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2. TEST & DEBUG FLOW
POWER ON
YES
Show LOGO?
YES
Does DISC was
inserted inside when
you push Disc1~5
button?
YES
A
LGE Internal Use Only
NO
Flash Memory
operates properly?
YES
SDRAM works
properly?
YES
ES8390 VIDEO
outputs properly?
YES
Check AV cable connection
to TV set.
NO
SW5 & SW7 signals
on PN4402 are OK?
YES
OPEN / CLOSE
signals on IC401 are
OK?
YES
Load+ & load- signals
on PN4402 are OK?
YES
Check the cable connection between
DVD PCB and MD (MECHA).
3-32
Check connection lines between
NO
FLASH & ES8390 or the FLASH
access time whether is suitable or not.
Check connection lines between
NO
SDRAM.
(IC502) & ES8390 or the SDRAM is
damaged.
Check the related circuit of
NO
ES8390 (IC501)
PIN80,83,84,85
NO
Check the MD mecha
Check the output signal of
NO
ES8390 to IC401 for control
OPEN/CLOSE.
NO
Check the Tray control I/O
Pin on IC401.
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Only for training and service purposes
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Table of Contents
Troubleshooting
