LC-32SA1E (serv.man2) — Sharp TV Service Manual (repair manual). Page 46

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LC-26SA1E/RU, LC-32SA1E/RU
6 – 12
<When EXT1 is used for external input>                            No picture on the display (3) 
                                            
No EXT1-Composite output of the external input system.
                                            
Checklist: 
1) Is “INPUT SOURCE” button 
on the remote control set up correctly? 
••• See the operation manual and set “INPUT SOURCE” to “EXIT”.
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to “MIN”? 
••• Set it to an appropriate level.
3) Check the connection to the external device 
••• Connect it correctly as per the operation manual for the device.
                                            
Is composite video signal sent to pin (20) of SCART1 (J1101)?
NO
Check external connection, input setting, SCART1 and 
peripheral circuits. 
YES
Is composite video signal (VIN_1) sent to input terminal pin (6) of 
IC2702 (SW)? 
NO
Check CONNECTOR (SC2702/P1101), SCART1 (J1101) and 
peripheral circuits.
YES
Is composite video signal (CVBS1=VIN2) sent to input terminal 
pin (190) of IC3002 (VCT)? 
NO
Check IC2702 (SW) and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and 
(140) - (129) and (128) of IC3002 (VCTP), and is CLK signal 
(LVDS_CN/CP) sent from pins (132) and (131)? 
NO
Check pins (192), (170) and (133) of BU3.3V power line and pins 
(185), (169) and (142) of BU1.8V power line of IC3002 (VCTP), 
and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - 
(24) and (25) of CONNECTOR CN1 in LCD-CONT-UNIT, and is 
CLK signal (LVDS_CN/CP) sent to pins (21) and (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 – 13
<When EXT1 is used for external input>                            No picture on the display (3) 
                                            
No EXT1-RGB output of the external input system.
                                            
Checklist: 
1) Is “INPUT SOURCE” button 
on the remote control set up correctly? 
••• See the operation manual and set “INPUT SOURCE” to “EXIT”.
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to “MIN”? 
••• Set it to an appropriate level.
3) Check the connection to the external device 
••• Connect it correctly as per the operation manual for the device.
                                            
Is RGB signal sent to pins (15),(11) and (7) of SCART1 (J1101)?
NO
Check external connection, input setting, SCART1 (J1101) and 
peripheral circuits. 
YES
Is RGB signal (R1/G1/B1=VIN_6/5/9) sent to input terminal pins 
(187), (175) and (182) of IC3002 (VCT)? 
NO
Check CONNECTOR (SC2702/P1101), SCART1 (J1101) and 
peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and 
(140) - (129) and (128) of IC3002 (VCTP), and is CLK signal 
(LVDS_CN/CP) sent from pins (132) and (131)? 
NO
Check pins (192), (170) and (133) of BU3.3V power line and pins 
(185), (169) and (142) of BU1.8V power line of IC3002 (VCTP), 
and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - 
(24) and (25) of CONNECTOR CN1 in LCD-CONT-UNIT, and is 
CLK signal (LVDS_CN/CP) sent to pins (21) and (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 – 14
<When EXT1 is used for external input>                            No picture on the display (3) 
                                            
No EXT1-Y/C output of the external input system.
                                            
Checklist: 
1) Is “INPUT SOURCE” button 
on the remote control set up correctly? 
••• See the operation manual and set “INPUT SOURCE” to “EXIT”.
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to “MIN”? 
••• Set it to an appropriate level.
3) Check the connection to the external device 
••• Connect it correctly as per the operation manual for the device.
                                            
Is Y/C signal sent to pins (20) and (15) of SCART1 (J1101)?
NO
Check external connection, input setting, SCART1 (J1101) and 
peripheral circuits.
YES
Is Y/C signal (VIN1=Y1/C1) sent to input terminal pins (190) and 
(187) of IC3002 (VCT)? 
NO
Check CONNECTOR (SC2702/P1101), SCART1 (J1101) and 
peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and 
(140) - (129) and (128) of IC3002 (VCTP), and is CLK signal 
(LVDS_CN/CP) sent from pins (132) and (131)? 
NO
Check pins (192), (170) and (133) of BU3.3V power line and pins 
(185), (169) and (142) of BU1.8V power line of IC3002 (VCTP), 
and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - 
(24) and (25) of CONNECTOR CN1 in LCD-CONT-UNIT, and is 
CLK signal (LVDS_CN/CP) sent to pins (21) and (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 – 15
<When EXT2 is used for external input>                            No picture on the display (4) 
                                            
No EXT2-Composite output of the external input system.
                                            
Checklist: 
1) Is “INPUT SOURCE” button 
on the remote control set up correctly? 
••• See the operation manual and set “INPUT SOURCE” to “EXT2”.
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to “MIN”? 
••• Set it to an appropriate level.
3) Check the connection to the external device 
••• Connect it correctly as per the operation manual for the device.
                                            
Is composite video signal sent to pin (41) of SCART2 (J1101)?
NO
Check external connection, input setting, SCART2 (J1101) and
peripheral circuits. 
YES
Is composite video signal (VIN-2) sent to input terminal pin (4) of
IC2702 (SW)? 
NO
Check CONNECTOR (SC2702/Pl101), SCART2 (J1101) and 
peripheral circuits.
YES
Is composite video signal (CVBS2=VIN2) sent to input terminal 
pin (190) of IC3002 (VCT)? 
NO
Check IC2702 (SW) and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and 
(140) - (129) and (128) of IC3002 (VCTP), and is CLK signal 
(LVDS_CN/CP) sent from pins (132) and (131)? 
NO
Check pins (192), (170) and (133) of BU 3.3V power line and 
pins (185), (169) and (142) of BU1.8V power line of IC3002 
(VCTP), and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - 
(24) and (25) of CONNECTOR CN1 in LCD-CONT-UNIT, and is 
CLK signal (LVDS_CN/CP) sent to pins (21) and (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 – 16
<When EXT2 is used for external input>                            No picture on the display (4) 
                                            
No EXT2-RGB output of the external input system.
                                            
Checklist: 
1) Is “INPUT SOURCE” button 
on the remote control set up correctly? 
••• See the operation manual and set “INPUT SOURCE” to “EXT2”.
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to “MIN”? 
••• Set it to an appropriate level.
3) Check the connection to the external device 
••• Connect it correctly as per the operation manual for the device.
                                            
Is RGB signal sent to pins (36), (32) and (28) of SCART2 
(J1101)?
NO
Check external connection, input setting, SCART2 (J1101) and 
peripheral circuits. 
YES
Is RGB signal (R2/G2/B2=VIN_15/16/17) sent to Input terminal 
pins (178), (177) and (176) of IC3002 (VCT)? 
NO
Check CONNECTOR (SC2702/P1101), SCART2 (J1101) and 
peripheral circuits. 
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and 
(140) - (129) and (128) of IC3002 (VCTP), and is CLK signal 
(LVDS_CN/CP) sent from pins (132) and (131)? 
NO
Check pins (192), (170) and (133) of BU 3.3V power line and 
pins (185), (169) and (142) of BU1.8V power line of IC3002 
(VCTP), and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - 
(24) and (25) of CONNECTOR CN1 in LCD-CONT-UNIT, and is 
CLK signal (LVDS_CN/CP) sent to pins (21) and (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.

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