Troubleshooting - Marantz DV9500 Service Manual

10. TROUBLESHOOTING

1. Power Supply PCB (P801)
1.1 The power cannot be turned on.
Is the E+6V voltage line (J808) normal?
Is the control signal of J305 (10pin)
normal? STB_CTRL=H
Is the each voltage line normal?
+12V, +8V, +5V_D2, D+4V, -27V,
DC+3.5V and HEATER
OK
OK
NG
• Check the fuse (F801) has not blown
out.
• Check the voltage inputted/outputted to
each pin of Q801, Q802 and Q803.
Note: When checking the primary circuit,
the GND of a measuring instrument
should be switched floating.
NG
Refer to "3.1 Check the panel
microprocessor".
NG
Check the voltage inputted/outputted to
each pin of the connected components.
38