Sony HT-MT300, Руководство по обслуживанию

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HT-MT300/MT301
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3. Power is not turned on
Power is not turned on.
The voltage of the following is
19.5 V.
MAIN board: IC3208 pin 8
Replace the fuse (F3201) on the MAIN
board.
Replace the MAIN board.
Yes
Yes
Yes
No
IC2003 pin 3 on the MAIN board is
oscillating or not after AC input.
Fuse (F3201) on the MAIN board is blow.
No
No
No
Replace the vibrator (X2001) on the MAIN
board.
Replace the IC2003 on the MAIN
board, and check the power is turn
on.
Replace the MAIN board.
Yes
No
No
Replace the AC adaptor.
Reprogram the IC2000 (serial flash)
on the MAIN board, and check the
power is turn on.
The voltage of the following is 12 V.
MAIN board: IC3205 pin 1
Yes
USB cannot be detected.
The voltage of the following is 5.1 V.
MAIN board: IC3000 pin 1
Replace the MAIN board.
Replace the connector (CN6002) on the
JACK board.
Yes
Yes
Yes
Replace the IC2003 on the MAIN
board.
The voltage of the following is 3.3 V.
MAIN board: IC3000 pin 4 No
No
No
Refer to “3. Power is not turned on” on
above.
Check the coil (L3000) pin 1 and
pin 3 are shorted to ground.
Yes
4. USB cannot be detected