Sony HT-MT500, Руководство по обслуживанию

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HT-MT500/MT501
HT-MT500/MT501
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3. The sound is not outputted
4. Power is not turned on
Entering the “DEMO MODE” (touch
the [ ] button for five seconds),
and then the “DEMO MODE” sound
is outputted.
(Touch the [ ] button to release
the “DEMO MODE”)
The sound is not outputted.
No
Yes
Check the signal path for being inputted
to the IC101 on the MB-1610 board, and
then replace the defective part, or replace
the applicable board on which the
defective part is mounted.
Yes
The voltage of the following is about
17.5 V.
BAR-AMP board: IC6001 pin 29 to 31,
36 to 38 (PVDD)
Yes
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.
Check and repair the B+ line and
signal line of the IC6009 on the
BAR-AMP board.
Check and repair the area surrounding
transistor (Q6006) on the BAR-AMP board.
Check the fuse (F6001) on the BAR-AMP
board and if it damaged, replace the fuse
(F6001) on the BAR-AMP board.
No
Yes
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,
and then repair.
If there is no abnormality, replace the
IC6001 on the BAR-AMP board.
Power is not turned on.
Check the voltage of the following.
BAR-AMP board: CN6014
pin 1 is 13 V
pin 3, 4 are 5.2 V
pin 7 is 6 V
The voltage of the following is 3.3 V.
MB-1610 board: IC303 pin 4
Yes
Yes
Vibrator (X5001) on the MB-1610
board is oscillated after AC input.
Yes
Check and repair the area surrounding
IC6011 to IC6013 on the BAR-AMP board.
If there is abnormality, replace the BAR-
AMP board.
No
No
No
Replace the MB-1610 board.
The reset signal is inputted to pin
38 of IC5006 on the MB-1610 board
after AC input.
(It can check with the CN5002 pin
6 on the MB-1610 board)
Check the area surrounding IC5005 on
the MB-1610 board, and then replace the
MB-1610 board.
Yes
Yes
No
Replace the MB-1610 board.
No
Replace the MB-1610 board.
The voltage of the following is 5.2 V.
MB-1610 board: IC303 pin 5