Sony RDR-VX500 Service Manual page 120

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
No audio on line input mode or
recorded disc playback
Check select signal of
No
check pin63, 64 (input select)of IC801
pin44, 46, 56, 58 in IC801
(jack board)
Yes
No
Check pin56 of IC801,pin17
Check SMPS board
of CN1 in jack board
Yes
Check all the vcc of
No
IC501, IC502 Replace main PCB
(main board)
Yes
Check passive components
around jack-pin and IC801