Philips DVD634 Service Manual page 21

Diagnostic Software, Trouble Shooting and Test Instructions
5.3.5 No Digital Audio Out
No Digital audio out
from coaxial
Put the Mains switch to ON and play a
DVD disc.
Ensure that SPDIF set-up in the Setup
Menu is set to PCM.
Check
waveform at
Pin 41 / 7101
Mpeg Board
YES
Check
waveform at
output of buffer
IC 7202
YES
•
Check continuity from output of IC
7202 to pin 3 of con 1203A
•
Check /Replace R3253,R3254 and
C2242
•
Check / Replace Decoder IC 7101
NO
•
Check +5VAV supply to buffer IC
7202
NO •
Check / Replace buffer IC 7202
Figure 5-5 No Digital audio out
DVD634 /0X1
SPDIF
PM3380B
ch1
1
CL 26532068_022.eps
030702
5. EN 21
2.00 V / DC
0.0 ns / div