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2.4 Warning Temperature and Power Failure Protection
The projector will be automatically turned off when the internal temperature of the
projector is abnormally high, or the cooling fans stop spinning, or the power supplies in
the projector are failed.
• If the WARNING indicator is flashing, it may detect the abnormal temperature inside
the projector. Check the following possible causes and wait until the WARNING
indicator stops flashing, and then try to turn on the projector.
• If the WARNING indicator lights red, it may defect the cooling fans or power supply
circuits. Check fans operation and power supply lines referring to the chapter “Power
supply & protection circuit” in the Chassis Block Diagram section.
[Possible causes]
• Air filters are clogged with dust particles. Remove dust from the air filters 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)
2.5 Air Filter Care and Cleaning
The removable air filter prevents dust from accumulation on the surface of the
projection lens and projection mirror. Should the air filter become clogged with dust
particles, it will reduce the cooling fan’s effectiveness and may result in internal heat
build up and reduce the life of the projector.
To clean up the air filters, follow the cleaning
procedure below:
1. Turn the power off, and disconnect the AC
power cord from the AC outlet.
2. Turn the projector up side down and remove
air filters by pulling the latches of it upward.
3. Clean the air filters with brush or wash out
the dust and particles.
4. Replace the air filters properly. Make sure
that the air filters are fully inserted.
Part 2: Repair Information
2-3
Do not operate the projector with the air filters removed. Dust may
accumulate on the LCD panel and the projection mirror degrading picture
quality.
Do not put small parts into the air intake vents. It may result in
malfunction of the projector.
CAUTION
Fig. 2-4
Air filter
Содержание LV-X4U
Страница 2: ...CANON Multimedia Projector LV X4U D78 5532 LV X4E D78 5533 SERVICE SMANUAL ...
Страница 9: ...Part 1 General Information ...
Страница 26: ...Part 2 Repair Information ...
Страница 43: ...Part 3 Adjustment ...
Страница 62: ...Part 4 Troubleshooting ...
Страница 79: ...Part 4 Troubleshooting 4 17 AN5870SB RGB SYNC SW IC5201 LM4889 Audio Amplifier IC5031 ...
Страница 81: ...Part 4 Troubleshooting 4 19 FA5502 P F Control IC621 VPC3230D Video Decoder IC101 ...
Страница 82: ...Part 4 Troubleshooting 4 20 L3E07070 Signal Processor for TFT LCD IC401 NJW1141 Audio Selector IC5001 ...
Страница 83: ...Part 4 Troubleshooting 4 21 STR Z2156A Power Switching Control IC631 PW168A Scaler Main CPU IC301 ...
Страница 84: ...Part 4 Troubleshooting 4 22 TA1370FG Sync Separator Frequency Counter IC5302 ...
Страница 85: ...Part 5 Parts Catalog ...
Страница 86: ......
Страница 94: ......
Страница 96: ...V 1 U 2 U 1 V 2 Z 1 Z 2 X Y W Accessories Page 5 CANON LV X4J LV X4U LV X4E REF NO D78 5531 D78 5532 D78 5533 ...
Страница 100: ...Part 6 Electrical Diagrams ...