![background image](http://html1.mh-extra.com/html/canon/lv-7545u/lv-7545u_service-manual_4146691071.webp)
2) Power/lamp drive signal error
●
Power start signal (FAN_DRIVE_SW) error
The FAN_SW signal is output from pin 137 of IC801, passes through Q4807, is sent
to the power switching circuit. This signal drives the power oscillation circuit of the
power supply unit and the cooling fan power circuit of the power supply circuit.
FAN_DRIVE/FAN_SW is high when power is on.
Check FAN_DRIVE, FAN_SW signal, switching circuit Q6623, Q6624, Q6604,
IC6604, IC6602, IC6603, IC6606 and its peripheral circuits.
●
Fan drive signal (IC_RESET) error
The IC_RESET signal is output from pin 2 of IC801, sent to Q6616, Q6612, and
Q6613 of the sub power supply unit. They switch power lines 9V, 9VA, 15.7V, 15VP
and 3.4V.
IC_RESET is high when power is on.
Check the IC_RESET signal, IC801, drive transistor, diode, IC, Q6616, Q6617,
Q6612, Q6611, Q6613, Q6626, Q6602, Q6628, IC6608, IC6618, IC6607, IC6601,
IC6616, and its peripheral circuits.
●
Power supply drive signal (LAMP_SW) error
The LAMP_SW signal is output from pin 138 of IC801, passes through K8L 3 pin of
the main board, and drives the lamp ballast unit.
LAM_SW is high when power is on.
Check the LAMP_SW signal, IC801 and peripheral circuits.
3) Power supply circuit error
●
Primary side power erro
Check line filter L601, L602, D604, Q601, DS601, L611, IC651 and D632.
●
Secondary side power error
Check D681, D682, D683 and IC681.
Part 4: Troubleshooting
4-2
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: ......