LG HT953TV Service Manual page 17

C
YES
Laser turns on when
reading disc?
YES
Put disc in?
YES
Disc ID is correct?
YES
Does spindle rotate?
YES
D
LGE Internal Use Only
DVDLD or
NO
CDLD output
property?
YES
Collector
voltage of power transistor
is OK?(Q401, Q403).
YES
Check cable connection
between transistor output and
pick-up head.
NO
Laser off.
NO Proper
RF signal on ES8391.
YES
Check the RF connection
between IP9010 and ES8391.
Proper
NO
SPINDLE signal on
ES8391.
YES
SPNP
SPNN output
properly?
YES
Check the cable connection
between spindle and main
PCB.
2-8
Check the laser power circuit
NO
on ES8391 and connecting to
power transistor.
(Q401, Q403).
NO
Check the related circuit on
laser power transistor.
NO
Check the related circuit on
ES8391 RF signal.
NO
Check the SPINDLE related
circuit on ES8391.
NO
Check the spindle control amp
circuit of motor driver.
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