Troubleshooting - Denon POA-3012CI Service Manual

TROUBLE SHOOTING
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FLOW CHART NO.1
The power cannot be turned on.
(Power indication LED dose not light)
Is the voltage of 6V supplied to C147?
YES
Is the voltage of 4V supplied to C150?
YES
Is the voltage of Hi (3.3V) output to 19 pins and 20 pins
of the microprocessor (IC701)?
YES
Trouble of LED(LD707).
FLOW CHART NO.2
Power is turned on, but FLD does not light.
Is 6V supplied to the coil of power supply relay RL101
and 102?
YES
Are fuse (F101, 102, 107, 109) normal?
YES
The power supply circuit of FLD or trouble of FL701.
T E
L 1 3 9 4 2 2 9 6 5 1 3
FLOW CHART NO.3
Power is turned on and FLD lights up, but sound is not output.
When all zone operation mode LED When zone operation mode LED which
flashes in red. the sound does not produce flashes in
red.
Trouble of power circuit or temperature Trouble of the power amplifier unit of
detector. ZONE flashing in red.
FLOW CHART NO.4
Using the PC, setting is not possible.
The screen of the setting is not displayed to the PC.
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NO
Disconnection of T101 or trouble of D101-104.
NO
Trouble of IC104.
NO
Trouble of IC701.
NO
Trouble of IC701 and TR101-TR104.
NO
Trouble of the transformer.
When Zone operation mode LED
lights normally.
(Green or an orange)
Trouble of input unit or audio
signal unit.
Trouble of communication unit.
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POA-3012CI
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