LG MICRO Hi-Fi SYSTEM Service Manual page 25

A
YES
Does the
SLED move to inner side
when it is at outer
position?
YES
Do not put in disc
and tray close
YES
Optical
lens is moving
for searching focus?
YES
B
NO Motor driver
DRV_MMUTE pin
high 3
YES
SLED signal is ok?
YES
Check the cable connection
with MECHA
Proper
NO
Focus outputs
to motor driver?
YES
Proper F+ & F- outputs?
YES
Check cable connection
with pick-up head
3-12
NO
Check the MD
NO
Check the related circuit of SLED
and Motor driver IC (IC401)
NO
Check Focus connection on
ES8391 and motor driver IC
NO
Check the motor driver (IC401)