Mechanical Sensor Switches (Sw90, Sw6581) - Sanyo PLV-WF20 Service Manual

Circuit Protections
Mechanical sensor switches (SW902, SW6581)
This projector provides  mechanical sensor switches, the one is for filter cartridge sensor switch (SW6581) and the
other one is for lamp cover sensor switch (SW90). The filter cartridge sensor switch detects whether the filter car-
tridge is installed correctly. If the filter cartridge is not installed correctly, the projector cannot turn on.
The lamp cover sensor switch detects whether the lamp cover is closed securely. If lamp cover is opened or not
closed completely, the drive signal to the lamp circuit is cut off. After opening the lamp cover for replacing the lamp
ass'y, place the lamp cover correctly otherwise the projector cannot turn on.
Lamp cover sensor
switch (SW90)
The projector is shut down; and the LAMP indicator is lighting
and other indicators are blinking.
When the projector detects an abnormal condition (SW90, SW903, SW904
- opens, or SW6581 - opens), it will be automatically shut down to protect the
inside of the projector and the LAMP indicator lights on and other indicators
blink. In this case, unplug the AC power cord and check that the filter car-
tridge and lamp cover are installed securely, and the plug it, and turn on the
projector once again to verify operation. If the projector cannot be turned on
and these indicators are still lighting and blinking, unplug the AC power cord.
See the troubleshooting chapter.
cAutIoN
DO NOT LEAVE THE PROJECTOR WITH THE AC POWER CORD
CONNECTED UNDER AN ABNORMAL CONDITION. IT MAY RE-
SULT IN FIRE OR ELECTRIC SHOCK.
Filter cartridge sensor
switch (SW6581)
-6-
Filter cartridge
Indicators
LAMP indicator lights on
and other indicators blink.