4-2. How to Check Fault Symptom
NO Power and No Video
Power cord on.
Yes
Check ‘Stand-By A19V_PW’ 19V appear
at BD213 or BD210 or BD212?
No
Cause
: There did not supply the power from SMPS.
Measure
: Change 10P power cable and SMPS.
Yes
Check Function board LED light ?
Standby mode : ON
No
Cause
: Sub micom IC did not control the Function.
Measure
: Change the Main Assy or change Function.
Yes
Set On.
Yes
The Remote control act ?
No
Cause
: Remote control has no battery.
Measure
: Change the battery.
Yes
Check ‘TP_SW_POWER’?
3.3V : Standby 0V : B Power on
No
Cause
: Sub micom IC did not control the SW_Power.
Measure
: Change the Main Assy.
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 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
Change the LVDS cable ?
No
Change the Panel.
Yes
Change the LVDS cable ?
4-2
4. Troubleshooting