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LC-46XL1E/RU, LC-52XL1E/RU

4 – 17

                                             
No EXT6 (HDMI) output of the external input system.

                                             
Checklist:

1) Is “INPUT SOURCE” button

on the remote control set up correctly? ... See the operation manual and set “INPUT SOURCE” to “EXT6”.

2) Have you checked the type video signal sent from HDMI-connected external device? ... Confirm the type (it should “RGB”, “YCbCr 4:4:4” or 

“YCbCr 4:2:2”).

3) Have you checked the type of Color matrix sent from HDMI-connected external device? ... Confirm the type (it should be “ITU601” or “ITU709”.)
4) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.

                                             

Is “EXT6” selected with

button on the remote control?

NO

Select “EXT6” with   

button on the remote control.

YES

Is the type of video signal (Signal Type) from HDMI- connected 
external device set?

NO

From MENU-Connections-HDMI setup-EXT6-Signal type, select 
a signal type (“RGB”, “YCbCr 4:4:4” or “YCbCr 4:2:2”).

YES

Is the type of color signal (Color Matrix) from HDMl-connected 
external device set?

NO

From Connections-HDMI setup-EXT6-Color Matrix, select a 
color signal type (“ITU601” or “ITU709”).

YES

Is TMDS signal (RX*

±signal) sent to pins (1) - (12) of EXT6 

(HDMI) terminal (SC1902)?

NO

Is I2C signal (SDA/SCL signal) sent to pins (16) and (15) of 
EXT6 (HDMI) terminal? Check external connection and periph-
eral circuits.

YES

Is 8bit-DIGITAL signal (HDMI- R/G/B) sent from pins (110) - (144) 
of IC1905 (HDMI-RECEIVER)?

NO

Check power supply (3.3/1.8V) pins (99) and (74) of IC1905, 
SDA/SCL signal pins (29) and (30), and peripheral circuits.

YES

Is 8bit-DIGITAL signal (HDMI- R/G/B) sent to pins (B10) - (D15) of 
IC3002 (V-PRO.)?

NO

Check SDA3/SCL3 signal pins (27) and (28), interface between 
IC1905 and lC3002, and peripheral circuits.

YES

Is LVDS video signal (TA1

±~TE1±) sent to pins (AB8)/(AC8) - 

(AB3)/(AC3) of IC3002 (V-PRO.), and is CLK signal (CK1

±) sent 

to pins (AB5)/(AC5)?
Is LVDS video signal (TA2

±~TE2±) sent to pins (AC2)/(AC1) - 

(V2)/(V1) of IC3002 (V-PRO.), and is CLK signal (CK2

±) sent to 

pins (Y2)/(Y1)?

NO

Check pins (G14)/(U10) of BU3.3V line of IC3002 (V-PRO.), 
pins (G10)/(N17) of BU2.5V line, pins (U16)/(G12) of BU1.8V 
line and peripheral circuits.

YES

Check the FRC- circuit.
Refer to sheet of FRC (100Hz). (P4-20)

YES

Is LVDS video signal (TA1

±~TE1±) sent to pins (3)/(2) - (18)/(17) 

of CONNECTOR CN1 of LCD-CONT-UNIT, and is CLK signal 
(CK1

±) sent to pins (12)/(11)?

Is LVDS video signal (TA2

±~TE2±) sent to pins (21)/(20) - (36)/

(35) of CONNECTOR CN1 of LCD-CONT-UNIT, and is CLK sig-
nal (CK2

±) sent to pins (30)/(29)?

NO

Check CONNECTOR (SC6211, CN1) and HARNESS WIRE.

YES

Is power (+12V) supplied to pins (1) - (5) of CONNECTOR CN3 in 
LCD-CONT-UNIT?

NO

Check CONNECTOR (CN3, PL) and HARNESS WIRE (PL).

YES

Replace LCD-CONT-UNIT.

LC-46XL1E/RU, LC-52XL1E/RU

4 – 18

                         
NOTE: The SD signal (576i 480i) alone passes through the FRC circuit. (The HD signal does not go through.)

                         

                        

                       

Does the image appear with the HD sig-
nal, but not with the SD signal?

Does anything unusual (which or black-
ish screen, block noise, for example) 
appear on the screen?

Does the image look unusual with the 
power switch turned on?

YES

YES

YES

Is the power supplied to IC3301 (FRC)?
Is there the FRC-IN signal input at pins 
(142) and (13) of IC3301?
Check the soldering condition.

Is there the specified RESET-A signal 
input at pin (39) of IC3301(FRC)?
(60 ms delay design)

Check the connection between pin 
(R22) of IC3002 (V-PRO.) and pin 
(142) of IC3301 (FRC) as well as that 
between pin (N20) of IC3302 and pin 
(13) of IC3301.

YES

NO

Replace IC3301(FRC).

Check “RESET-A” signal pin (34) of 
IC1710 (CPLD).

                      
Do all the fluorescent tubes light up?

NO

Check the individual fluorescent 
tubes for light-up failure.

YES

Replace any defective fluorescent 
tubes with new ones.

YES

Is the power supplied to CN7401 and 
CN7601 on the inverter unit? (LA)

NO

Check the connection between power 
unit and inverter unit.

YES

Is the fuse (F7401 or F7601) in the 
inverter unit circuit functioning?

NO

Replace the blown-out fuse (F7401 or 
F7601) on the inverter unit. Turn on 
the power again.
If the fuse gets blown out again, 
check the short-circuited spot.

YES

Check T7401 and T7601 and their 
peripheral circuits as well as IC7401 
and their peripheral circuits.

YES

Is the VCC power supplied to the 
control IC (IC7401) on the inverter 
unit?

NO

Check the circuit connected with the 
VCC terminal on the inverter control 
IC (IC7401).

YES

Has each control signal come to 
CN7402? (INV-OFL, INV-OSC, INV-
STB, INV-BRT)

NO

Have INV-OFL/OSC and the INV-STB 
signal come to P1701 (LB) in the 
MAIN substrate?

NO

Check pins (19), (17) and (89) of 
IC1710 (main PWB).

YES

Is the specified control signal input-
ted at IC7401 (INV-CTL) on the 
inverter unit.

NO

Check the line between CN7402 and 
IC7401.

YES

Are the Q7405 and Q7406 transis-
tors at the primary side of T7401 
functioning?

NO

Check the power line of IC7401, Its 
peripheral circuits or replace IC7401. 

YES

Is the secondary circuit of T7401 
functioning.

NO

Replace T7401 or the T74** trans-
former for the fluorescent tubes, or 
check their peripheral circuits.

LC-46XL1E/RU, LC-52XL1E/RU

4 – 19

                      
Do all the fluorescent tubes light up?

NO

Check the individual fluorescent 
tubes for light-up failure.

YES

Replace any defective fluorescent 
tubes with new ones.

YES

Is the power supplied to CN7507B 
and CN7507D on the inverter unit?

NO

Check the connection between power 
unit and inverter unit.

YES

Is the fuse (F7501A/B/C/D) in the 
inverter unit circuit functioning?

NO

Replace the blown-out fuse (F7501A/
B/C/D) on the inverter unit. Turn on 
the power again.
If the fuse gets blown out again, 
check the short-circuited spot.

YES

Check T7501A, T7501B, T7501C and 
T7501D and their peripheral circuits 
as well as IC7502B and their periph-
eral circuits.

YES

Is the VCC power supplied to the 
control IC (IC7502B) on the inverter 
unit?

NO

Check the circuit connected with the 
VCC terminal on the inverter control 
IC (IC7502B).

YES

Has each control signal come to 
CN7508B? (INV-OFL, INV-OSC, 
INV-STB, INV-BRT)

NO

Have INV-OFL/OSC and the INV-STB 
signal come to P1701 (LB) in the 
MAIN substrate?

NO

Check pins (19), (17) and (89) of 
IC1710 (main PWB).

YES

Is the specified control signal input-
ted at IC7502B (INV-CTL) on the 
inverter unit.

NO

Check the line between CN7508B 
and IC7502B.

YES

Are the Q7501B, Q7502B, Q7503B 
and Q7504B transistors at the pri-
mary side of T7501B functioning?

NO

Check the power line of IC7502B, its 
peripheral circuits or replace 
IC7502B.

YES

Is the secondary circuit of T7501B 
functioning.

NO

Replace T7501B or the T75*** trans-
former for the fluorescent tubes, or 
check their peripheral circuits.

Does a single or several verti-
cal stripes appear on the LCD 
screen? 

Does a single or several hori-
zontal stripes appear on the 
LCD screen?

Do luminescent or black dots 
appear on the screen?

 Is the on-screen image rip-
pling or distorted?

Replace the LCD panel.

The backlight func-
tions. Does not the 
image come out in the 
LCD screen (screen 
black)? 

Does the entire LCD 
screen look whitish all 
over?

Does the QS drive func-
tion?

 Are the data bit drop-
out?
(No solution even when 
turning on and off the QS 
drive)

Is the gamma correc-
tion as specified?

Replace the LCD control unit.

LC-46XL1E/RU, LC-52XL1E/RU

4 – 20

                                    
No sound or picture come out.
The screen is overall abnormal.

                                    
Confirm whether the power supply is defective.

Are 12V input to P4802?
Confirm whether 12V is output from CN8 (FL).

YES

                                 YES

Are 3.3V output from pin2 of IC4803?
Are 2.5V output from pin2 of IC4802?
Are 1.2V output from pin2 of IC4801?
Are 1.25V output from pin8 of IC6004?

Confirm the IC6341 (FPGA) circuit.

Is the clock output from X6341 at 33MHz cycle?
Confirm the surrounding of IC6342 (PROM).
Confirm the surrounding of IC6341 (FPGA).

YES

YES

Confirm the IC5801 (FRC) circuit.

Is the clock output from X5801 at 27MHz cycle?
Confirm the surrounding the IC5801 (FRC).

The screen is horizontally displayed only at intervals of one.
The display of putting of one is abnormal.

A horizontal even number line is abnormal ..not going out...

A horizontal odd number line is abnormal ..not going out...

Check the surrounding of IC6281(LVDS_RX_even).

Check the surrounding of IC6282(LVDS_RX_odd).

The screen upper half is abnormal ..not going out...

The screen lower half is abnormal ..not going out...

Check the connection of SC6211.

Check the connection of SC6212.

Check the surrounding of IC6212(LVDS_TX_upper).

Check the surrounding of IC6211(LVDS_TX_lower).

250ms

1sec

Type of error

Kind of LED

Power LED operation (1 cycle)

Remarks

H:OFF

Lamp error

STANDBY LED

Blinking once

L:ON
H:OFF

Lamp error

STANDBY LED

Blinking once

At five time accumulation

L:ON
H:OFF

The lamp is turned off

SLEEP TIMER LED

Blinking once

when it is abnormal usually.

L:ON
H:OFF

Power error

STANDBY LED

Blinking twice

L:ON
H:OFF

Temperature error

STANDBY LED

Five time blinking

L:ON
H:OFF

FAN error

STANDBY LED

Seven time blinking

L:ON