4-2. How to Check Fault Symptom
Diagnostics
Power cord on.
Yes
Check ‘Stand-By A13V’
13V appear at
BD210
?
0V to A13V (CN202 #3)
No
Cause
: There did not supply the
power from SMPS.
Measure
: Change 10p power cable or
SMPS.
Yes
Set On.
Yes
Check ‘SW_POWER’
more than B3.3V appear at
CN202(#6)
0V to B3.3V↑ (CN202 #6)
No
Cause
: Main IC
(NT16L)
did not
control the SW_Power.
Measure
: Change the Main Assy.
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 Main Assy.
Yes
Check ‘Power of LVDS (13V)’
appear at
PANEL_VCC
?
0V to 13V (TP-PANEL_VCC)
No
Cause
: TThere is proble at
FET
(Q202_NFRC)
or d Main
IC(
NT16L
) did not control the
SW_PVCC.
Measure
: Change the Main Assy.
Yes
Change the LVDS cable.
No
Change the Panel.
4-2
4. Troubleshooting