Sony HT-MT500, Руководство по обслуживанию

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HT-MT500/MT501
35
SECTION 4
TROUBLESHOOTING
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
“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
Replace the IC6001 on the BAR-AMP
board. IC6001 on the BAR-AMP board is
burned out.
Yes
Yes
The voltage of the following is 3.3 V.
BAR-AMP board: CN6013 pin 14
(/SD)
The voltage of the following is 3.3 V.
BAR-AMP board: CN6013 pin 15
(DC-DET)
No
The voltage of the following is 12 V.
BAR-AMP board: IC6001 pin 2
No
Yes Yes
No
No
No
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.
Replace the IC6001 on the BAR-AMP
board.
Yes
Yes
Mounted parts on 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 short-circuits or opens.
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.
Repair the short-circuit and opening of
mounted parts.
Yes
Check and repair the area
surrounding IC6008 and transistor
(Q6006) on the BAR-AMP board.
Check and repair the area surrounding
IC6009 on the BAR-AMP board.
Replace the MB-1610 board.
Check and repair the connection cable
with speaker, check and replace the
speaker (SP1, SP2).