4-13
EMP-9000/8000
SEIKO EPSON Revision:A
Others
Figure4-11
Start
Noise problem? Suspect following defects.
Exhaust fan, inhale fan and fan on the power supply unit.
Power supply unit (Vibration noise from pulse transformer)
Suspect following defects.
Thermistor (LV, LAMP, PBS) or safety switch.
Exhaust fan, Inhale fan, Power supply unit fan.
Air filter (Dirt condition)
Suspect following defects.
Optical engine (May cause with dirt condition on the light guide unit, projection
lens unit and light valve on the optical head unit.)
Suspect following defects.
AC input(Include power line transit or distortion)
Power supply unit
MA board
Cable connection (fail to make condition.)
Overheat problem?
Image display problem?
Low reproduced problem?
YES
YES
YES
YES
NO
NO
NO
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