Yamaha DPX-530, Руководство по обслуживанию

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