LC-32SA1E (serv.man2) — Sharp TV Service Manual (repair manual). Page 41

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     LC-26SA1E/RU, LC-32SA1E/RU
6 – 7
No sound except from speakers (3)
                                            
No audio output from AUDIO OUTPUT 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 sent to pins (13) and (15) [L/R (white) (red)] of 
AUDIO OUTPUT terminal (J1201)?
YES
Check the connection to AUDIO OUTPUT terminal (J1201) and 
external devices.
                                            
NO
Is S-MUTE-LINE [IC1710 (pin 100)] at H?
(Check Q1204/Q1203 operation.) 
                                            
NO
Is audio signal sent from pins (22) and (21) of IC3002?
NO
Check the power supply 8/5 V pins (18) and (33) of IC3002 and 
peripheral circuits.
YES
Check the audio signal output line from pins (22) and (21) of 
IC3002 to Q1103/Q1104/Q1201/Q1202.
LC-26SA1E/RU, LC-32SA1E/RU
6 – 8
<On input of the tuner (U/V)>                                                  No picture on the display (1) 
                                            
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 (4) and (5) 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 (11) 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 (VCTP), and is CLK signal 
(LVDS_CN/CP) sent to pins (132)/(131)? 
NO
Check pins (192)/(170)/(133) of BU3.3V line of IC3002 (VCTP), 
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 (2) - (5) 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-26SA1E/RU, LC-32SA1E/RU
6 – 9
<During external connection>                                           No picture on the monitor (2) 
                                            
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 (11) of tuner (TU201)? 
YES
Check IC201, FL201 (SAW-FIL), Q202 and peripheral circuits.
NO
Check 5/35 V power supply pins (7) and (9), I2C line pins (5) and 
(4) of tuner (TU201) and peripheral circuits.
LC-26SA1E/RU, LC-32SA1E/RU
6 – 10
<During external connection>                                           No picture on the monitor (2)
                                            
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.
     LC-26SA1E/RU, LC-32SA1E/RU
6 – 11
<During external connection>                                           No picture on the monitor (2) 
                                            
SCART2:
No picture from EXT3 appears on EXT2- connected monitor.
                                            
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 (VIN7) from EXT3 sent to pin (184) of IC3002 
(VCT)? 
YES
Check power supply of IC3002 (VCT) and peripheral circuits.
NO
Is video signal (IN3YV) sent to pin (2) of IC1201 (SW)? 
YES
Check pin (184) of IC3002 (VCT), CONNECTOR (SC2703, 
P1102) and peripheral circuits.
NO
Is video signal (CVBS) sent from pin (1) of A/V-TERMINAL 
(J1201=EXT3)?
YES
Check pin (1) (IN3SW) of IC1201 (SW), power supply and 
peripheral circuits.
NO
Check A/V-TERMINAL (J1201), external connection or input 
setting.

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