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Power source system 1
Indicator doesn't illuminate.
The product does not enter the
Check the STBY5.
stand-by mode.
Has the FUSE
YES
(F9F1)
blown?
INLET PCB ASS'Y
NO
Are
the PB-RB and
NO
RD-SD/TD connectors
inserted properly?
YES
Is the
YES
PB-RB or RD-SD/TD
lead wire broken?
NO
Is the
Remove the
voltage of the
NO
SD connector
pin No. 4 of the SD
from the MAIN
connector 5V?
PCB ASS'Y.
MAIN PCB ASS'Y
YES
Malfunction of the
MAIN PCB ASS'Y.
The terminal shield is allowed to be used as GND when the terminal voltages and the waveforms on the secondary side are checked.
(Don't use a heat dissipation board as GND.)
Check the failure on the POWER PCB
ASS'Y, then replace the parts.
(Especially, check D900, Q900, Q903,
Q904, Q905, and IC901.)
Note: These parts are not available.
Insert the connectors properly.
Replace the lead wire.
Note: The lead wire is not available.
IC950
: Primary side SW-IC
PC950
: Photo coupler for feedback
IC951
: Shunt regulator for feedback
Z952
: Circuit protector
Check around IC950, IC951,
Is the
NO
and PC950, and replace the
voltage of the pin No.
parts if necessary.
9 of the RD connector
(Especially check Z952. In
5V?
this case, IC952 and D950
POWER PCB ASS'Y
may have also been broken.)
YES
Note: These parts are not available.
Replace the
MAIN PCB ASS'Y.
Power source system 2
The lamp does not light.
Is the color wheel
rotating?
YES
Is a
pulsed waveform
present at the pin No. 36
(CWINDX) of the SB
connector?
YES
Are the
connectors and lead
wires connected properly between
the PCB-POWER and the
LAMP POWER
UNIT?
YES
Are the
connectors and lead
wires connected properly
between the PCB-MAIN and
the LAMP POWER
UNIT?
NO
Connect a 100 (1W) resistor between the pin No. 9 (STBY5) and the
pin No. 10 (AGND) of the RD connector on the PCB-POWER alone.
Then, short the pin No. 11 (STBY3.3) and the pin No. 5 (FAN ON) of
the RD connector. (Not that the connected resistor becomes hot.)
Are the
voltages of the pins
No. 1 to 3 of the RE
connector 390V?
POWER PCB ASS'Y
NO
Is the
voltage of the pin No. 8
of IC901 20V?
POWER PCB ASS'Y
YES
Malfunction of the PFC
circuit.
Check around IC901 and
Q900.
The terminal shield is allowed to be used as GND when the terminal voltages and the waveforms on the secondary side are checked.
(Don't use a heat dissipation board as GND.)
When measuring the voltage of the primary power source, use the (-) terminal of C904 for GND.
NO
Malfunction of the PCB-MAIN,
PCB-DMD, or color wheel.
NO
Malfunction of the PCB-CW,
PCB-DMD, or PCB-MAIN.
NO
Insert the connectors properly
or replace the lead wire.
YES
Insert the connectors properly
or replace the lead wire.
YES
Malfunction of the LAMP POWER UNIT.
NO
Check around Z900, Q901, Q902,
IC902 and PC951.
DPX-530
41
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