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[7] Backlight Troubleshooting
Does not back light in which portion of the LCD screen light up?
The whole back light does not light up.
Is alternating voltage AC220V input to AC input (AC1/AC2/AC3)
of SUB_POWER_UNIT1/2/3?
Is not F7601 4A disconnected?
Are 27V and 20V outputted to LA1/2/3?
Replace poor SUB-POWER-UNIT.
Does not back light in which portion of the LCD screen light up?
A part of back light doesn't light up.
The back light of a certain one-row portion wide on a screen does
not light up.
Does not back light of which line light up? (65 types: 7 rows and
52 types: Six rows)
POWER-DISTRIBUTION-
UNIT
Is RGB power supply 20V/27V supplied to the CN** connector of
the poor row number?
((1)pin=20V, (5)/(6)pin=27V)
Check the loose connection of the CN** connector of the poor
row number of DISTRIBUTION-UNIT etc.
52 Inch LED board connection diagram (Front view)
1st row
2nd row 3rd row
4th row
Back light doesn't light.-1
YES
YES
NO
Back light doesn't light.-2
NO
NO
NO
5th row
6th row
1st line
2nd line
SUB-POWER1
3rd line
4th line
5th line
SUB-POWER2
6th line
NO
Is the power supply input harness from AC-IN-UNIT correctly
connected? Check the loose connection etc.
One piece of a certain back light on a screen does not light up.
Does not back light which row of which line light up? (65 types:
Seven line seven rows 52 types: Seven line seven rows)
Find a poor row and column number, and replace the LED board
unit.
YES
There is possibility of disconnection between the LED board
units of a poor row number. Check internal wire connection.
65 Inch LED board connection diagram (Front view)
1st row
2nd row 3rd row
4th row
4 – 11
LC-52XS1E/RU/LC-65XS1E/RU
5th row
6th row
7th row
1st line
2nd line
3rd line
4th line
5th line
6th line
7th line
SUB-POWER3
SUB--POWER1
SUB-POWER2
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Table of Contents
Troubleshooting
