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