Mitsubishi SD200U, Service Manual

Page: 43 / 108

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Power source system 3
YES
NO
YES
NO
PB connector : PCB POWER
SE, SA connector : PCB SIGNAL
RC connector : PCB POWER SUB
CN1, CN2 connector : LAMP POWER UNIT
YES
Malfunction of LAMP POWER UNIT.
Insert or replace them.
YES
NO
YES
YES
YES
NO NO
Check the circuit around
IC9001 (PCB PFC).
Check the PCB PFC is
inserted firmly.
Check the circuit around
IC9000 (PCB PFC).
Check the PCB PFC is
inserted firmly.
The lamp does not light.
Are CN1 (PCB POWER,
LAMP POWER UNIT) and
SA-CN2 (PCB SIGNAL,
LAMP POWER UNIT)
connectors OK?
NO
Are the pins No. 1
to 6 of the PB
connector 370V?
Are the pins No. 8
to 6 of the PB
connector 20V?
Are the pins No. 9
to 6 of the PB
connector 18V?
Are the pins No. 1
to 3 of the RC
connector 3.3V?
Are the pins
No.10 to 6 of the PB
connector 10V or
more?
Is the pin No. 3
of the SE
connector 3.3V?
NO
Check the circuit around
D952.
Malfunction of PCB SIGNAL
Malfunction of PCB FAN
Check the circuit around PC951.
When measuring the voltage of the primary power source,
use (-) terminal of C907 for GND.