Denon PMA-720AE - Before Use; Starting Playback

13
TROUBLE SHOOTING
1. The power can not be turned on.
(
Power indication LED does not light.
）
2.2. Power indicator LED remains ashing red and muting mode is not canceled (protection mode is set).
2.3. Set operates, but then power indicator LED ashes red (protection mode is set).
Check the insertion of the
CUP12451-2 POWER B'D.
Check each connector.
Check the ashes
cycle of the red LED.
Check the ashes
cycle of the red LED.
Check the insertion of the
CUP12450 MAIN B'D
Check whether power is
being supplied to the coil
of the standby transformer
(T901).
Check whether power
is being supplied to the
FUSE F901
.
Broken wire in standby
transformer (T901).
Broken FUSE F901
.
Damaged power
amplier circuit
Damaged power
amplier circuit
No problems.
For proper heat dispersal,
do not install this unit in a
conned space.
Malfunction of
D941-946.
Broken wire in main
transformer.
Check whether power
is being supplied to
the D941-946
.
Check whether power
is being supplied to
the coil of the main
transformer.
Damaged temperature
detection circuit.
Damaged temperature
detection circuit.
Switch off power at
once, and re-apply
the power after the
body temperature
has fallen sufciently.
Malfunction of
IC41,IC43.
Malfunction of
IC41,Q454,RY92.
Power not supplied.
Power not supplied.
Power not supplied.
Power not supplied.
Power supplied.
Power supplied.
Power supplied.
Power supplied.
Flashes in cycles of 0.5 seconds
(0.25 seconds lit, 0.25 seconds off)
Flashes in cycles of 0.5 seconds
(0.25 seconds lit, 0.25 seconds off)
Flashes in cycles of 2 seconds
(1 second lit, 1 second off)
Flashes in cycles of 2 seconds
(1 second lit, 1 second off)
Green LED lit
Red LED ashes
2. The power turned on, but a sound does not output normally. (Both channels)
2.1. Set remains in standby mode.