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LC-26SA1E/RU, LC-32SA1E/RU

6 – 2

                
No audio output during UHF/VHF reception

                
Checklist;
1) Is the volume set to MIN or MUTE on the remote control? 

••• Set the desired volume.

2) Are headphones connected to HEADPHONE (J1301)? 

••• Disconnect them.

3) Is ANT-CABLE disconnected or connected improperly? 

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

                
Is the audio signal (L/R) 
sent from pins (28) and 
(27) of IC3002 (VCT)?

NO

Is the SIF signal (SIF_IN+) 
sent to pin (31) of IC3002 
(VCT)?

YES

Check whether +5V and 
+8V are supplied to pins 
(33) and (18) of IC3002 
respectively. Or, check 
peripheral circuits.

(AV-UNIT)

YES

NO

Is the audio signal of pins 
(3) and (5) of IC303
(OP-AMP) sent properly? 

NO

Check IC303 or 
peripheral circuits. 

Is the audio signal (SIF) 
sent from pin (1) of 
CONNECTOR (SC2705)?

YES

Check pin (31) of IC3002 
(VCT) and peripheral 
circuits.

YES

(TUNER) NO

Is the audio signal of pin 
(4) Of IC301/IC302 
(AUDIO-AMP) sent 
properly? 

NO

Check HEAD-PHONE 
(J1301) or peripheral 
circuits. 

Is the audio signal (SIF) 
sent from pin (12) of IC201 
(IF-DEMOD)?

YES

Check Q203 (AMP) and 
peripheral circuits.

YES

NO

Is the audio signal output 
of pins (2) and (4) of P301 
(AUDIO-CONNECTOR) 
normal?

NO

Check P301 (AUDIO- 
CONNECTOR) and 
peripheral circuits. 

Is the SIF signal sent to 
pins (23) and (24) of IC201 
(IF-DEMOD)?

YES

Check IC201 and 
peripheral circuits.

YES

NO

Check Speaker (right and 
left) and wire harness.

Is the IF signal sent from 
pin (11) of TUNER 
(TU201)?

YES

Check FL202 and 
peripheral circuits.

NO

 

Check whether 33V and 
5V are supplied to pins (9) 
and (7) of TUNER (TU201) 
respectively. Check SDA/
SCL and AGC signal.

YES

Replace TUNER (TU201).

     LC-26SA1E/RU, LC-32SA1E/RU

6 – 3

                                             
No sound from an external input device connected to EXT1 
(SCART1).

                                             
<EXT1>
Is IN1-L audio signal sent from pin (6) of SCART1 terminal 
(J1101) to pin (14) of IC3002 (VCT)?
Is IN1-R audio signal sent from pin (2) of SCART1 terminal 
(J1101) to pin (13) of IC3002 (VCT)?

NO

Check pins (6) and (2) of SCART1 and connection to an external 
input device.

YES

Is the audio signal properly sent from pins (28) and (27) of 
IC3002?

NO

Check IC3002 or peripheral circuits.

YES

Is the audio signal of pins (1) and (7) of IC303 (OP-AMP) sent 
properly?

NO

Check IC303 or peripheral circuits.

YES

Is the audio output signal of pins (13) and (16) of IC302/IC301 
(MAIN-AMP) normal?

NO

Check IC302/IC301 (MAIN-AMP), HEADPHONE and peripheral 
circuits.

YES

Check CONNECTOR (P301) and Speaker (right and left).

                                             
No sound from an external   input device connected to EXT2 
(SCART2). 

                                             
<EXT2>
Is IN2-L audio signal sent from pin (27) of SCART2 terminal 
(J1101) to pin (12) of IC3002 (VCT)?
Is IN2-R audio signal sent from pin (23) of SCART2 terminal 
(J1101) to pin (11) of IC3002 (VCT)?

NO

Check pins (27) and (23) of SCART2 and connection to an 
external input device.

YES

Is the audio signal properly sent from pins (28) and (27) of 
IC3002?

NO

Check IC3002 or peripheral circuits.

YES

Is the audio signal of pins (1) and (7) of IC303 (OP-AMP) sent 
properly?

NO

Check IC303 or peripheral circuits.

YES

Is the audio output signal of pins (13) and (16) of IC302/IC301 
(MAIN-AMP) normal?

NO

Check IC302/IC301 (MAIN-AMP), HEADPHONE and peripheral 
circuits.

YES

Check CONNECTOR (P301) and Speaker (right and left).

LC-26SA1E/RU, LC-32SA1E/RU

6 – 4

                                             
No sound from an external input device connected to EXT3.

                                             
<EXT3>
Is IN3-L audio signal sent from pin (3) of J1201 terminal to pin 
(16) of IC3002? 
Is IN3-R audio signal sent from pin (5) of J1201 terminal to pin 
(15) of IC3002? 

NO

Check pins (3) (J1201) and (5) (J1201) of EXT3 and connection 
to an external input device. 

YES

Is the audio signal properly sent from pins (28) and (27) of 
IC3002?

NO

Check IC3002 or peripheral circuits.

YES

Is the audio signal of pins (1) and (7) of IC303 (OP-AMP) sent 
properly?

NO

Check IC303 or peripheral circuits.

YES

Is the audio output signal of pins (13) and (16) of IC302/IC301 
(MAIN-AMP) normal?

NO

Check IC302/IC301 (MAIN-AMP), HEADPHONE and peripheral 
circuits.

YES

Check CONNECTOR (P301) and Speaker (right and left).

                                             
No sound from EXT4 (AUDIO) connecting an external input 
device.

                                             
<EXT4>
Is D-SUB-L audio signal sent from J2702 to pin (15) of IC2704? 
Is D-SUB-R audio signal sent from J2702 to pin (2) of IC2704?

YES

Is D-SUB-L audio signal sent to pin (10) of IC3002? 
Is D-SUB-R audio signal sent to pin (9) of IC3002?

YES

Is the audio signal properly sent from pins (28) and (27) of 
IC3002?

NO

Check IC3002 or peripheral circuits.

YES

Is the audio signal of pins (1) and (7) of IC303 (OP-AMP) sent 
properly?

NO

Check IC303 or peripheral circuits.

YES

Is the audio output signal of pins (13) and (16) of IC302/IC301 
(MAIN-AMP) normal?

NO

Check IC302/IC301 (MAIN-AMP), HEADPHONE and peripheral 
circuits.

YES

Check CONNECTOR (P301) and Speaker (right and left).

     LC-26SA1E/RU, LC-32SA1E/RU

6 – 5

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

                                             
<EXT5>
Is HDMI-L audio signal sent from J2701 to pin (14) of IC2704?
Is HDMI-R audio signal sent from J2701 to pin (5) of IC2704? 

YES

Is HDMI-L audio signal sent to pin (10) of IC3002? 
Is HDMI-R audio signal sent to pin (9) of IC3002?

NO

Check output of pins (13) and (3) of IC2704 and peripheral 
circuits. 

YES

Check that Option-HDMI Setup-Audio select is set to “Analog”.

                                            

OK

Is the audio signal properly sent from pins (28) and (27) of 
IC3002?

NO

Check IC3002 or peripheral circuits.

YES

Is the audio signal of pins (1) and (7) of IC303 (OP-AMP) sent 
properly?

NO

Check IC303 or peripheral circuits.

YES

Is the audio output signal of pins (13) and (16) of IC302/IC301 
(MAIN-AMP) normal?

NO

Check IC302/IC301 (MAIN-AMP), HEADPHONE and peripheral 
circuits.

YES

Check CONNECTOR (P301) and Speaker (right and left).

                                             
No audio output from the headphones.

                                             
Is there audio output on pins (2) and (3) of the headphone 
terminal (J1301)?

NO

Is audio input/output signal of pins (3) and (5)/(1) and (7) of IC303 
(OP-AMP) normal? 

NO

Is audio output signal (SPK-OUT L/R) properly sent from pins 
(28) and (27) of IC3002 (VCT)?

NO

Check audio input signal of pin (31) of IC3002 (VCT), pins (18) 
and (33) of the power line, pins (84) and (83) of I2C-LINE, and 
peripheral circuits.