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•
75 inches
1
2+
2
7
1+
8
Backlight Test :
1.
Activate Backlights Test
Check TV Screen for active backlight LEDs.
9
2.
If No Backlights
Minus (Control) pins & Plus (Supply) pins voltages on the Panel Connector. (
9
connector only for
•
If
no pin voltages replace SMPS.
3.
If Backlights ON BUT PANEL SECTION(S) OFF
The Supply Drive (
9
•
If a Minus (-) pin measures low (near 0 volts), a string(s) of LEDs are likely open.
Replace
Panel.
9
•
If a
(+) pin measures low voltage.
Defective
9
BACKLIGHT DIMMING PROBLEMS :
•
Go to
Menu
Picture
£
•
If no backlight changes observed:
Panel Connector
9
backlight level.
•
If
minus (-) pin voltages don't change, and PWM_BLU changes, replace SMPS.
•
If
PWM_BLU doesn't change replace
Backlight Test :
In normal TV operating mode, use standard IR Remote or Factory Remote with commands.
Go to
MUTE
CNL801
LED Connector
2-
3
1-
9
: Disconnect Lead Cable from Main to Power Supply.
safety)
+) pins and (-) pins. All should measure same.
SMPS
Backlight
and vary level (0 – 50)
£
CNL801 minus (-) pin voltages and PWM_BLU control voltages CNM801
4
1
9
EXIT
£
£
£
£
CNL801 (LED Connector)
3+
4
5-
10
Main/T-Con
Board.
3-
5
6+
5+
11
4-
with fine test probe on left side of
4. Troubleshooting
6
6-
12
4+
while changing
4-13
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