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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”.
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 filters become clogged with dust particles, it will reduce the cooling fan’s effectiveness and may
result in internal heat build up and adversely affect the life of the projector.
To clean up the air filters, follow the cleaning procedure
below:
1.
Turn off the projector, and disconnect the AC power
cord from the AC outlet.
2.
Turn the projector upside down and remove the air fil-
ters by pulling the latches upward.
3.
Clean the air filters with a brush or rinse them softly.
4.
When cleaning the air filters by rinsing, dry them well.
Replace the air filters properly. Make sure that the air fil-
ters are fully inserted.
CAUTION:
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 the small parts into the air intake vents. It may
result in the malfunction of the projector.
RECOMMENDATION
We recommend avoiding dusty/smoky environments when
operating the projector. Use of the projector in these envi-
ronments may cause poor image quality.
When using the projector under dusty or smoky conditions,
dust may accumulate on a lens, LCD panels, or optical ele-
ments inside the projector. The condition may degrade the
quality of a projected image.
When the symptoms above are noticed, please clean up
the LCD panel and lens following to the “Cleaning
Method”.
Air filters
Circuit Protections
* Following information differs from the model LV-S3 ;
- the cabinet, the air filter 3pcs. --> 4 pcs.
NOTE:
When inserting the side air filter,
make sure that the dented part
of the filter is outside.
Summary of Contents for LV-S4
Page 1: ...Multimedia Projector SERVICE MANUAL Original Version FILE NO Model No LV S4 ...
Page 49: ... 49 BA9743AFV DC DC Converter IC371 IC Block Diagrams BA7078AF Sync Detector IC5301 ...
Page 50: ... 50 IC Block Diagrams LM4865 Audio Amplifier IC5003 PW168A Scaler Main CPU IC301 ...
Page 52: ...SERVICE MANUAL LV S4U LV S4E ...