LG CED-8042B Manual page 64

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Refer to 'F. LD On' of 'How to use
Test Tool (Dragon)'
: 'CD-R Recording Mode'
Is the IC205 pin 19 (CDR/RW) 'L'?
YES
Is the IC404 pin 3 (CDR_WR) 'L'?
YES
Is the IC404 pin 8
(WREN) 'H'? & Is the IC404 pin 11
(RFGUP) 'L'?
YES
Is the IC209
pin 152 (EFM1), 153 (EFM2),
162 (RESAMP) 'Pulse'?
YES
Is the IC601
pin 39 (WFPDSH), 38 (RFPDSH),
37 (WBLSH), 36 (SPDSH), 35
(MPDSH) 'pulse'?
YES
Is the CN601 pin 30 (ODON), 31
(W/XR) 'pulse'?
YES
Dragon : Do LD 'Off'
OK
Go to <Picture 12>
Check the cold soldering for IC205 pin 19.
NO
Check communication line between IC205
and IC202 (MICOM).
NO Check the cold soldering for IC403,
IC404, IC406 and then replace IC403,
IC404, IC406.
Check the cold soldering for R416,
NO
IC404, IC405 and then replace IC404,
IC405.
NO Check the cold soldering for IC209
pin 152, 153, 162 and IC402, IC407.
Replace IC209, IC402, IC407.
Check the cold soldering for IC601 pin 39,
NO
38, 37, 36, 35 and R684, R651, R649,
R497, R496, IC403, IC401.
Replace IC601, IC403, IC401.
Check the cold soldering for R626,
NO
R612, R655, R657, C401, IC407 and
CN601 pin 30, 31.
Replace IC407.
Dragon : Do LD 'Off'
Go to <Picture 13>
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