supply line and peripheral circuits.
Check IC501, IC1531, IC561, IC1501, IC1531, IC1561, IC9401, IC401 and IC3301
and peripheral circuits.
Part 4: Troubleshooting
4-5
Signal/terminal
K10Q/K8B
Signal/terminal
K10R/K8A
CG1/CG2-SW
5-6
AV_Y/Video
3-4
H-Sync
11-12
AV_PB
7-8
V-Sync
13-14
AV_PR
11-12
B
19-20
S_SW-IN
15-16
G
23-24
IN2/IN3-SW
33-34
R
27-28
S-Y
47-48
S-C
51-52
Содержание LV-7545U
Страница 2: ...CANON Power Projector LV 7545E D78 5231 SERVICE SMANUAL ...
Страница 9: ......
Страница 10: ...Part 1 General Information ...
Страница 23: ...7 SUPPORTED COMPUTER SYSTEM MODE See the attached sheet Owner s Manual page 26 Part 1 General Information 1 13 ...
Страница 24: ......
Страница 25: ...Part 2 Repair Information ...
Страница 46: ...Part 3 Adjustment ...
Страница 69: ...Part 4 Troubleshooting ...
Страница 86: ...Part 4 Troubleshooting 4 17 BH3540 Volume Control IC1652 CXA2101AQ RGB Matrix IC4101 ...
Страница 87: ...Part 4 Troubleshooting 4 18 FA5332M P F Controller IC601 FA7612CA PWC Controller IC6602 IC6603 IC6616 ...
Страница 90: ...Part 4 Troubleshooting 4 21 LB1645 Motor Drive IC1601 LC863316 SUB CPU IC1851 ...
Страница 91: ...Part 4 Troubleshooting 4 22 ML60851 USB I F IC9801 M62393 D A IC212 IC2381 ...
Страница 92: ...Part 4 Troubleshooting 4 23 M62399 D A IC3501 IC3551 PW365 System Control Scan Converter IC301 ...
Страница 93: ...Part 4 Troubleshooting 4 24 SII161ACT DVI I F IC8001 STR Z2156 Power Switching IC651 ...
Страница 94: ...Part 4 Troubleshooting 4 25 TA1287 RGB YUV Converter IC4551 TB1274AF Video Decoder IC1101 ...
Страница 95: ...Part 4 Troubleshooting 4 26 TDA7056 Audio Output IC1631 IC1632 ...
Страница 96: ...Part 5 Parts Catalog ...
Страница 97: ......
Страница 101: ...62 54 63 53 62 58 61 64 56 59 70 71 52 55 65 Page 2 CANON LV 7545J REF No D78 5231 LV 7545U D78 5232 LV 7545E D78 5233 ...
Страница 105: ...Page 4 CANON LV 7545J REF No D78 5231 LV 7545U D78 5232 LV 7545E D78 5233 23 a 23 b 23 51 b 51 a 51 43 43 2 ...
Страница 113: ...Part 6 Electrical Diagrams ...
Страница 130: ......