Hitachi P42A01 - Troubleshooting

TROUBLESHOOTING GUIDE
THE PICTURE DOES NOT
APPEAR (1)
Is CD3809 connected?
Connect CD3809.
Is there signal at
IC3901?
Change IC3901.
Yes
No
Yes
No
Is there signal at
IC4400?
Check IC4400 and
peripheral circuit.
Change SCALER PCB.
Is CP3904, CP3905
connected and is there
signal?
Connect CP3904, CP3905.
Caeck IC4400 and peripheral
circuit.
No
No
Yes
Yes
Is CP3904, CP3905
connected?
Connect CP3904, CP3905.
No
Yes
E-2