Epson EMP-822 Service Manual page 24

Component name
Sensors Foot Detection
Lens Shutter Detection Sensor
(Mechanical Contact Switch)
Foot Detection
Assy.
(EMP-X5 only)
Lamp Fan
Speaker
(EMP-X5/S5 only)
SEIKO EPSON
EMP-822/EMP-83/EMP-X5/EMP-S5
EMP-X5 has an auto keystone correction function. It uses a mechanical device
to measure the amount of protrusion of the Front Foot to detect the tilting level
of the projector. The device detects only four predetermined points. If the auto
correction does not adjust the distortion enough, you can make further correc-
tion manually.
The switch using a mechanical contact to detect the status of the Lens Shutter.
The "Closed" status is detected when the protrusion of the shutter for detection
pushes the switch to close the contact. On the "Closed" Status:
the solid black is displayed.
the audio output switches to the A/V mute mode.
the Lamp turns to the Low Brightness mode.
Intake Fan A
Intake Fan B
RC Board
L/V (R/G/B)
Figure 2-3. Control Circuit Connecting Diagram
2-5
Function
Shutter Switch
PS Ballast (SCI)
Switch Panel
PS Ballast
(Power)
EX Fan
TH Board
Lamp Lid
Detection SW
P/S Fan
P/S Thermistor
Revision:A