Zenith XBV613 - DVD/VCR Combination Service Manual page 56

D
Focus ON OK?
YES
Track On OK?
YES
Disc is play ?
YES
E
NO
Proper signals on A,B,C,D
of ZR36882
Check FE signal on
ZR36882
Check FOCUS_S signal
on ZR36882
NO
Normal TE Signal on
ZR36882?
Properly TRACK_S signal
on ZR36882?
TACT+ & TACT- output
properly?
Check cable connection on
pick-up head.
NO
Check RF signal waveform.
3-63
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check connections between
ZR36882 and pick-up head.
Check the FOCUS_S
connection on ZR36882
and motor driver.
Check the related
circuit on ZR36882
Check the TRACK_S
connection on ZR36882
and motor dirver.
Check the tracking control
amp circuit on motor driver.