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Is "EXT4" selected with
button on the remote control?

Select "EXT4" with        button 
on the remote control.

Is D-SUB-COMPONENT signal 
(PCV_R/G/B) sent to pins (1), 
(2) and (3) of EXT4-TERMINAL 
(SC2303)?

Check D-SUB-adaptor and 
external connection.

Is D-SUB-COMPONENT signal 
(PCV_R/G/B=VIN19/20/21))
sent to pins (174), (173) and 
(172) of IC3002 (VCT)?

Check EXT4-TERMINAL and 
peripheral circuits.

Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and (140) - (129) and (128) of IC3002 (VCTP), and is 
CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?

Check pins (192), (170) and 
(133) of BU3.3V power line and 
pins (185), (169) and (142) of 
BU1.8V power line of IC3002 
(VCTP), and peripheral circuits.

Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - (24) and (25) of CONNECTOR CN1 in LCD-
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?

Check CONNECTOR (P2305, 
CN1) and Hareness Wire (LV).

Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?

                                                                      Replace LCD-CONT-UNIT.

No EXT4 (15pin-D-SUB-terminal) 
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 "EXT4".
2) Connect the included D-SUB-Adapter-Cable to the COMPONENT terminal of an external device.  ··· See the operation manual (use a commercially 
    available Component-Cable to connect to the external device).
3) Is ANT-CABLE disconnected or connected improperly? ··· Connect it correctly as per the operation manual.

 Check HARNESSWIRE (LV).

 Is IC 1705 supplying LCD 5V?

 Check IC1705 and peripheral parts.

 Change IC1705.

 Is LCD5V supplied to pins (31)  -   

 (28) of  CONNECTOR (P2305)?

Is "EXT5" selected with
button on the remote control?

Select "EXT5" with        button 
on the remote control.

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

From MENU-Option-HDMI 
Setup-Signal Type, select a 
signal type ("RGB", "YCbCr 
4:4:4" or "YCbCr 4:2:2").

Is the type of colour signal 
(Colour Matrix) from HDMI-
connected external device set?

From Option-HDMI Setup-
Colour Matrix, select a color 
signal type ("AUTO", "ITU601" 
or "ITU709").

Is TMDS data (RX`

± signal) 

sent to pins (1) – (12) of EXT5 
(HDMI) terminal (SC1901)?

Is I2C signal (SDA/SCL signal) 
sent to pins (16) and (15) of 
EXT5 (HDMI) terminal? Check 
external connection and 
peripheral circuits.

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

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

Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (73) – (50) of 
IC3002 (VCT)?

Check SDA3/SCL3 signal pins 
(27) and (28), interface between 
IC1905 and IC3002, and 
peripheral circuits.

Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and (140) - (129) and (128) of IC3002 (VCTP), and is 
CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?

Check pins (192), (170) and 
(133) of BU3.3V power line and 
pins (185), (169) and (142) of 
BU1.8V power line of IC3002 
(VCTP), and peripheral circuits.

Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - (24) and (25) of CONNECTOR CN1 in LCD-
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?

Check CONNECTOR (P2305, 
CN1) and Hareness Wire (LV).

Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?

                                                                    Replace LCD-CONT-UNIT.

No EXT5 (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 "EXT5".
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or 
    "YCbCr 4:2:2").
3) Have you checked the type of Colour 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.

 Check HARNESSWIRE (LV).

 Is IC 1705 supplying LCD 5V?

 Check IC1705 and peripheral parts.

 Change IC1705.

 Is LCD5V supplied to pins (31)  -   

 (28) of  CONNECTOR (P2305)?

Do all the fluorescent tubes light up?

Check the individual fluorescent 
tubes for light-up failure.

Is the specified control signal 
inputted at IC1 (INV-CTL) on the 
inverter unit?

Check the line between CN3 and 
IC1.

Are the Q16-Q19 transistors at the 
primary side of T1 functioning?

Replace IC1 (INV-CTL) or check its 
peripheral circuits.

Is the secondary circuit of T1-T8 
functioning?

Replace the T1-T8 transformer for 
the fluorescent tubes, or check their 
peripheral circuits.

Replace any defective fluorescent 
tube (s) with new one (s).

Replace the blown-out CP4/CP3/CP1 
fuse on the inverter unit. Turn on the 
power again. If the fuse gets blown out 
again, check the short-circuited spot.

Check T1-T8 and their peripheral 
circuits as well as Q16-Q19 and their 
peripheral circuits.

Is the power supplied to CP3 on the 
inverter unit?

Is the CP4/CP3/CP1 fuse in the 
inverter unit circuit functioning?

Check the connection between 
power unit and inverter unit.

Are there the INV-ON and INV-BRT 
signals at P704 on the power unit, 
and the (INV-ON and INV-BRT) 
signals at SC1702 on the main PWB?

Check pins (5) and (7) of IC1710 
(main PWB).

Are there control signals (INV-ON, 
INV-BRT, PWM-SEL) at CN3 on the 
inverter unit?

Check the circuit connected with the 
VCC terminal on the inverter control 
IC (IC1).

Is the VCC power supplied to the 
inverter control IC (IC1) on the 
inverter unit?

Do all the fluorescent tubes light up?

Check the individual fluorescent 
tubes for light-up failure.

Is the specified control signal 
inputted at IC7501 (INV-CTL) on the 
inverter unit?

Check the line between CN7502 and 
IC7501.

Are the Q7528 and Q7525 
transistors at the primary side of 
T7501 functioning?

Replace IC7501 (INV-CTL) or check 
its peripheral circuits.

Is the secondary circuit of T7501 
functioning?

Replace T7501 or the T75** 
transformer for the fluorescent tubes, 
or check their peripheral circuits.

Replace any defective fluorescent 
tube (s) with new one (s).

Replace the blown-out F7501 fuse on 
the inverter unit. Turn on the power 
again. If the fuse gets blown out 
again, check the short-circuited spot.

Check T7501 and T7502 and their 
peripheral circuits as well as IC7501 
and their peripheral circuits.

Is the power supplied to CN7501 on 
the inverter unit?

Is the F7501 fuse in the inverter unit 
circuit functioning?

Check the connection between 
power unit and inverter unit.

Are there the INV-OFL, INV-OSC, 
INV-STB (ON/OFF) signals at P1701 
on the main PWB?

Check pins (5), (7) and (8) of IC1710 
(main PWB).

Are there control signals (INV-OFL,  
INV-BRT, INV-OSC, INV-STB (ON)) 
at CN7502 on the inverter unit?

Check the circuit connected with the 
VCC terminal on the inverter control 
IC (IC7501).

Is the VCC power supplied to the 
inverter control IC (IC7501) on the 
inverter unit?