LD Board Troubleshooting
Force on the backlights.1.
Check the fuses (F3001, F5001, F5101, F5201, F5301, F5401, F5501, F5601) on either side for approximately 30 Vdc; 2.
if abnormal, suspect a defective panel, SMPS or LD.
Check the negative pins on CN9005 ~ CN9014 for approximately 1Vdc (due to forced operation).3.
LD Board/Panel Troubleshooting
Verify SMPS Vdrv 30 Vdc to LD Board (CN9001).1.
Unload the LD Board by removing the cables connected to CN9005 ~ CN9014.2.
Check the 3. fuses on either side for approximately 30 Vdc (only when LD Board is UNLOADED).
If voltage is 30 Vdc on all 5 fuses, panel is likely defective.4.
If voltage is low on any fuse, LD Board is likely defective.5.
To Next Page
Loading...
