2.3 Lamp Cover Switch
The lamp cover switch (SW8801) cuts off the
drive signal to the lamp circuit when the lamp
cover is removed or no close completely. After
opening the lamp cover for replacing the lamp
ass’y, place the lamp cover correctly otherwise the
projector can not turn on.
2.4 Warning Temperature and Power Failure Protection
The WARNING indicator flashes red and the projector will automatically turn off when
the internal temperature of the projector exceeds the normal temperature or when
stopping cooling fans or when the internal power supply lines are failed.
Check the following possible causes and wait until stopping the WARNING indicator
flashing.
[Possible causes]
• Air filter is clogged with dust particles. Remove dust from the air filter by following
instructions in the “Air filter care and cleaning” below.
• Ventilation slots of the projector are blocked. In such an event, reposition the
projector so that ventilation slots are not obstructed.
• Check if projector is used at higher temperature place (Normal operating temperature
is 5 to 35˚C or 41 to 95˚F)
If the WARNING indicator still continues to flash, there may be defects on cooling fans
or power supply circuits. Please check fan operation and power supply lines referring to
the “Power Supply Lines Chart”.
Part 2: Repair Information
2-3
Fig. 2-3
Lamp Cover Switch
Lamp Cover
Содержание LV-S3E/D78-5423
Страница 2: ...CANON Multimedia Projector LV S3U D78 5422 LV S3E D78 5423 SERVICE SMANUAL ...
Страница 9: ...Part 1 General Information ...
Страница 24: ...Part 2 Repair Information ...
Страница 42: ...Part 3 Adjustment ...
Страница 59: ...Part 4 Troubleshooting ...
Страница 73: ...Part 4 Troubleshooting 4 14 BA7078AF Sync Detector IC5301 BA9743AFV DC DC Converter IC371 ...
Страница 74: ...Part 4 Troubleshooting 4 15 LM4865 Audio Amplifier IC5003 PW168A Scaler Main CPU IC301 ...
Страница 75: ...Part 4 Troubleshooting 4 16 TA1370FG Sync Separator Frequency Counter IC5302 VPC3230D Video Decoder IC101 ...
Страница 76: ...Part 5 Parts Catalog ...
Страница 77: ......
Страница 93: ...Part 6 Electrical Diagrams ...