Zenith DVB413, Service Manual

Page: 17 / 75

3-8
Focus ON OK?
D
Yes
Proper
signals on A, B, C,
D of M3355
Check the related circuit
on M3355 SBAD signal .
No
No
Check the related circuit
on M3355
.Proper SBAD signal
on M3355?
Check connections between
M3355 and pick-up head.
Track On OK?
Check cable connection on
pick-up head.
Proper tracking signal
on M3355?
Proper
M3355 track signal
on M3355?
Check the related
circuit on M3355
Check the track connection
on M3355 and motor driver.
Yes
No
E
. Proper FE signal
on M3355?
Check the related circuit
on M3355 FE signal
Disc is play?
T+ & T- output
properly?
Check the tracking control
amp circuit on motor driver.
Check RF signal waveform.
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
No