Kenwood DVF-5400-B, Service Manual

Page: 9 / 34

9
D
VF-5400
NO NO
YES
Check the connection line of
MUTE signal.
NO
YES
Check the related circuit of
FMSO.
NO
YES
Check the amp circuit on
motor driver.
Check the cable connection
with MECHA.
Do not put in disc and
tray close.
YES
YES
Check cable connect on
with pick-up head.
YES
YES
Motor
driver MUTE pin
is high?
Is SLED_S
DC Level higher than
1.65V?
SLED+
and SLED- output
properly?
Does the
SLED move
to inner side when it is at
outer position?
NO NO Check FOCUS_S connection
on ZR36888 and motor driver.
Proper
FOCUS_S outputs to
motor driver?
NO
Check the amp circuit on
motor driver.
Proper
FACT+ & FAC
toutputs?
Optical Lens has
movements for searching
Focus?
B
C
NO NO
YES
YES
Check the laser power circuit
on ZR36888 and connecting
to power transistor.
Check cable connection
between transistor output
and pick-up head.
NO
Laser off
NO
NO
YES
Check the related circuit
on ZR36888 RFL signal.
Check LD_DVD &
LD_CD signal
YES
YES
NO NO
YES
Check SPINDLE_S related
circuit on ZR36888.
NO
YES
Check the spindle control
amp circuit of motor driver.
Check the cable connection
between spindle and main
PCBA.
YES
YES
Laser
turns on when reading
disc?
LD_DVD or
LD_CD output
properly?
NO
Check the related circuit on
laser power transistor
Collector
voltage of power transistor
is OK?
Put disc in?
Disc ID is correct?
Does
spindle rotate?
Proper
SPINDLE_S signal on
ZR36888
SP+ & SP- output
properly?
Proper RF signal
on ZR36888?
C
D
TR
OUBLESHOO
TING