Lamp Cover Switch; Warning Temperature And Power Failure Protection - Sanyo PLV-Z4 Service Manual

●

Lamp cover switch

The lamp cover switch (SW8803) cuts off the drive sig-
nal to the lamp circuit when the lamp cover is removed
or not closed completely.
After opening the lamp cover for replacing the lamp
unit, place the lamp cover correctly otherwise the pro-
jector can not turn on.
● Door switches for automatic slide shutter
The projector provides 2 door switches against an acci-
dent of the automatic slide shutter.
The door switch-A(SW8801) turns ON when the slide
shutter is opened.
The door switch-B(SW8811) turns ON when the slide
shutter is closed.
If the slide shutter stops half-open after turning on, the
POWER indicator will blink orange and the projector
goes to stand-by mode after cooling. In this case,
press the POWER ON-OFF button again.
If the slide shutter is closed during operation, the pro-
jector is automatically turned off for safety.
In this case, be sure to check the position of the slide
shutter. After opening or closing the slide shutter man-
ually, press the POWER ON-OFF button and the pro-
jector turns on.
● 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 fol-
lowing possible causes and wait until the WARNING indicator stops flashing, and then try to turn on the projec-
tor.
- If the WARNING indicator lights red, it may defect the cooling fans or power supply circuits. Check fans opera-
tion and power supply lines referring to the chapter "Power supply & protection circuit" in the power Supply Lines
section.
Possible causes
- Air filters are clogged with dust particles. Remove dust from the air filters.
- 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)
LAMP COVER SWITCH
(SW8803)
Door switch-A
Door switch-B
- 6 -
LAMP COVER
Slide shutter