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Power source system 3
The lamp does not light.
Are CN1 (PCB POWER,
LAMP POWER UNIT) and
SA-CN2 (PCB SIGNAL,
LAMP POWER UNIT)
connectors OK?
YES
Are the pins No. 1
to 6 of the PB
connector 370V?
NO
Are the pins No. 8
to 6 of the PB
connector 20V?
YES
Are the pins No. 9
to 6 of the PB
connector 18V?
YES
Are the pins No. 1
to 3 of the RC
connector 3.3V?
YES
Are the pins
No.10 to 6 of the PB
connector 10V or
more?
YES
Check the circuit around
IC9000 (PCB PFC).
Check the PCB PFC is
inserted firmly.
Insert or replace them.
NO
Malfunction of LAMP POWER UNIT.
YES
Check the circuit around
NO
D952.
Check the circuit around
IC9001 (PCB PFC).
NO
Check the PCB PFC is
inserted firmly.
Is the pin No. 3
of the SE
NO
connector 3.3V?
Check the circuit around PC951.
NO
When measuring the voltage of the primary power source,
use (-) terminal of C907 for GND.
PB connector
: PCB POWER
SE, SA connector
: PCB SIGNAL
RC connector
: PCB POWER SUB
CN1, CN2 connector : LAMP POWER UNIT
- 4 -
Malfunction of PCB SIGNAL
NO
Malfunction of PCB FAN
YES
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