Marantz PM8005 - Standby Led Flashes While Using Unit; The Power Turned On, but a Sound Does Not Output Normally

Check each connector
See 21 page (
z
1)(
z
2)
"The power can not be turned
on.
(STANDBY LED lights→ash)"
3. STANDBY LED FLASHES WHILE USING UNIT
(PROTECTION CIRCUIT IS SET)
4. The power turned on, but a sound does not output normally.
(Both channels)
4.1 STANDBY LED does not ash (protection mode is not set)
4.2 When the volume is turned up, Mute LED ashes. (protection mode is set)
Repeats ON/OFF for 0.5 second each, and automatically returns to normal operation.
Check input level and each
connector
Check each connector. Broken wire in MAIN TRANS.
Damaged power amplier circuit
Damaged Selector (
U3903
,
S3001
,
Q3045
)
Tone Circuit (
S2801 - 2804
,
Q2801
,
Q2803
,
Q2804
).
Damaged Mute circuit, U1001.
Check SPEAKER connection
and SPEAKER short, SPEAKER
resistance value.
Check whether power is
being supplied to the coil of
the MAIN TRANS.
Power not supplied.
Power supplied.
Power supplied.
When you turn up the volume again after the unit
automatically returns to normal operation and if the
protection circuit is activated, STANDBY LED will
repeat ON/OFF for 0.25 seconds each.
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