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1. TROUBLESHOOTING
1.1 No Power
This projector provides a function which can be specified a defective area simply by
indicating the LEDs on the control panel. Connect the AC cord and press the Power
button once and then check the LED indication.
●
When all the LED indicators are not lighting, the symptom indicates that the primary power
supply circuit does not operate properly. Check the power primary circuit and parts as follow;
• AC cord
• F601 (Fuse)
• Line filter board
• SW902 (Thermal sw.)........short in normal
SW902 opens when the surrounding temperature of the switch exceeds 100°C.
• SW904 (Interlock sw.) .......short in normal
Check the lamp cover is fixed firmly. The projector cannot turn on with lamp cover
removal.
●
When the WARNING TEMP indicator (red) is flashing, the symptom indicates that the
projector detected an abnormal temperature risen inside the projector. Check the air filters and
remove the object near the intake and exhaust fan openings, and wait until the WARNING
TEMP indicator flashing stops, and then try to turn on the projector.
• The internal temperature is monitored by sensor ICs, IC4801 on the Temp board
and IC8801 on the Main board.
●
When both of the TEMP WARNING (red) and READY (green) indicators are flashing at the
same time, the symptom indicates that the projector detected an abnormality in the cooling fan
operation or in the power supply secondary circuits. Check fan operation and power supply
lines, and the driving signal status.
• An abnormality occurs on the secondary power supply;
Check power supplies 15.5V, 6VS, 5VS, -5V. PF_LAMPDOWN signal (Error: L) is
sent to pin 79 of IC301 when the power error occurs. PF_LAMPDOWN signal is
output from pin 3 of IC711 driven by POWER_FAIL (Error: L) signal on pin 2. When
IC301, system control, detect s"L" on pin 79, IC301 sets the projector into the
standby mode and indicates error mode with the LEDs flashing.
• An abnormality occurs on the fans operation;
Check FN901, FN902, FN903, FN904, FN905, FN906.
• An abnormality occurs on the power failure detection circuit;
Check Q69A, Q68P, Q87P, D68P, D67P on the power board, IC711, and Q722 on
the Main board.
Part 4: Troubleshooting
4-1
Summary of Contents for D78-5382
Page 2: ...CANON Power Projector LV 5200U D78 5382 LV 5200E D78 5383 SERVICE SMANUAL ...
Page 9: ...Part 1 General Information ...
Page 25: ...Part 2 Repair Information ...
Page 45: ...Part 3 Adjustment ...
Page 65: ...Part 4 Troubleshooting ...
Page 84: ...Part 4 Troubleshooting 4 19 AD9884AKS A D IC8201 AN5870SB RGB SW IC5201 ...
Page 88: ...Part 4 Troubleshooting 4 23 LA7217 Sync Separator IC5361 M62392 D A IC3561 ...
Page 89: ...Part 4 Troubleshooting 4 24 M62393 D A IC281 IC7801 NJM2284M Switch IC2101 ...
Page 91: ...Part 4 Troubleshooting 4 26 VPC3230D Video Decoder IC3101 ...
Page 92: ...Part 5 Parts Catalog ...
Page 94: ......
Page 101: ...45 45 45 45 52 52 a 52 Page 4 CANON REF No LV 5200U D78 5382 LV 5200E D78 5383 ...
Page 107: ...U 1 U 2 V 1 W X Y Z 1 Page 7 Z 2 CANON REF No LV 5200U D78 5382 LV 5200E D78 5383 ...
Page 111: ...Part 6 Electrical Diagrams ...