2-6
NO
Check connection lines
between FLASH & MT1389L
and the FLASH access time
whether is suitable or not.
NO
YES
YES
YES
YES
Check AV cable
connection to TV set.
YES
YES
YES
Flash
Memory operates
properly?
Check connection lines
between SDRAM(IC503) &
MT1389L and the SDRAM
is damaged.
NO
SDRAM
works properly?
Check the related circuit of
MT1389L IC501 Pins99, 102,
103, 104.
NO
MT1389L
VIDEO outputs
properly?
Show LOGO?
NO
Check the load OPEN &
CLOSE switch.
NO
Check AV cable connection
between main PCBA and
loader. (MECHA)
YES
YES
YES
Normal
OPEN_SW,
CLOSE_SW
signal?
Check the Tray control IO pins
on MT1389L.
NO
Normal
TROPEN & TRCLOSE
signal?
Check the Tray control MOTOR
& SERVO circuit IC400.
NO
Normal
LOAD+ & LOAD-
signal?
Does Tray
move inside when it
is not at closed
position?
Power On.
A
B
Содержание HT356SD
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