DOWNLOAD Sharp LC-19D1EWH (serv.man5) Service Manual ↓ Size: 1.14 MB | Pages: 24 in PDF or view online for FREE

Model
LC-19D1EWH (serv.man5)
Pages
24
Size
1.14 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting Table
File
lc-19d1ewh-sm5.pdf
Date

Sharp LC-19D1EWH (serv.man5) Service Manual ▷ View online

LC-19D1E/S-BK/WH
4 – 6
No sound (2) (during the reception of TV broadcasting)
                                    
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) Is ANT-CABLE disconnected or connected improperly? 
• • • Connect it correctly as per the operation manual.
(AV-UNIT)                                     
YES
Is the audio signal (L/R) output from pins (34) and (33) of IC501 
(AV-SW)?
NO
(MAIN-UNIT)                 
YES
Is the audio signal (LOUT2/ROUT2) output form pins 
(25)  and (23) of  IC302 (A-CODEC) properly?  
NO
Check pins (1) and (4) of  IC302 (A-CODEC), pins (11) and (12) 
of Connector SC1202,audio-mute line (Q301/Q302) or peripheral  
circuits.
YES
Is the audio signal L-CH output to  pins    (44-45) and 
(40-41) of  IC303 (POWER-AMP) and also the audio 
signal R-CH output to  pins  (21-22) and (16-17) of  
IC303 (POWER-AMP) properly?  
NO
Check  UR12V power supply input pins (47) and (14)  of  IC303 
(POWER-AMP) or peripheral circuits.
YES
Is the audio signal of pins (1), (2), (3) and (4) of P301 
(SP-Connector) output normally? 
NO
Check SP- Connector (P301) and peripheral circuits. 
YES
Check SP-BOX (right and left) and WIRE HARNESS. 
(MAIN-UNIT)
Is the MPX/PC/HDMI_A_L/R signal output to pins (11) and (15) 
of IC301 (A-Selector)? 
YES
Check either pins (9) and(10) of Connector SC1202 or pins (9) 
and(10) of Connector P501. Or check peripheral circuits.
                                    
NO
Is the audio signal (DVPM2_L/R) output from pins (B23) and 
(D23) of IC801 (DVP-M2)?
YES
Check pins of  (6) and (1) of IC301 (A-Selector), pin(14) of power 
supply 9V  and peripheral circuits.
                                    
NO
Is the audio signal (SIF) input to pin (A21) of IC801 (DVP-M2)?
YES
Check the power supply B1.5V pins (C18) and B3.3V pins (A18)/
(A22) are supplied to IC801 (DVP-M2).
Or check peripheral circuits.
(AV-UNIT)                                    
NO
Is the SIF signal output from pin (12)  of  Q210(BUFFER)?
YES
Confirm pin (7) of Connector  SC1202 or pin (7) of  Connector 
P501. Or please check the peripheral circuit.
Is the SIF signal output from pin (4)  of  Tuner (TU201)?
YES
Check Q203,Q210 and peripheral circuit. 
                                    
NO
Check the B5V/B5V(CONT)/IF5V power supply input pin (11)/(1)/
(3) of TUNER (TU201), SDA/SCA signal pins (9)/(8) and AGC 
signal pin (15).
YES
Replace Tuner (TU201).
LC-19D1E/S-BK/WH
4 – 7
No sound from external input devices (3)-1
                                            
No sound from EXT1 (SCART) connecting an external input 
device.
                                            
<EXT1>
Is SCART-L-IN audio signal input from pin (6) of SCART1 termi-
nal (SC501) to pin (14) of IC501 (AV-SW)?
Is SCART-R-IN audio signal input from pin (2) of SCART1 termi-
nal (SC501) to pin (15) of IC501?
NO
Check pins (6) and (2) of SCART1 and connection to an external 
input device.
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 (LOUT2/ROUT2)  output properly from pins 
(25) and (23) of  IC302  (A-CODEC) ?   
NO
Check pins (1) and (4) of  IC302 (A-CODEC) , pins (11) and (12) 
of  Connector SC1202, audio-mute line (Q301/Q302) or periph-
eral circuits. 
YES
Is the audio  signal L-CH output to  pins  (44-45) and (40-41)  of  
IC303 (POWER-AMP)? Is the audio  signal R-CH output to  pins  
(20-21) and (16-17) of  IC303 (POWER-AMP)  normally ?  
NO
Check UR12V power supply input pins (47) and (14) 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-19D1E/S-BK/WH
4 – 8
No sound from external input devices (3)-2
                                            
No sound from EXT4 (MDMI-AUDIO) connecting an external 
input device.
                                            
<EXT4>
Is HDMI-L audio signal input from J504 to pin (8) of IC301 (A-
Selector)? 
Is HDMI-R audio signal input from J504 to pin (5) of IC301 (A-
Selector)?
YES
Is HDMI-L audio signal input to pin (42) of IC501 (AV-SW)?
Is HDMI-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 (LOUT2/ROUT2)  output properly from pins 
(25) and (23) of  IC302  (A-CODEC) ?  
NO
Check pins (1) and (4) of  IC302 (A-CODEC) , pins (11) and (12) 
of  Connector SC1202, audio-mute line (Q301/Q302) or periph-
eral circuits. 
YES
Is the audio  signal L-CH output to  pins  (44-45) and (40-41)  of  
IC303 (POWER-AMP)? Is the audio  signal R-CH output to  pins  
(20-21) and (16-17) of  IC303 (POWER-AMP)  normally ?    
NO
Check UR12V power supply input pins (47) and (14) 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-19D1E/S-BK/WH
4 – 9
No sound from external input devices (3)-3
                                            
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 (LOUT2/ROUT2)  output properly from pins 
(25) and (23) of  IC302  (A-CODEC) ?   
NO
Check pins (1) and (4) of  IC302 (A-CODEC) , pins (11) and (12) 
of  Connector SC1202, audio-mute line (Q301/Q302) or periph-
eral circuits. 
YES
Is the audio  signal L-CH output to  pins  (44-45) and (40-41)  of  
IC303 (POWER-AMP)? Is the audio  signal R-CH output to  pins  
(20-21) and (16-17) of  IC303 (POWER-AMP)  normally ?     
NO
Check UR12V power supply input pins (47) and (14) 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.  
Page of 24
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