TROUBLESHOOTING GUIDE
Is there signal at pins
113, 114, 115 and
116 of IC4001?
Is there signal at pins 1
and 7 of IC8501?
Check pins 1 and 7 of IC8501
and peripheral circuit.
Yes
NO SOUND DVD/CD ANALOG
AUDIO
No
Change MAIN PCB.
Change IC4001.
Connected CD8501.
Is there signal at pin1
of CP8501?
Is there signal at
pin122 of IC4001?
Check line circuit IC4001
to CP8501.
Yes
NO SOUND DVD/CD DIGITAL
AUDIO
No
Change IC4001.
Yes
No
No
Yes
No
Yes
Change MAIN PCB.
Does CD8501 connected?
E-9
19DV550P/19DV551P