Kenwood DVF-3080-S Service Manual page 13

B
Does
the SLED move Motor
No
to inner side when it is at Driver DRVSB
outer position Pin is High?
on?
Motor
Yes
Driver DRVSB
Pin is High?
SLED+
and SLED- output
properly ?
Do not put in disc and tray
Check the cable connection
close.
with MECHA.
Optical
No
Lens has movements Proper Focus outputs
for searching
to motor driver?
Focus?
yes
Proper F+
& F- outputs?
Check cable connect on with
pick-up head.
C
No
Check the connection line of
DRVSB signal
Yes
No
Check the related circuit of
FOCUS.
Yes
No
Check the amp circuit on
motor driver.
Yes
No
Check Focus connection on
M3355 and motor driver.
Yes
No
Check the amp circuit on
motor driver.
Yes
C
Laser turns on when LD01 or LD02 output
reading disc?)
properly?
Yes
Yes
Collector
voltage of power
transistor is OK?
( Q201, Q202)
Yes
Check cable connection between
transistor output and pick-up head.
No
Put disc in? Laser off
Yes
No
Disc ID is correct?
Proper RF signal?
Yes
Check the RF connection
between MD and M3355.
No
Proper
Does spindle rotate? Spindle signal on
M3355
Yes
Yes
Proper RF signal?
Yes
Check the RF connection
D
between MD and M3355.
No
Check the laser power circuit
on M3355 and connecting to
power transistor. (Q201, Q202)
No
Check the related circuit on
laser power TR
No
Check the related circuit
on M3355 RF signal
Yes
No
Check spindle related
circuit on M3355
No
Check the related circuit
on M3355 RF signal