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     LC-42SD1E/RU

4 – 9

D-TUNER UNIT:
Is data FED[0:7] sent from pins (3),(4),(5),(6),(8),(9),(10) and (11) 
of P202?

NO

Check R272 and R273.

YES

DIGITAL UNIT:
Are video signals (R/G/B,CVBS) sent from C4639/C4640/C4641/
C4625?

NO

Check R4011(AC8pin),R4013(AC9pin) and IC4001(D-Proces-
sor).

YES

Are video signals (R/G/B,CVBS) send from the C4636/C4637/
C4638 and emitters of Q4607?

NO

Check Q4601-Q4605,Q4607 and their peripheral circuits.

YES

MAIN UNIT:
Is video signal (CVBS) sent from pin (2) of IC2705(SW).

NO

Check power supply and pin (1) of IC2705(SW).

YES

Are video signals (R/G/B,CVBS) fed from pins (179),(180),(181) 
and (184) of IC3002?

YES

Are scrambled images not displayed?

YES

DIGITAL UNIT:
Check 5V output of pin (1) of IC4702.
Check 5V of pin (6) of Q4401.

NO

Perform the same check as the model P70E or GD8E.

No audio output during DTV reception. Sound is low.

DIGITAL UNIT:
Is audio signal fed to pins (5) and (10) of IC4604 (OP-AMP)?

NO

Check R4002(AD2pin) and IC4001(D-Processor).

YES

Is audio signal sent from pins (7) and (8) of IC4604 (OP-AMP)?

NO

Check power supply of IC4604(OP-AMP) and its peripheral cir-
cuits.

YES

MAIN UNIT:
Is audio signal sent to pin (3) and (13) of IC2704 (SW)?

NO

heck power supply and pins (9) and (10)of IC2704(SW) and 
audio signal input of pins (4) and (11) of IC2704.

YES

Perform the same check as the model P70E or GD8E.

LC-42SD1E/RU

4 – 10

                                            
No picture appears on LCD during the tuner (U/V) reception.

                                            

 

Checklist: 
1) Is “INPUT SOURCE” button 

on the remote control set up correctly? 

••• See the operation manual and set “INPUT SOURCE” to “TV”.

2) Is MENU-PICTURE-Contrast/Brightness set to “MIN”? 

••• Set it to an appropriate level.

3) Is ANT-CABLE disconnected or connected improperly? 

••• Connect it correctly as per the operation manual.

YES

Is level of pins (5) and (4) of tuner (TU201) and pins (10) and (11) 
of IC201 (IF-DEMOD) at H?

NO

These are communications lines for control (I2C). Follow the 
path and check whether they are forced to L (PULL_DOWN). 

YES

Is the video signal (IF) sent from pin (8) of tuner (TU201)?

NO

Check the tuner (TU201) and peripheral circuits.

YES

Is video signal sent from pin (17) of IC201 (IF-DEMOD)? 

NO

Check FL201 (SAW-FIL), IC201 and peripheral circuits.

YES

Is the video signal VIN1 (ATUNER-CVBS) sent to pin (191) of 
lC3002 (VCT)? 

NO

Check IC201 (IF-DEMOD), CONNECTOR (P201 /SC2705) and 
peripheral circuits.

YES

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

NO

Check pins (192)/(170)/(133) of BU3.3V line of IC3002 (VCT), 
pins (185)/(169)/(142) of 1.8V line and peripheral circuits.

YES

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

NO

Check CONNECTOR (P2305, CN1) and HARNESS WIRE (LV).

YES

Is power (LCD5V) supplied to pins (1) - (4) of CONNECTOR CN1 
in LCD-CONT-UNIT? 

NO

Is LCD5V supplied to pins (31) - (28) of CONNECTOR (P2305)?
Check HARNESS WIRE (LV).

YES

Replace LCD-CONT-UNIT.

     LC-42SD1E/RU

4 – 11

                                            
SCART1:
No picture appears on EXT1 - connected monitor during the tuner 
(U/V) reception. 

                                            
Checklist: 
1) Are input terminal on back of TV and “INPUT SOURCE” button 

on the remote control set up correctly? 

••• See the operation manual and 

set “INPUT SOURCE” appropriately.

2) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? 

••• Set it to “CVBS”, “Y/C” or “RGB”.

3) Is ANT-CABLE disconnected or connected improperly? 

••• Connect it correctly as per the operation manual.

4) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.

When sent by component, etc., that signal is not sent to the monitor.

5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching).

The picture of the last selected TV channel is always sent to EXT1. (Specification)

                                             
Is video signal sent to pin (19) of SCART1 (J1101)?

YES

Check SCART1, external connection or input setting. 

NO

Is video signal (V-OUT1) sent from pin (2) of IC1102 (SW)?

YES

Check SCART1 (J1101) and peripheral circuits.

NO

Is video signal (V-OUT1) sent from pin (195) of IC3002 (VCT)? 

YES

Check IC1102 (SW), Connector (P1101, SC2702) and peripheral 
circuits.

NO

Is video signal (CVBS) sent to pin (191) of lC3002 (VCT)? 

YES

Check power supply of IC3002 (VCT) and peripheral circuits.

NO

Is video signal (CVBS) sent from pin (17) of IC201 (IF-DEMOD)? 

YES

Check CONNECTOR (P201, SC2705) and peripheral circuits.

NO

Is video signal (IF) sent from pin (8) of tuner (TU201)? 

YES

Check IC201, FL201 (SAW-FIL), Q202 and peripheral circuits.

NO

Check 5/5 (CONT) V power supply pins (7) and (1), I2C line pins 
(5) and (4) of tuner (TU201) and peripheral circuits.

LC-42SD1E/RU

4 – 12

                                            
SCART2:
No picture from EXT1 appears on EXT2-connected monitor.

NOTE: Normally, if the screen during display is sent to EXT2, no 

picture is sent to EXT2.

                                            
Checklist: 
1) Are input terminal on back of TV and “INPUT SOURCE” button 

on the remote control set up correctly? 

••• See the operation manual and 

set “INPUT SOURCE” appropriately.

2) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? 

••• Set it to “CVBS”, “Y/C” or “RGB”.

3) Is ANT-CABLE disconnected or connected improperly? 

••• Connect it correctly as per the operation manual.

4) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.

When sent by component, etc., that signal is not sent to the monitor.

5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching).

The picture of the last selected TV channel is always sent to EXT1. (Specification)

                                             
Is video signal sent to pin (40) of SCART2 (J1101)?

YES

Check SCART2, external connection or input setting. 

NO

Is video signal (V-OUT2) sent from pin (2) of IC1101 (SW)?

YES

Check SCART2 (J1101) and peripheral circuits.   

NO

Is video signal (V-OUT2) sent from pin (194) of IC3002 (VCT)? 

YES

Check IC1101 (SW), Connector (P1102, SC2703) and peripheral 
circuits.

NO

Is video signal (VIN1) from EXT1 sent to pin (190) of IC3002 
(VCT)?

YES

Check power supply of IC3002 (VCT) and peripheral circuits.

NO

Check whether video signal is sent to pin (20) of SCART1. 

YES

Check SCART1, IC2702 (SW), CONNECTOR (SC2702, P1101) 
and peripheral circuits.

NO

Check SCART1, external connection or input setting.