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