LG MDS64V, Service Manual

Page: 26 / 59

3-11
2. TEST & DEBUG FLOW
NO
Check connection lines
between FLASH & ES8390 or
the FLASH access time
whether is suitable or not
NO
YES
Check AV cable connection
to TV set
Show LOGO?
YES YES
Flash memory
operates properly?
Check connection lines
between SDRAM (IC502) &
ES8390 or the SDRAM is
damaged
NO
YES
SDRAM works
properly?
Check the related circuit of
ES8390 (IC501)
pin133,134,137,138,139,140
NO
YES
ES8390 VIDEO
outputs properly?
NO
Check the MD mecha
NO
Check the cable connection
between DVD PCB and MD
(MECHA)
Does tray
move inside when it is
closed position?
YES YES
OPEN_SW&CLOSE_
SW Signals on P406
are ok?
Check the output signal of
ES8390 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 P406 are ok?
A
POWER ON