Sanyo PLC-XT11, Service Manual

Page: 7 / 104

-7-
Circuit Protections
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Warning temperature and power failure protection
The projector will be automatically turned off when the internal temperature of the projector exceeds the normal oper-
ating temperature, or the cooling fans stops, or the power supplies in the projector are failed.
- If the TEMP WARNING indicator (red) is flashing, it may detect the abnormal temperature inside the projector.
Check the following possible causes and wait until the WARNING TEMP indicator flashing stops, and then try to
turn on the projector.
- If both of the TEMP WARNING (red) and READY (green) indicators are flashing at the same time, It may defect the
cooling fans and power supply circuits. Check fan operation and power supply lines referring to the chapter “Power
supply & protection circuit” in the Chassis Block Diagram section.
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)
Air filter care and cleaning
The removable air filters prevent 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 them upward.
3.
Clean the air filters with brush or wash out the dust and
particles.
4.
Replace each air filter properly. Make sure that the air
filters are fully inserted.
CAUTION:
Do not operate the projector with the air filter removed. The
dust is stuck on the LCD panel and the mirror, and it may
spoil the fine picture image.
Do not put the small parts into the air intake vents. It may
result in the malfunction of the projector. The air filters are
small parts. Take care that children don’t eat or swallow it.
RECOMMENDATION
We recommend not to use the projector in dusty, smoky places. Using it in dusty place may cause the poor picture
quiality.
When using under the dusty or smoky conditions, dust may accumulate on the LCD panel and lens inside it, and
may resultantly be projected on the screen together with the picture.
When the above symptoms are noticed, please clean up the LCD panel and lens following to the “Cleaning
Method”.
Air filters