Sanyo DVR-V100E Service Manual page 11

TROUBLESHOOTING
b. AV1 E-E
No sound in AV1 E-E mode.
YES
Is 12V obtained at IC251 pin#34?
NO
YES
Is 5V obtained at IC251 pin#40?
NO
Is Audio signal at IC251 pin#6, 7?
YES
NO
Is Audio signal output at IC251
Are CLK and DATA obtained at
pin#16,17?
IC251 pin#42,43?
YES
NO
Is Audio signal output at IC602 pin
Check IC602.
#3, 13?
YES
Check Output JACK.
Check POWER circuit.
Check Input AV1 JACK
YES
Replace IC251.
18
c. AV2 E-E
No sound in AV2 E-E mode.
YES
Is 12V obtained at IC251 pin#34?
NO
YES
Is 5V obtained at IC251 pin#40?
NO
Is Audio signal at IC251 pin#8, 9?
YES
NO
Is Audio signal output at IC251
Are CLK and DATA obtained at
pin#19, 20?
IC251 pin#42,43?
YES
NO
Is Audio signal output at IC602
Check IC602.
pin #3, 13?
YES
Check Output JACK.
TROUBLESHOOTING
Check POWER circuit.
Check Input AV2 JACK
YES
Replace IC251.
19