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2. TEST & DEBUG FLOW
POWER ON
YES
Show LOGO?
YES
Does tray
move inside when it is
closed position?
YES
A
NO
Flash memory
operates properly?
YES
SDRAM works
properly?
YES
ES8391 VIDEO
outputs properly?
YES
Check AV cable connection
to TV set
NO
OPEN_SW&CLOSE_
SW signals on P405
are ok?
YES
OPEN / CLOSE
signals on IC401 are
ok?
YES
Load+ & load- signals
on P401 are ok?
YES
Check the cable connection between
main pcb and MD (MECHA)
3-11
Check connection lines between
NO
FLASH & ES8391 or the FLASH
access time whether is suitable or not
Check connection lines
NO
between SDRAM (IC502) &
ES8391 or the SDRAM is
damaged
Check the related circuit of
NO
ES8391 (IC501)
pin163, 183, 145, 132, 120
NO
Check the MD mecha
Check the output signal of
NO
ES8391 to IC401 for control
OPEN/CLOSE
NO
Check the tray control
I/O pin on IC401
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