DOWNLOAD Sharp LC-32GD8EK (serv.man10) Service Manual ↓ Size: 336.25 KB | Pages: 17 in PDF or view online for FREE

Model
LC-32GD8EK (serv.man10)
Pages
17
Size
336.25 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Troubleshooting Tables
File
lc-32gd8ek-sm10.pdf
Date

Sharp LC-32GD8EK (serv.man10) Service Manual ▷ View online

50
 LC-26GA5E
 LC-32GA5E
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
34
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
<When EXT1 is used for external input>
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 "EXT1".
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.
No EXT1-RGB output of the external input 
system.
No EXT1-Y/C output of the external input 
system.
NO
Is composite video 
signal sent to pin 
(20) of SCART1 
(J1101)?
Check external 
connection, input 
setting, SCART1 
(J1101) and 
peripheral circuits.
Is RGB signal sent 
to pins (15), (11) 
and (7) of SCART1 
(J1101)?
NO
Check external 
connection, input 
setting, SCART1 
(J1101) and 
peripheral circuits.
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
YES
YES
NO
Is composite video 
signal (VIN_1) 
sent to input 
terminal pin (6) of 
IC2702 (SW)?
Check 
CONNECTOR 
(SC2702/P1101),
SCART1 (J1101) 
and peripheral 
circuits.
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.
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
NO
Is composite video 
signal
(CVBS1=VIN2)
sent to input 
terminal pin (190) 
of IC3002 (VCT)?
Check IC2702 
(SW) and 
peripheral circuits.
YES
NO
YES
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)?
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
YES
Replace LCD-CONT-UNIT.
YES
NO
NO
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)?
Check CONNECTOR (P2305, CN1) and 
Harness Wire (LV).
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
No picture on the display (3)
 Check HARNESSWIRE (LV).
 Is IC 1705 supplying LCD 5V?
   NO
 Check IC1705 and peripheral parts.
   YES
   NO
 Change IC1705.
 Is LCD5V supplied to pins (31) - (28) of 
 CONNECTOR (P2305)?
   YES
Troubleshooting Table (continued)
51
 LC-26GA5E
 LC-32GA5E
LC-32GD8E/RU  
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
35
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
<When EXT2 is used for external input>
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.
No EXT2-RGB output of the external input 
system.
No EXT2-Y/C output of the external input 
system.
NO
Is composite video 
signal sent to pin 
(41) of SCART2 
(J1101)?
Check external 
connection, input 
setting, SCART2 
(J1101) and 
peripheral circuits.
Is RGB signal sent 
to pins (36), (32) 
and (28) of 
SCART2 (J1101)?
NO
Check external 
connection, input 
setting, SCART2 
(J1101) and 
peripheral circuits.
Is Y/C signal sent 
to pins (41) and 
(36) of SCART2 
(J1101)?
NO
Check external 
connection, input 
setting, SCART2 
(J1101) and 
peripheral circuits.
YES
YES
YES
NO
Is composite video 
signal (VIN_2) 
sent to input 
terminal pin (4) of 
IC2702 (SW)?
Check
CONNECTOR 
(SC2702/P1101), 
SCART2 (J1101) 
and peripheral 
circuits.
Is RGB signal 
(R2/G2/B2=VIN_1
5/16/17) sent to 
input terminal pins 
(178), (177) and 
(176) of IC3002 
(VCT)?
NO
Check
CONNECTOR 
(SC2702/P1101), 
SCART2 (J1101) 
and peripheral 
circuits.
Is Y/C signal 
(VIN2=Y2/C2) sent 
to input terminal 
pins (190) and 
(178) of IC3002 
(VCT)?
NO
Check
CONNECTOR 
(SC2702/P1101), 
SCART2 (J1101) 
and peripheral 
circuits.
YES
NO
Is composite video 
signal
(CVBS2=VIN2)
sent to input 
terminal pin (190) 
of IC3002 (VCT)?
Check IC2702 
(SW) and 
peripheral circuits.
YES
NO
YES
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)?
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
YES
Replace LCD-CONT-UNIT.
YES
NO
NO
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)?
Check CONNECTOR (P2305, CN1) and 
Harness Wire (LV).
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
No picture on the display (4)
 Check HARNESSWIRE (LV).
 Is IC 1705 supplying LCD 5V?
   NO
 Check IC1705 and peripheral parts.
   YES
   NO
 Change IC1705.
 Is LCD5V supplied to pins (31) - (28) of 
 CONNECTOR (P2305)?
   YES
Troubleshooting Table (continued)
52
 LC-26GA5E
 LC-32GA5E
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
36
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
NO
NO
NO
YES
YES
Is composite video signal sent to 
pin (1) of A/V-IN-TERMINAL 
(J1201)?
Check external connection, 
input setting, A/V-IN-TERMINAL 
(J1201) and peripheral circuits.
YES
Is composite video signal (IN3-
CVBS) sent to input terminal pin 
(4) of IC1201 (SW)?
Check A/V-IN-TERMINAL 
(J1201) and peripheral circuits.
Is composite video signal 
(CVBS=VIN7) sent to input 
terminal pin (184) of IC3002 
(VCT)?
Check CONNECTOR 
(SC2703/P1102), IC3002 (VCT) 
and peripheral circuits.
NO
NO
YES
YES
Is Y/C signal sent to pins (11) 
and (7) of S-TERMINAL 
(J1201)?
Check external connection, 
input setting, S-TERMINAL 
(J1201) and peripheral circuits.
YES
YES
Is Y3 signal (IN3-Y) sent to input 
terminal pin (6) of IC1201 (SW)?
Is Y/C signal (VIN7/VIN8) sent to 
input terminal pins (184) and 
(183) of IC3002 (VCT)?
Check S-TERMINAL (J1201) 
and peripheral circuits.
NO
Check CONNECTOR 
(SC2703/P1102), IC3002 (VCT) 
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
YES
                                                                   Replace LCD-CONT-UNIT.
<When EXT3 is used for external input>
No EXT3 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 "EXT3".
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.
No EXT3-Y/C output of the 
external input system.
No picture on the display (5)
 Check HARNESSWIRE (LV).
 Is IC 1705 supplying LCD 5V?
   NO
   YES
 Check IC1705 and peripheral parts.
   YES
   NO
 Change IC1705.
 Is LCD5V supplied to pins (31)  -   
 (28) of  CONNECTOR (P2305)?
Troubleshooting Table (continued)
53
 LC-26GA5E
 LC-32GA5E
LC-32GD8E/RU  
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU  
LC-32/37BT8E/RU
37
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
 (Continued)
NO
NO
NO
YES
YES
Is "EXT4" selected with
button on the remote control?
Select "EXT4" with        button 
on the remote control.
YES
Is D-SUB-COMPONENT signal 
(PCV_R/G/B) sent to pins (1), 
(2) and (3) of EXT4-TERMINAL 
(SC2303)?
Check D-SUB-adaptor and 
external connection.
Is D-SUB-COMPONENT signal 
(PCV_R/G/B=VIN19/20/21))
sent to pins (174), (173) and 
(172) of IC3002 (VCT)?
Check EXT4-TERMINAL 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 Hareness Wire (LV).
YES
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
NO
                                                                      Replace LCD-CONT-UNIT.
<When EXT4 is used for external input>
No EXT4 (15pin-D-SUB-terminal) 
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 "EXT4".
2) Connect the included D-SUB-Adapter-Cable to the COMPONENT terminal of an external device.  ··· See the operation manual (use a commercially 
    available Component-Cable to connect to the external device).
3) Is ANT-CABLE disconnected or connected improperly? ··· Connect it correctly as per the operation manual.
No picture on the display (6)
YES
 Check HARNESSWIRE (LV).
 Is IC 1705 supplying LCD 5V?
   NO
   YES
 Check IC1705 and peripheral parts.
   YES
   NO
 Change IC1705.
 Is LCD5V supplied to pins (31)  -   
 (28) of  CONNECTOR (P2305)?
Troubleshooting Table (continued)
Page of 17
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