LG GCE-8240B Service Manual page 59

LD CHECK (Not Read)
E
Execute 'E. ALPC Test for AS' of
'How to use Test Tool(Dragon) :
'VRDC Loop [Read Mode]'
PN401 Pin 33(ENBL)=H?
YES
IC401 Pin 96(RREF):
0.9+/-0.5V?
YES
IC401 pin 100(FPDO):
2.9+/-0.3V?
YES
PN401 Pin 25(VRDC):
1.0+/-0.3V?
YES
Check the P/U connector and then
replace the P/U.
NO
•
Check the connection of IC301 pin 12.
•
Check and replace the IC301(MB90F482).
•
Check the connection of IC402 Pin 18
•
Check and replace the IC402(DAC).
NO
•
Check the communication line between
IC301 pin 60 and IC402 pin 15.
•
Check and replace the IC301(Micom)
NO
•
Check the connection of PN401 pin 19
(FPDO)
•
Check and replace the PN401, PICK UP.
NO
•
Check the connection of IC401 pin 97.
•
Check and replace the IC401.
Execute 'D. Laser Inspection' of 'How to
use Test Tool(Dragon)'
YES
VRDC NG?
NO
Normal
65