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6-6
Check select signal of
pin5, 14, 2, 15 in IC203
(jack board)
Check pin16 of IC203,pin2
of CN101 in jack board
Check passive components
around jack-pin and IC203
check pin9, 10 (input select)of IC203
No
No
Check SMPS board
Check all the vcc of
IC502, IC504
(Jack board)
No
Replace Jack PCB
Yes
Yes
Yes
No audio on line input mode
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299