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LC-19A1E-BK/WH

4 – 9

                                            
No sound from EXT5 (AUDIO) connecting an external input 
device.

                                            
<EXT5>
Is PC-S-L audio signal input from J401 to pin (7) of IC301?
Is PC-S-R audio signal input from J401 to pin (3) of IC301?

YES

Is PC-S-L audio signal input to pin (42) of IC501 (AV-SW)? 
Is PC-S-R audio signal input to pin (40) of IC501 (AV-SW)? 

NO

Check Connector SC1202 pins (9) and (10), Connector SC501 
pins (9) and (10) and short circuit.

YES

Is the audio signal (TERMINAL-L/R) properly output from pins 
(34) and (33) of IC501 (AV-SW)? 

NO

Check the Power supply input of pin(38) of IC501, or SDA2/SCL2 
signal of pins (28) and (29) or peripheral circuits.

YES

Is the audio signal (INLP/INRP) output properly from pins (25) 
and (23) of IC302 (A-CODEC)? 

NO

Check pins (4) and (1) of IC302 (A-CODEC), pins (12) and (11) of 
Connector SC1202, audio-mute line (Q301/Q302) or peripheral 
circuits.

YES

Is the audio signal L-CH output to pins (44-46) and (39-41) of 
IC303 (POWER-AMP)? Is the audio signal R-CH output to pins 
(20-22) and (15-17) of IC303 (POWER-AMP) normally?

NO

Check UR12V power supply input pins (3) and (48) of IC303 
(POWER-AMP) or peripheral circuits.

YES

Is the audio signal of pins (1)-(4) of SP-Connector (P301) prop-
erly output?

NO

Check SP-CONNECTOR (P301) and short circuit.

YES

Check SP-BOX (right and left) and WIRE HARNESS.

LC-19A1E-BK/WH

4 – 10

                                            
No audio output from headphone (J505).

(AV-UNIT)                             
Is there audio output signal on pins (2) and (3) of the headphone 
terminal (J505)?

YES

Check Headphone terminal (J505) and the connection to an 
external device.

NO

Is “H” signal at base of Q527, Q526? 

YES

Pin (D11) of IC801 (DVP-M2) should usually be “L”.
If “H” signal, check IC801 and peripheral circuits.

(MAIN-UNIT)                         

NO

Is the audio output signal of pins (30) and (29) of IC302 (A-
CODEC) proper? 

YES

Check pins (12) and (11) of Connector SC1203, pins (12) and 
(11) of Connector P502 and peripheral circuits.

(AV-UNIT)                             

NO

Is the audio output signal (TERMINAL-L/R) properly output from 
pins (34) and (33) of IC501 (AV-SW)?

YES

Check pins (12) and (11) of Connector SC1202, pins (12) and 
(11) of Connector P501 and peripheral circuits.

(MAIN-UNIT)                         

NO

Is the audio output signal (MPX-A-L/R) properly output from pins 
(11) and (15) of IC301 (A-Selector)?

YES

Check pins (9) and (10) of Connector SC1202, pins (9) and (10) 
of Connector P501 and peripheral circuits.

NO

Is the audio output signal (DVPM2-L/R) properly output from pins 
(B23) and (D23) of IC801 (DVP-M2)? 

YES

Check the AUDIO signal line between IC301 and IC801, or 
peripheral circuits.

NO

Check the power supply input B3.3V pins (R19) and (D5), B1.5V 
pins (D12) of IC801 (DVP-M2) or peripheral circuits.

                                             
No audio output from EXT1 (SCART1) terminal.

                                             
Checklist:
1) Is the MUTE button on the remote control set to ON? 

• • • Set to OFF.

2) Check the connection to external devices. 

• • • Is there any improper connection?

                                             
Is audio signal output to pins (3) and (1) of EXT1 (SC501)?

YES

Confirm EXT1 (SC501) and the connection to an external eivice.

NO

Is the audio output signal (L/R-OUT) output to pins (7) and (1) of 
IC506 (A-AMP)? 

NO

Is the audio output signal (DVPM2-L/R) properly output from pins 
(B23) and (D23) of IC801 (DVP-M2)? 

YES

Check pins (20) and (21) of Connector SC1202, pins (20) and 
(21) of Connector P501 and peripheral circuits.

NO

Check the power supply B3.3V pins (R19) and (D5), B1.5V pins 
(D12) of IC801 (DVP-M2) or peripheral circuits.

LC-19A1E-BK/WH

4 – 11

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

                                             
Checklist:
1) Is “INPUT SOURCE” button 

 on the remote control set up correctly? 

• • • Set it as “TV” with the INPUT SOURCE button 

 on the remote 

control.

2) Is MENU-Picture-Backlight/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 (11) and (10) of tuner (TU501) at H?

NO

These are communications lines for control (I2C). Follow the 
path and check whether they are forced to L (PULL_DOWN).
(IC801 (A5) (C4) pin) 

YES

Is the video signal (VIDEO) output from pin (17) of tuner 
(TU501)? 

NO

Check the tuner (TU501) and peripheral circuits.

YES

Is the video signal CVBS (MTV-V) input to pin (41) of lC501 (AV-
SW)? 

NO

Isn't there any part with short-circuits at IC501 (AV-SW)?
Check peripheral circuits.

YES

Is the video signal CVBS input to pin (U2) of lC801 (DVP-M2)? 

NO

Check IC501 (AV-SW), pin (18) of Connector SC1202, pin (18) of 
Connect or P501 and peripheral circuits.

YES

Is LVDS video signal (RA

±-RD±) output from pins (P22) (P23) - 

(V22) (V23) of IC801 (DVP-M2), and is RCLK signal (RCLK

±) 

output from pins (U22)/(U23)? 

NO

Check pins (R19)/(D5) of B3.3V line of IC801 (DVP-M2), pins 
(D12) of B1.5V line, pins (B6) (A6) of SDA1/SCL1 line and 
peripheral circuits.

YES

Is RSDS-R/G/B signal (R[0:2]

±,G[0:2]±,B[0:2]±) output to pins 

(53)-(72) of IC9201 (RSDS-TRANSMITTER), and is CLK signal 
(CK

±) output to pins (60) and (59)? 

NO

Check pins (1) and (9) of B3.3V line of IC9201 (RSDS-TRANS-
MITTER), short circuits and peripheral circuits.

YES

Is RSDS-R/G/B signal (R[0:2]

±, G[0:2]±, B[0:2]±) and CLK signal 

(CK

±) input to CONNECTOR SC9201 of LCD-PANEL?

(RSDS-R signal: 22-27pin, RSDS-G signal: 57-62pin, RSDS-B 
signal: 66-71pin, CK

±signal: 33/32pin) 

NO

Check whether there is short-circuit at Connector SC9201 of 
LCD-PANEL and also check peripheral circuits.

YES

Is liquid crystal drive power supply input to CONNECTOR 
SC9201 of LCD-PANEL?
(VLS-B12V=40/41/42pin, VGH=5/6pin, VGL=2/3pin, COM-
BIAS=75/76/77pin) 

NO

Please check REGULATOR-circuit of a defective voltage respec-
tively.

YES

Replace LCD-PANEL.

LC-19A1E-BK/WH

4 – 12

                                             
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 SCART-CABLE disconnected or connected improperly? 

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

3) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.

                                             
Is video signal output to pin (19) of SCART1 (SC501)?

YES

Check SCART1, external connection or input setting.

NO

Is video signal (SCART-OUT) output from pin (22) of IC501 (AV-
SW)? 

YES

Check SCART1 (SC501) and peripheral circuits.

NO

Is video signal (VIDEO) output from pin (17) of TUNER (TU501)? 

YES

Check pin (38) of B9V power supply of IC501, 12C-line pins (28) 
and (29) and peripheral circuits.

NO

Check B5V power supply pins (3), 12C-line pins (11) and (10) of 
tuner (TU501) and peripheral circuits.