Zenith DVB413 Service Manual page 15

B
Does
the SLED move
to inner side when it is at
outer position
on?
Yes
Do not put in disc and tray
close.
Optical
Lens has movements
for searching
Focus?
yes
C
Motor
No
Driver DRVSB
Pin is High?
Motor
Driver DRVSB
Pin is High?
SLED+
and SLED- output
properly ?
Check the cable connection
with MECHA.
No
Proper Focus outputs
to motor driver?
Proper F+
& F- outputs?
Check cable connect on with
pick-up head.
No
Check the connection line of
Yes
No
Yes
No
Yes
No
Yes
No
Yes
DRVSB signal
Check the related circuit of
FOCUS.
Check the amp circuit on
motor driver.
Check Focus connection on
M3355 and motor driver.
Check the amp circuit on
motor driver.