Sanyo PLV-Z2000 Service Manual page 84

Troubleshooting
Indicators
• • • lights green.
• • • flashes orange.
From previous page
WARNING (red) and
POWER (red) indicators
are flashing?
No
POWER (red) and LAMP
REPLACE
(yellow) indicators are
flashing?
No
POWER indicator is
flashing orange?
Shutter Error at 3 cases;
(1) Error when turning on:
Flashing orange (continua-
tion).
(2) Error when turning off:
Flashing red (60sec.), flash-
ing orange (60sec.), and
then lighting red.
(3) Error at normal mode:
Flashing red (60sec.) and
then lighting red.
• • • flashes green.
• • • flashes yellow.
Troubleshooting
The symptom indicates that the projector detected an
abnormal temperature risen inside the projector. Check
the air filters and remove the object near the intake and
Yes
exhaust fan openings, and wait until the POWER indica-
tor stops flashing, and then try to turn on the projector.
-
The internal temperature is monitored by the sensors,
IC8841 on Main Board, TH901 and TH902.
(Refer to "Fan control circuit")
Yes
The symptom indicates that the projector detected an
abnormality in the lamp driving signal. Check the lamp
driving signal, Lamp Cover SW and the Thermal SW.
- LAMP_ON signal (Lamp-on:L) from pin 8 of IC4801 is sent
to Lamp Ballast Unit through SW8803(Lamp Cover SW) .
TXD1 signal is output from pin 445 of IC301 and sent to
Lamp ballast Unit via IC4833.
(TXD1 signal is applied for lamp power control. Lo: Low
power, Hi: High power)
- RXD1 signal (Lamp status signal) is output from Lamp
Ballast Unit and sent to pin 356 of IC301 via IC4833.
If an abnormality occurred on the lamp ballast unit, RXD1 sig-
nal and then the projector will be cooled down and to stand-
by mode (POWER indicator lights red).
Lamp Cover Switch (SW8803 on Lamp SW board)
Make sure that the lamp cover is mounted correctly. If not or
the lamp cover removed, the lamp does not light on for the
safety. Check the lamp cover and lamp cover switch.
Thermal Switch (SW902) ......short in normal
Yes
SW902 opens when the surrounding temperature of the
switch exceeds 100°C.
The symptom indicates that the projector detected an
abnormality in the slide shutter. Check the slide shutter
and the door switches.
Door Switches (SW8801/SW8811 on Door SW-A/B
board)
Make sure that the shutter is open or close. If it is half-open
or close, the lamp does not light.
• • • lights red.
-84- -84-
• • • flashes red. • • • off