LG HT953TV Service Manual page 15

A
YES
Power On.
YES
Show LOGO?
YES
Does
Tray move inside when it
is not at closed
position?
YES
B
LGE Internal Use Only
Flash
NO
Memory operates
properly?
YES
SDRAM
works properly?
YES
ES8391
VIDEO outputs
properly?
YES
Check AV cable
connection to TV set.
Normal
NO
OPEN_SW,
CLOSE_SW
signal?
YES
Normal
TROPEN & TRCLOSE
signal?
YES
Normal
LOAD+ & LOAD-signal?
YES
Check AV cable connection
between main PCBA and
loader. (MECHA)
2-6
Check connection lines
NO
between FLASH &ES8391
and the FLASH access time
whether is suitable or not.
Check connection lines
NO
between SDRAM(IC502) &
ES8391 and the SDRAM is
damaged.
Check the related circuit of
NO
ES8391 IC501 Pins 99, 100,
103, 104, 105, 106.
NO
Check the load OPEN &
CLOSE switch.
NO
Check the Tray control IO pins
on ES8391.
NO
Check the Tray control MOTOR
& SERVO circuit IC401.
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Only for training and service purposes