3-5
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Only for training and service purposes
LGE Internal Use Only
RESET or power on.
NO
NO
YES
Check connection lines
between FLASH & MTK1389P
and the FLASH access time
whether is suitable or not.
NO
YES
Check connection lines
between SDRAM & MTK1389P
and the SDRAM is damaged.
NO
YES
Check the related
circuit of1389P.
NO
YES
Check the filtering and
amp circuit of TV signal.
Check AV cable
connection to TV set.
NO
NO
YES
Check the load
OPEN & CLOSE switch
NO
YES
Check the Tray control
IO pins on 1389P & AM5898N.
NO
YES
Check the Tray control
amplifying circuit on Motor driver.
Check the cable connection
between main PCBA and loader.
YES
YES
Show LOGO?
Flash
memory operates
properly?
138PDE/LP
VIDEO outputs
properly?
Normal
OPEN_SW & CLOSE_SW
signals?
Normal
OPEN & CLOSE
signal?
Normal
F & FAN_TRAY-
signal?
Does tray
move inside when
it is not at closed
position?
SDRAM
works properly?
Have TV
signal output?
A
B