Hi-Fi Circuit - Zenith ZRY-316 Manual

VCR ELECTRICAL TROUBLESHOOTING GUIDE

5. Hi-Fi CIRCUIT

(1) No Sound(EE Mode)
No Sound.
YES
Check the AV1 Audio of IC801
Pins9, 14.
Check the AV2 Audio of IC801
Pins10, 15
Check the DVD Audio of IC801
Pins2, 4.
Check the 74 Audio of IC801
Pins48.
Check the Vcc of IC801 Pins25, 40, 51,
58.
Check the IIC Clock and DATA at
IC801 Pins42, 43.
Check the Audio of IC801 Pins53, 57.
Check the Audio of PMD02 Pin19, 21.
Check the Audio of PMD02 Pin23, 25.
Check the SC901, JK601.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
Check the Power 5.0V, 12V.
NO
NO
Check the IC501 Pins71, 72.
NO
NO
Check the Pcb Pattern between IC801
Pin53, 57 with PMD02 Pin19, 21.
NO
Check the DVD Board Audio path.
3-15
Check the AV1 Jack.
Check the AV2 Jack.
Check the DVD Audio out.
Check the Tuner Part
Replace IC801.