4-1-4. SMPS Backlight
Backlight Test (CNM803 Removed)
CH1 192Vdc
P Item Volts P Item Volts
11 1F2 NC 12 1F1 NC
9 1- NC 10 2- NC
7 1- 96Vdc 8 2- 1Vdc
5 NC NC 6 NC NC
3 1+
192Vdc
4 2+ 190Vdc
1 1+ NC 2 2+ NC
<55" Panel Pin Map>
96Vdc
192Vdc
1Vdc
96Vdc
Backlight Test
Activate Backlight (Remove CN803).1.
Check 192Vdc Supply Voltage at Pin 3 and at CH1 on SMPS.2.
If Missing remove 3. CNL802 and test CH1 again. If still missing replace SMPS, If OK (high approx 280Vdc) replace
Panel.
Check pin map voltages. If 192Vdc is OK but other voltage(s) missing, replace 4. Panel.
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