Sony RDR-VX500 Service Manual page 114

No Analog Audio Output
No
Voltage of L802 is 9V
(jack PCB)
Yes
Check the pin #13, #20
No
Check IC501 #3pin Sdata
IC501(DVD main PCB) is LOW
Yes
Is trere a Output on C837,
No
C836(Jack PCB)?
Yes
Check the passive components
ardund jack pin
Check the board to board connector
between jack PCB and main PCB
Power block Replace Jack board
No
Is trere a signel on
Replace main board
C191, C196?
Yes
No digital audio out
Checking
Check the digital audio
Refer to user manual
setting
Skip setting check (hardware problem)
No
Proper vcc of DOL3 (jack PCB) Check Vcc Line
Yes
No
Proper signal on pin 36 of CN3
Proper signal input on DOL4
Yes
No
Replace DOL1
Proper signal on DOL1
Yes
Check optical and coaxial output terminal
and passive components aroud them
No
Replace main PCB
of main PCB