Zenith XBV243 Service Manual page 29

TROUBLESHOOTING
1. µ-COM Circuit
A. Audio abnormal
AUDIO ABNORMAL
Check Audio jack.
YES(If OK)
Check MPEG_CLK Signal
of MPEG part.
YES(If OK)
Refer to Audio part.
YES(If OK)
Refer to MPEG part.
YES(If OK)
Replace B/D.
C. Open/Close abnormal
Check the connection of MD.
YES
VR168 - 923-03485
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ELECTRICAL
OPEN/CLOSE ABNORMAL
Check Front.
Check the
connection of PMD03.
NO
Check IC501 Pins 13, 14.
YES
Refer to SERVO part.
3-17
B. Video abnormal
VIDEO ABNORMAL
Check Video jack.
YES(If OK)
Refer to Video part.
YES(If OK)
Refer to Encoder part.
YES(If OK)
Refer to MPEG part.
YES(If OK)
Replace B/D.
YES(If OK)
NO
YES
Reconnect it.
D35E COMBO - ELECTRICAL