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Power source system 3
NO
YES
NO
YES
YES
NO
YES
Malfunction of the the MAIN PCB ASSY.
Connect the lead wires correctry,
or replace them.
The lamp does not light.
Does the lamp light?
NO
Remove the MAIN PCB ASSY and
connect the LAMP JIG.
Turn on [FAN-ON], and [LAMP-ON] of the
LAMP JIG.
Remove the RE-CN1 lead wire and
turn on [FAN-ON] of the LAMP JIG.
Is the voltage between
the pins No. 1 and No.
3 of the RE connector
370 V?
Malfunction of the LAMP
POWER UNIT.
Check the circuit around
Z900, IC900, and PC901.
Is the voltage of the
pin No. 10 of IC9M0
17.5 V or more?
Malfunction of the PFC circuit.
Check the circuits around
IC9M0, Q900, Q901, and Q902.
POWER PCB ASSY
Is the lead wire or
connector between the
POWER PCB ASSY and
LAMP POWER UNIT
OK?
POWER PCB ASSY
The
terminal shield
can be used as GND when the terminal voltages and the waveforms on the
secondary side are checked.
(Do not use a heat dissipation board as GND.)
When measuring the voltage on the primary side, use the negative (-) terminal of C903 as GND.
Содержание LC62 CHASSIS XL6500LU
Страница 22: ... 4 PCB LOCATION Fig 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ...
Страница 108: ... MEMO ...
Страница 119: ...P XL 00LU XL 00U ...
Страница 123: ...P XL 00LU XL 00U ...
Страница 130: ...P 12 XL 00LU XL 00U ...