Trouble Shooting; The Power Can Not Be Turned On; (Standby Led Does Not Light (Standby Mode)); (Standby Led Lights Flash) - Marantz PM8005 Service Manual

TROUBLE SHOOTING

1.

The power can not be turned on.

(STANDBY LED does not light (STANDBY MODE))

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.
2. The power can not be turned on.
(STANDBY LED lights
Check each connector.
Check whether power is
being supplied to the F8520.
Check whether power is
being supplied to the coil of
the MAIN TRANS.
Check whether power is
being supplied to the D8509
- 8518.
Power not supplied.
Broken wire in STANDBY
TRANS T8501.
Check whether power
is being supplied to the
Power supplied.
D8501-8506.
flash)
Power not supplied.
Broken FUSE F8520.
Power not supplied.
Broken wire in MAIN
TRANS.
Power not supplied.
Broken D8509 - 8518.
Power supplied.
STANDBY LED repeats ON/
OFF for 0.5 seconds each.
( z 1)
Check input level,
SPEAKER connection and
SPEAKER resistance value.
Power supplied.
STANDBY LED repeats ON/
OFF for 0.25 seconds each.
( z 2)
Power not supplied.
Power supplied.
21
Malfunction of D8501-8506.
Malfunction of
U8501,U1001.
Damaged DC OFFSET DETECT.
Damaged OVER HEAT DETECT.
Damaged OVER CURRENT
DETECT.
Damaged P_DWN detection
circuit and U1001.
Damaged power amplifier circuit
Damaged power circuit.