Denon PMA-1600NE Service Manual page 44

TROUBLE SHOOTING
1. The power cannot be turned on (Power indicator LED is not lit)
AC PCB
Check insertion of the connector.
POWER SW PCB
Check insertion of the connector.
DIGITAL PCB
Check insertion of the connector.
Check that voltage is supplied to the STANDBY
TRANS [T101] coil.
Check that voltage is supplied to the [D8508 :
cathode]
Check that voltage is supplied to [N631 : 5pin]
Check that voltage is supplied to [C101]
Check that voltage is supplied to the [Q105 : col-
lector]
Check that voltage is supplied to [U103 : 4pin]
Malfunction of [U102].
NG
Broken wire in STANDBY TRANS [T101]
NG
Malfunction of [D101 - D104].
NG
Malfunction of [U8501].
NG
Malfunction of [D105, D106].
NG
Malfunction of [Q102, Q105].
NG
Malfunction of [U103].
2. The power cannot be turned on (Power indicator LED lights flashes)
Check insertion of each connector.
YES
Check that voltage is supplied to [F101]
YES
Check that voltage is supplied to the MAIN TRANS
coil
YES
Active
Check that the voltage of 16V Check that voltage is supplied
PROT is active. [N1410 : 13pin] to the [C5107, C5108]
Hi Hi → Lo
Check that voltage is supplied to
the [D1201 : Cathode]. (C1201)
Active
Check that the voltage of M_B_
Check that voltage is supplied
DOWN is active. [Q104 : Collec-
to the [D8509 : cathode]. (C8516)
tor]
Hi Hi → Lo
Check that voltage is supplied
to [C8519]
Check that voltage is supplied to
[N1011 : 10pin] (U8503 output)
44
NG
Blown fuse
NG
Blown MAIN TRANS
NG
Malfunction of [D5100].
YES
NG
Malfunction of [D1201, D1202].
YES
NG
Malfunction of [D8509, D8510,
D8523, D8522].
YES
NG
Malfunction of [D8511, 8512].
YES
NG
Malfunction of [U8503].
YES
Go to next page.