4-2. How to Check Fault Symptom
Diagnostics
Power cord on.
Yes
Check ‘Stand-By A5.3V’
5.3V appear at BD210?
0V to A13V (CN202 #3)
No
Cause
: There did not supply the power
from SMPS.
Measure
: Change 10p power cable and
DC VSS-LED PD BD (
SMPS).
Yes
Set On.
Yes
Check ‘SW_POWER’ more than 3.3V
appear at CN202(#6)
0V to 3.3V↑ (CN202 #6)
No
Cause
: Main IC(NT14L) did not control
the SW_Power.
Measure
: Change the
ASSY PCB MAIN
.
Yes
Check ‘Power of main IC(B1.15V)’ appear
at BD917
Check ‘Power of DDR IC(B1.5V)’ appear
at BD911
No
Cause
: There is problem at
DCDC(IC201)/LDO(IC204).
Measure
: Change the
ASSY PCB MAIN
.
Yes
Check ‘Power of LVDS (13V)’
appear at TP-PANEL_VCC?
0V to 13V (TP-PANEL_VCC)
No
Cause
: There is proble at FET(Q202_
NFRC) or Main IC(NT14L) did
not control the SW_PVCC.
Measure
: Change the
ASSY PCB MAIN
.
Yes
Change the LVDS cable ?
No
Change the Panel.
4-3
4. Troubleshooting
