Troubleshooting - Sony HT-MT500 Service Manual

1. "PRTCT", "PUSH" and "POWER" is displayed on the front panel display after turning the power on
"PRTCT", "PUSH" and "POWER" is
alternately displayed on the front
panel display after turning the
power on.
Yes
IC6001 on the BAR-AMP board is
burned out.
No
"PRTCT", "PUSH" and "POWER" is
alternately not displayed on the
front panel display, when removing
the speaker connection connector
(CN6010, CN6011) on the BAR-
AMP board and turning the power
on.
No
The voltage of the following is 3.3 V.
BAR-AMP board: CN6013 pin 14
(/SD)
No
The voltage of the following is 12 V.
BAR-AMP board: IC6001 pin 2
No
Check and repair the area
surrounding IC6008 and transistor
(Q6006) on the BAR-AMP board.
SECTION 4

TROUBLESHOOTING

Yes
Replace the IC6001 on the BAR-AMP
board.
Check and repair the connection cable
Yes
with speaker, check and replace the
speaker (SP1, SP2).
The voltage of the following is 3.3 V.
Yes
BAR-AMP board: CN6013 pin 15
(DC-DET)
No
Check the OUT_A (pin 39, 40), OUT_B
(pin 35), OUT_C (pin 32) and OUT_D
(pin 27, 28) lines of IC6001 on the BAR-
AMP board do not short-circuits or opens.
If there is no abnormality, check and repair
the area surrounding transistor (Q6004,
Q6005) on the BAR-AMP board.
Mounted parts on the OUT_A (pin 39, 40),
Yes
OUT_B (pin 35), OUT_C (pin 32) and
OUT_D (pin 27, 28) lines of IC6001 on the
BAR-AMP board short-circuits or opens.
No
The PWM signal is inputted INPUT_A
(pin 5), INPUT_B (pin 6), INPUT_C
(pin 14) and INPUT_D (pin 15) lines of
IC6001 on the BAR-AMP board.
No
Check and repair the area surrounding
IC6009 on the BAR-AMP board.
HT-MT500/MT501
Yes
Replace the MB-1610 board.
Yes
Repair the short-circuit and opening of
mounted parts.
Yes
Replace the IC6001 on the BAR-AMP
board.
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