LG CED-8042B Manual page 59

LD CHECK (Not Recorded).
Refer to 'F. LD On' of 'How to use
Test Tool (Dragon)'
: 'VWDC-1 Loop'
Measure LD Power
YES
LD Power 6.0+/-2.0 mW?
NO
P/U Pin 32 (LDON)=H?
YES
P/U Pin 31 (W/XR)=H?
YES
IC601 Pin 5 (WREF)
: 0.6+/-0.2V?
YES
IC601 Pin 4(FPDO)
: 2.9+/-0.3V?
YES
P/U Pin 27 (VWDC1)
: 0.3+/-0.1V?
YES
Check the cold soldering for the P/U
connector and then replace P/U.
66
F
NO
NO
NO
NO
NO
YES
Check the cold soldering for the IC202.
Re-flash IC202 and then replace
IC202.
Check the cold soldering for the IC202.
Re-flash IC202 and then replace IC202.
Check the cold soldering for the R612,
IC209, IC401, IC407 and then replace
IC209, IC401, IC407.
Check the cold soldering for the
R545, R594, IC503 and then
replace IC503.
Check the cold soldering for the
R621, R622, R623, IC601
and then replace IC601.
Check the cold soldering for the
R621, R622, R623, IC601
and then replace IC601.
Refer to 'D. LD Inspection' of
'How to use Test Tool
(Dragon)'
VWDC1 NG?
NO
OK