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