Zenith XBV 443, Service Manual

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3-15
6. Hi-Fi CIRCUIT
(1) No Sound(EE Mode)
YES
No Sound.
Check the SIF.IN of IC801 Pins57.
Check the DVD Audio of IC801
Pins12, 74.
Check the AV1 Audio of IC801
Pins11, 73.
Check the AV2 Audio of IC801
Pins9, 71.
Check the Vcc of IC801 Pins3, 5, 15,
32, 36, 46, 54.
YES
Check the IIC Clock and DATA at
IC801 Pins37, 38.
YES
Check the Audio of IC801 Pins78, 80.
YES
Check the Audio of C804, C854.
YES
Check the JK601.
Check the TU701 SIF Pin13.
NO
Check the DVD MODULE.
(PMD02 Pins13, 15).
NO
Check the Rear Jack.
(JK601 Audio in).
NO
Check the front Jack.
Timer (JK602, JK603).
NO
Check the Power 5.2V, 5.3VA, REG 9V.
Q701, PMP01 Pins1, 2, 5, 6.
YES
NO
Check the IC501 Pins71, 72.
NO
Replace IC801.
Replace C804, C854.
NO
NO