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3-7
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
RESET or power on.
NO
NO
YES
Check connection lines
between FLASH & MT1389L
and the FLASH access time
whether is suitable or not.
NO
YES
Check connection lines
between SDRAM & MT1389L
and the SDRAM is damaged.
NO
YES
Check the related circuit of
MT1389L.
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 MT1389L & AM5890S.
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?
MT1389L
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
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