No Sound - Sankey CLCD-2630 Service Manual

5. NO SOUND

Open the outer audio in-put signal
Confirm U6(msp3415)
1． Power supply all right
2． Reposition all right
3． Crystal all right
Confirm U6(msp3415)
Pin37/Pin38/Pin40/Pin41
audio signal in-put
Confirm U1/U2(4052)
1. Right power supply
2. Right control
Check all audio input network
No Sound
Check if using the right audio in-put signal
Confirm U6 (msp3415)
Pin26/ Pin27 audio signal
in-put
Re-joint R48/R49
- 27 -
Check the volume state, mute
Check the power supply U7(TDA7265)
Confirm U7(7265)Pin5＜17V
Confirm U7 Pin7/Pin 11 audio
signal in-put
earphone AV8
Confirm if there is output in
Check speaker
Replace speaker
Volume up
Close U7(7265)
1. Mute
2. ST-BY
Replace AV8