EMP-9000/8000
2-4Revision:A SEIKO EPSON
2.1.2. Electrical System
Electrical units of EMP-9000/8000 are physically connected mainly to the Main board Assy
unit as shown figure 2-1. The function outline of each circuit system unit is shown below table.
2.1.3. Optical System Connections (Optical Engine)
The optical systems consists of 5 blocks (Intake fan, Light guide unit, Optical head (Light valve
R/G/B)/Prism unit, and Projection lens unit) as shown next page. These units and Driver
board Assy are specified as Optical engine and it is one replaceable part.
In addition to the five items, FC board is attached at the rear of light guide unit. It relay the
switch signal on the lamp inner housing (FUSE board Assembly) to the Driver board Assy. 1. It
is therefore independent of the optical functions.
Unit name function outline
1. Main board Assy unit Power (DC voltage generation) ON/OFF, The ballast power
supply (for light source lamp) On/Off, Circuit reset, Air cool-
ing fan control, The temperature detection (protect overheat
condition), Store the display data, The display control (resiz-
ing etc.), Display data and timing signals generation, condi-
tion lamp (LED indicator) display, Audio signal control,
Remote controller /operation panel control, Mouse control,
Relay the DC power supply hook up, BNC interface connec-
tor,
2. Driver-board Assy
(optical engine)
Display compensation data preservation, Read out the dis-
play data, Digital to analog coversion (D/A), Light valve (liq-
uid crystal panel) drive signal generation, Bias generation for
the light valve
3. IF unit Display data input/output, Interface connector, Audio input/
output interface connector, interface connector, Mouse/Com
interface connector.
4. AU board Assembly Audio control, Amplifier
5. RC receptor board Assembly
(The front/the back)
Infrared ray signal receiving of the remote controller, Serial
data transmission
6. Operation panel Switch (the matrix) signal generation
7. Connector board L Assy Hook up of the exhaust fan power and the RC receptor board
assembly (the rear) signal
8. Connector board U Assy Pin point of contact connector for the joint with the connector
board L Assy unit, Cable connector with the AU board
assembly.
9. FC board assembly Signal relay to the FUSE board assembly
10. FUSE board assembly Fuse on the lamp inner housing (Fuse for the new article
detection)
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