LG MDT505 - Page 30

3-11
NO
Check connection lines between
FLASH & MT1389SE/GH and
the FLASH access time
whether is suitable or not.
YES
YES
YES
YES
YES
YES
YES
Check connection lines
between SDRAM(IC503) &
MT1389SE/GH and the
SDRAM is damaged.
NO
Flash
Memory operates
properly?
Check the related circuit of
MT1389SE/GH IC500 Pin139,
143, 145, 146.
NO
NO
Check the load OPEN &
CLOSE switch.
NO
YES
YES
YES
Check the Tray control IO Pin
on MT1389SE/GH and IC401.
NO
Normal
OPEN_SW,
CLOSE_SW
signal?
Check the Tray control MOTOR &
SERVO circuit IC400.
NO
B
A
Power On.
NO
Does Tray
move inside when it
is not at closed
position?
Show LOGO?
Check AV cable
connection to TV set.
SDRAM
works properly?
MT1389SE/GH
VIDEO outputs
properly?
Check FFC cable connection
between main PCBA and
loader. (MECHA)
Normal
TROPEN & TRCLOSE
signal?
Normal
LOAD+ & LOAD-
signal?