7-14
Check the digital audio
setting
Proper vcc of DOL3 (jack PCB)
Check optical and coaxial output terminal
and passive components aroud them
Refer to user manual
No
Checking
Check Vcc Line
Proper signal input on DOL4
No
No
Proper signal on DOL1
Replace DOL1
Yes
Yes
Yes
Skip setting check (hardware problem)
No digital audio out
Proper signal on 10 pin of CN1
of Jack PCB
No
Replace digital main PCB
Voltage of L802 is 9V
(jack PCB)
Check the pin #13, #20
IC501(Jack PCB) is LOW
Check the passive components
ardund jack pin
Power block
No
No
Check IC501 #3pin Sdata
Is trere a Output on C837,
C836(Jack PCB)?
No
No
Check the board to board connector
between jack PCB and main PCB
Yes
Yes
Yes
No Analog Audio Output
Is trere a signel on
C191, C196?
Replace main board
Yes
Replace Jack board
www . x ia o y u 1 6 3 . c o m
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2
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T E L 1 3 9 4 2 2 9 6 5 1 3
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2
8
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4
2
9
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1
5
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Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
