MAXDATA Belinea 101725, Руководство по обслуживанию

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Troubleshooting
111707 Service Manual 16
4-3 No Sound
Check Phone Jack(J400)
Signal.
NO
Dose proper DC 12V appear at
pin 15,16 of U400(TDA7496)
NO
Dose proper signal output
appear at pin 14, 17 of U400
NO
YES
YES
YES
Check Phone Jack(J400)& Stereo
Cable.
Check Combo board and combo
harness
Check U400 and related circuit of
U400
Dose proper signal output
appear at pin 1,3 of CN401
NO
YES
Check CN401 and related circuit of
CN401
Check Speaker Wire and Speaker