Sharp LC-65XS1E (serv.man4) Service Manual ▷ View online
LC-52XS1E/RU/LC-65XS1E/RU
4 – 9
<At the time of AVC connection> No picture on the display (1)-2
No picture appears on LCD at the time of AVC connection.
Checklist:
1) Is “INPUT SOURCE” button
on the remote control set up correctly?
• • • Set it as the external input of the favorite with the INPUT
SOURCE button
of the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to “MIN”?
• • • Set it to an appropriate level.
3) Is the level of pin (12) (13) of IC6004 (TMDS-SW) at “H”?
• • • These are serial communications lines (I2C) for the control. If it is “L”, check
whether something pulls it to “L”.
4) IF-UNIT power supply input
• • • Check whether BU5V is inputted into PD (P5801) 6/7pin, and UR15V is inputted into PE (P5802) 1/2pin.
5) LCD-CTL-UNIT power supply input
• • • Check whether VCC (12V) is inputted into LC (P4802) 9/10pin.
(IF-UNIT)
YES
IF-UNIT output part: Is the LVDS_ [TA1:TD1]
± signal outputted
to the pin (40-28) of LW connector (SC7901)? and Is the
LVDS_[TA2:TD2]
LVDS_[TA2:TD2]
± signal outputted to the pin (26-14)?
(LCD-CTL-UNIT)
YES
At the FPC connector (SC7001) (39-79) pin of a LCD-CTL-UNIT
output part Is [P00:P61]
output part Is [P00:P61]
± signal outputted? Check whether
3.3V are supplied to 2/3 pin, VLS15.6V is supplied to 12/13 pin,
and -6V/35V are supplied to 34/35 pin.
and -6V/35V are supplied to 34/35 pin.
YES
Check the soldering of connector and driver IC of the LCD-
PANEL board. Or exchange LCD.
PANEL board. Or exchange LCD.
NO
At the pin (2-14) of LW connector (SC4801) of LCD-CTL-UNIT
input part, Is LVDS_[RA1:RE1]
input part, Is LVDS_[RA1:RE1]
± signal inputted?
Is LVDS_[RA2:RD2]
± signal inputted into the pin (26-14)?
Is VCC (12V) inputted into the pin (9/10) of LC connector
(P4802)?
(P4802)?
NO
Check the loose connection of LW harness, and disconnection.
or check soldering of SC4801.
or check soldering of SC4801.
YES
Replace LCD-CTL-UNIT.
LC-52XS1E/RU/LC-65XS1E/RU
4 – 10
[6] Abnormal screen display
Abnormal screen display
* Check the monitor separately. Feed the signal of 1080p 60Hz.
Do the backlights light?
NO
Go to the section "The backlights do not
light (Monitor and AVC)".
light (Monitor and AVC)".
YES
Does the monitor process
menu display appear?
menu display appear?
YES
When "LCD TEST PATTERN" on page 40/
46 of the monitor process menu is
switched except OFF, does the pattern dis-
play appear normally? (White pattern)
46 of the monitor process menu is
switched except OFF, does the pattern dis-
play appear normally? (White pattern)
NO
Check the peripheries of IC6152,
IC5403 (65" only), and IC5409. Check
the connection between LCD module
and FPC.
IC5403 (65" only), and IC5409. Check
the connection between LCD module
and FPC.
NO
YES
When "FRA TEST PATTERN" on page 40/
46 of the monitor process menu is
switched except OFF, does the pattern dis-
play appear normally? (Blue pattern)
46 of the monitor process menu is
switched except OFF, does the pattern dis-
play appear normally? (Blue pattern)
NO
Check the periphery of IC4901.
YES
When "FRA DDRA BIST" on page 4/46 of
the monitor process menu is executed,
does "OK/OK" appear?
the monitor process menu is executed,
does "OK/OK" appear?
NO
Check the peripheries of IC4901 and
IC590.
IC590.
YES
When "FRA DDRB BIST" on page 4/46 of
the monitor process menu is executed,
does "OK/OK" appear?
the monitor process menu is executed,
does "OK/OK" appear?
NO
Check the peripheries of IC4901 and
IC5902
IC5902
YES
Is the LVDS signal of SC4801 normal?
NO
Check the connection of SC4801 and
the thin coaxial.
the thin coaxial.
YES
When "PSF TEST PATTERN" on page 40/
46 of the monitor process menu is
switched except OFF, does the pattern dis-
play appear normally? (9 spot pattern)
46 of the monitor process menu is
switched except OFF, does the pattern dis-
play appear normally? (9 spot pattern)
NO
Check the peripheries of IC6203,
IC6204, IC6205, and X6201(33MHz).
IC6204, IC6205, and X6201(33MHz).
YES
Go to the section "No picture"
Is 12V applied to the pin 10 of
P4802 in the LCD_A3C con-
troller unit?
P4802 in the LCD_A3C con-
troller unit?
NO
Check the connection of P4802, the power
unit, and the IF PWB.
unit, and the IF PWB.
YES
Check the connection of
P7909 and the IF PWB.
P7909 and the IF PWB.
LC-52XS1E/RU/LC-65XS1E/RU
4 – 11
[7] Backlight Troubleshooting
Back light doesn't light.-1
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?
of SUB_POWER_UNIT1/2/3?
NO
Is the power supply input harness from AC-IN-UNIT correctly
connected? Check the loose connection etc.
connected? Check the loose connection etc.
YES
Is not F7601 4A disconnected?
YES
Are 27V and 20V outputted to LA1/2/3?
NO
Replace poor SUB-POWER-UNIT.
Back light doesn't light.-2
Does not back light in which portion of the LCD screen light up?
A part of back light doesn't light up.
One piece of a certain back light on a screen does not light up.
The back light of a certain one-row portion wide on a screen does
not light up.
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)
Seven line seven rows 52 types: Seven line seven rows)
NO
Does not back light of which line light up? (65 types: 7 rows and
52 types: Six rows)
52 types: Six rows)
Find a poor row and column number, and replace the LED board
unit.
unit.
POWER-DISTRIBUTION-
UNIT
UNIT
NO
Is RGB power supply 20V/27V supplied to the CN** connector of
the poor row number?
((1)pin=20V, (5)/(6)pin=27V)
the poor row number?
((1)pin=20V, (5)/(6)pin=27V)
YES
There is possibility of disconnection between the LED board
units of a poor row number. Check internal wire connection.
units of a poor row number. Check internal wire connection.
NO
Check the loose connection of the CN** connector of the poor
row number of DISTRIBUTION-UNIT etc.
row number of DISTRIBUTION-UNIT etc.
65 Inch LED board connection diagram (Front view)
1st row
2nd row 3rd row
4th row
5th row
6th row
7th row
1st line
SUB-POWER3
2nd line
3rd line
SUB--POWER1
4th line
5th line
6th line
SUB-POWER2
7th line
52 Inch LED board connection diagram (Front view)
1st row
2nd row 3rd row
4th row
5th row
6th row
1st line
2nd line
SUB-POWER1
3rd line
4th line
5th line
SUB-POWER2
6th line
LC-52XS1E/RU/LC-65XS1E/RU
4 – 12
The color of back light is abnormal.-1
The whole back light is reddish.
LED 27V has not gone out, and it checks it sequentially.
Check whether there is any abnormal or connection error of a
LED-PANEL array.
LED-PANEL array.
YES
Are 27V input to LA1/2/3 pin(1) (2) (3) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
YES
Have 27V come out in output connector (CN5-8) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
NO
NO
Are 27V output to (1) (2) pin of the LA1 connector of
SUB1_POWER-UNIT?
SUB1_POWER-UNIT?
Check whether there is any part which 27V line opens within
POWER-DISTRIBUTION-UNIT
POWER-DISTRIBUTION-UNIT
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
NO
If 27V of SUB1_POWER-UNIT does not come out, 20V stops
coming out.
Check the IC5101A feedback circuit and the peripheral circuit.
coming out.
Check the IC5101A feedback circuit and the peripheral circuit.
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
The color of back light is abnormal.-2
The whole back light is bluish.
LED 20V has not gone out, and it checks it sequentially.
Check whether there is any abnormal or connection error of a
LED-PANEL array.
LED-PANEL array.
YES
Are 20V input to LA1/2/3 pin (5) (6) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
YES
Have 20V come out in output connector (CN5-8) of POWER-
DISTRIBUTION2-UNIT?
DISTRIBUTION2-UNIT?
NO
NO
Are 20V output to (5) (6) pin of the LA1 connector of
SUB1_POWER-UNIT?
SUB1_POWER-UNIT?
Check whether there is any part which 27V line opens within
POWER-DISTRIBUTION-UNIT
POWER-DISTRIBUTION-UNIT
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
NO
Check 20V generation circuit of SUB1_POWER-UNIT.
(IC5003,Q5007,IC5101B)
(IC5003,Q5007,IC5101B)
NO
Check about SUB2_POWER-UNIT/SUB3_POWER-UNIT simi-
larly.
larly.
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