Zenith XBV243 series 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
ELECTRICAL
OPEN/CLOSE ABNORMAL
Check Front.
Check the
connection of PMD03.
NO
Check IC501 Pins 13, 14.
YES
Refer to SERVO part.
B. Video abnormal
VIDEO ABNORMAL
Check Video jack.
Refer to Video part.
Refer to Encoder part.
Refer to MPEG part.
Replace B/D.
YES(If OK)
NO
YES
3-17
YES(If OK)
YES(If OK)
YES(If OK)
YES(If OK)
Reconnect it.
D35E COMBO - ELECTRICAL