Marantz PM8005 - TROUBLESHOOTING GUIDE; Common Fault Diagnosis

TROUBLE SHOOTING
1. The power can not be turned on.
(STANDBY LED does not light (STANDBY MODE))
2. The power can not be turned on.
(STANDBY LED lights ash)
Check insertion of the
8U-
110151-7/-8
STANDBY
PCB.
Check insertion of the
8U-
110151-1
U-COM UNIT.
Check whether power is
being supplied to the coil
of the STANDBY TRANS
T8501
.
Broken wire in STANDBY
TRANS
T8501
.
Malfunction of
D8501-8506.
Check whether power
is being supplied to the
D8501-8506
.
Malfunction of
U8501
,
U1001
.
Power not supplied.
Power supplied.
Power not supplied.
Power supplied.
Check whether power is
being supplied to the
F8520
.
Check each connector.
Check whether power is
being supplied to the coil of
the MAIN TRANS.
Check whether power is
being supplied to the
D8509
- 8518
.
Broken
D8509 - 8518
.
Broken wire in MAIN
TRANS.
Broken FUSE
F8520
.
Damaged P_DWN detection
circuit and
U1001
.
Damaged DC OFFSET DETECT.
Damaged OVER HEAT DETECT.
Damaged OVER CURRENT
DETECT.
STANDBY LED repeats ON/
OFF for 0.5 seconds each.
STANDBY LED repeats ON/
OFF for 0.25 seconds each.
Damaged power amplier circuit
Damaged power circuit.
Power not supplied.
Power not supplied.
Power not supplied.
(
z
1)
(
z
2)
Power supplied.
Power supplied.
Check input level,
SPEAKER connection and
SPEAKER resistance value.
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