The Power Can Not Be Turned On - Marantz HD-DAC1 Service Manual

4.

The power can not be turned on

4.1. STANDBY LED lights -> flash.
Check each connector.
Check whether power
is being supplied to the
F902, F903, F904.
YES
Check whether power
is being supplied to the
coil of the MAIN TRANS.
YES
Check whether power
is being supplied to the
D912, D913, D914, D915,
D916, D917
4.2. STANDBY LED FLASHES WHILE USING UNIT
(PROTECTION CIRCUIT IS SET)
Check each connector
Power not supplied.
Broken FUSE F902, F903,
F904
NO
Power not supplied.
Broken wire in MAIN
TRANS.
NO
Power not supplied.
Broken D912-D917
NO
STANDBY LED repeats
Power supplied.
ON/OFF for 0.5 seconds
each.
Check the output of
Regulator.
IC92, IC93, IC94
IC95, IC96, Q905
Check the soldering or
replase WF94, CN94,
BN92, CN11, D925, D926,
D921, D927, D929, D930,
Q909, Q910, Q907, Q908,
Q914, Q915
Q911, R925, R926, L911,
R127, R117, R118, R119,
IC11
YES
NO
YES
See "4.1. STANDBY LED lights -> flash."
45
Check soldering or replace.
IC92, IC93, IC94
IC95, IC96, Q905