Sharp LC-32GD8EK (serv.man10) Service Manual ▷ View online
48
LC-26GA5E
LC-32GA5E
LC-32/37GD8E/RU
LC-32/37BT8E/RU
32
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
(Continued)
<On input of the tuner>
(U/V)>
No picture appears on LCD during the tuner reception.
(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.
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.
NO
Is level of pins (4) and (5) of
tuner (TU201) and pins (10)
and (11) of IC201 (IF-
DEMOD) at H?
tuner (TU201) and pins (10)
and (11) of IC201 (IF-
DEMOD) at H?
These are communications
lines for control (I2C). Follow
the path and check whether
they are forced to L
(PULL_DOWN).
lines for control (I2C). Follow
the path and check whether
they are forced to L
(PULL_DOWN).
YES
NO
Is the video signal (IF) sent
from pin (8) of tuner
(TU201)?
from pin (8) of tuner
(TU201)?
Check the tuner (TU201)
and peripheral circuits.
and peripheral circuits.
NO
YES
YES
YES
Is video signal sent from pin
(17) of IC201 (IF-DEMOD)?
(17) of IC201 (IF-DEMOD)?
Check FL201 (SAW-FIL),
IC201 and peripheral
circuits.
IC201 and peripheral
circuits.
NO
Is the video signal VIN1
(ATUNER-CVBS) sent to pin
(191) of IC3002 (VCT)?
(ATUNER-CVBS) sent to pin
(191) of IC3002 (VCT)?
Check IC201 (IF-DEMOD),
CONNECTOR
(P201/SC2705) and
peripheral circuits.
CONNECTOR
(P201/SC2705) and
peripheral circuits.
NO
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)?
(141)/(140) - (129)/(128) of IC3002 (VCTP), and is CLK signal
(LVDS_CN/CP) sent to pins (132)/(131)?
Check pins (192)/(170)/(133) of BU3.3V line of IC3002 (VCTP),
pins (185)/(169)/(142) of 1.8V line and peripheral circuits.
pins (185)/(169)/(142) of 1.8V line and peripheral circuits.
NO
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)?
(24)/(25) of CONNECTOR CN1 of LCD-CONT-UNIT, and is CLK
signal (LVDS_CN/CP) sent to pins (21)/(22)?
Check CONNECTOR (P2305, CN1) and HARNESSWIRE (LV).
NO
YES
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1
in LCD-CONT-UNIT?
in LCD-CONT-UNIT?
YES
Replace LCD-CONT-UNIT.
Is LCD5V supplied to pins (31) – (28) of CONNECTOR (P2305)?
No picture on the display (1)
Check HARNESSWIRE (LV).
Is IC 1705 supplying LCD 5V?
NO
Check IC1705 and peripheral parts.
YES
NO
Change IC1705.
YES
Troubleshooting Table (continued)
49
LC-26GA5E
LC-32GA5E
LC-32GD8E/RU
LC-32BT8E/RU
LC-37GD8E/RU
LC-37BT8E/RU
LC-32/37GD8E/RU
LC-32/37BT8E/RU
33
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
(Continued)
<During external connection>
SCART1:
No picture appears on EXT1-connected
monitor during the tuner reception.
No picture appears on EXT1-connected
monitor during the tuner reception.
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.
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.
SCART2:
No picture from EXT3 appears on EXT2-
connected monitor.
No picture from EXT3 appears on EXT2-
connected monitor.
YES
Is video signal
sent to pin (19) of
SCART1 (J1101)?
sent to pin (19) of
SCART1 (J1101)?
Check SCART1,
external
connection or input
setting.
external
connection or input
setting.
Is video signal
sent to pin (40) of
SCART2 (J1101)?
sent to pin (40) of
SCART2 (J1101)?
YES
Check SCART2,
external
connection or input
setting.
external
connection or input
setting.
Is video signal
sent to pin (40) of
SCART2 (J1101)?
sent to pin (40) of
SCART2 (J1101)?
YES
Check SCART2,
external
connection or input
setting.
external
connection or input
setting.
NO
NO
NO
No picture on the monitor (2)
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 set to the same as that of the 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)
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 set to the same as that of the 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)
YES
Is video signal (V-
OUT1) sent from
pin (2) of IC1102
(SW)?
OUT1) sent from
pin (2) of IC1102
(SW)?
Check SCART1
(J1101) and
peripheral circuits.
(J1101) and
peripheral circuits.
Is video signal (V-
OUT2) sent from
pin (2) of IC1101
(SW)?
OUT2) sent from
pin (2) of IC1101
(SW)?
YES
Check SCART2
(J1101) and
peripheral circuits.
(J1101) and
peripheral circuits.
Is video signal (V-
OUT2) sent from
pin (2) of IC1101
(SW)?
OUT2) sent from
pin (2) of IC1101
(SW)?
YES
Check SCART2
(J1101) and
peripheral circuits.
(J1101) and
peripheral circuits.
NO
NO
NO
YES
Is video signal (V-
OUT1) sent from
pin (195) of
IC3002 (VCT)?
OUT1) sent from
pin (195) of
IC3002 (VCT)?
Check IC1102
(SW), Connector
(P1101, SC2702)
and peripheral
circuits.
(SW), Connector
(P1101, SC2702)
and peripheral
circuits.
Is video signal (V-
OUT2) sent from
pin (194) of
IC3002 (VCT)?
OUT2) sent from
pin (194) of
IC3002 (VCT)?
YES
Check IC1101
(SW), Connector
(P1102, SC2703)
and peripheral
circuits.
(SW), Connector
(P1102, SC2703)
and peripheral
circuits.
Is video signal (V-
OUT2) sent from
pin (194) of
IC3002 (VCT)?
OUT2) sent from
pin (194) of
IC3002 (VCT)?
YES
Check IC1101
(SW), Connector
(P1102, SC2703)
and peripheral
circuits.
(SW), Connector
(P1102, SC2703)
and peripheral
circuits.
NO
NO
NO
YES
Is video signal
(CVBS) sent to pin
(191) of IC3002
(VCT)?
(CVBS) sent to pin
(191) of IC3002
(VCT)?
Check power
supply of IC1102
(SW), Connector
(P1101, SC2702)
and peripheral
supply of IC1102
(SW), Connector
(P1101, SC2702)
and peripheral
Is video signal
(VIN1) from EXT1
sent to pin (190) of
IC3002 (VCT)?
(VIN1) from EXT1
sent to pin (190) of
IC3002 (VCT)?
YES
Check power
supply of IC1101
(SW), Connector
(P1102, SC2703)
and peripheral
supply of IC1101
(SW), Connector
(P1102, SC2703)
and peripheral
Is video signal
(VIN7) from EXT3
sent to pin (184) of
IC3002 (VCT)?
(VIN7) from EXT3
sent to pin (184) of
IC3002 (VCT)?
YES
Check power
supply of IC1101
(SW), Connector
(P1102, SC2703)
and peripheral
supply of IC1101
(SW), Connector
(P1102, SC2703)
and peripheral
NO
NO
NO
YES
Is video signal
(CVBS) sent from
pin (17) of IC201
(IF-DEMOD)?
(CVBS) sent from
pin (17) of IC201
(IF-DEMOD)?
Check
CONNECTOR
(P201, SC2705) and
peripheral circuits.
CONNECTOR
(P201, SC2705) and
peripheral circuits.
Check whether
video signal is sent
to pin (20) of
SCART1.
video signal is sent
to pin (20) of
SCART1.
YES
Check SCART1,
IC2702 (SW),
CONNECTOR
(SC2702, P1101)
and peripheral
circuits.
IC2702 (SW),
CONNECTOR
(SC2702, P1101)
and peripheral
circuits.
Is video signal
(IN3YV) sent to pin
(2) of IC1201
(SW)?
(IN3YV) sent to pin
(2) of IC1201
(SW)?
YES
Check pin (184) of
IC3002 (VCT),
CONNECTOR
(SC2703, P1102)
and peripheral
circuits.
IC3002 (VCT),
CONNECTOR
(SC2703, P1102)
and peripheral
circuits.
NO
NO
NO
YES
Is video signal (IF)
sent from pin (8) of
tuner (TU201)?
sent from pin (8) of
tuner (TU201)?
Check IC201,
FL201 (SAW-FIL),
Q202 and
peripheral circuits.
FL201 (SAW-FIL),
Q202 and
peripheral circuits.
Check SCART1,
external
connection or input
setting.
external
connection or input
setting.
Is video signal
(CVBS) sent from
pin (1) of A/V-
TERMINAL
(J1201)? (EXT3)
(CVBS) sent from
pin (1) of A/V-
TERMINAL
(J1201)? (EXT3)
YES
Check pin (1)
(IN3SW) of IC1201
(SW), power
supply and
peripheral circuits.
(IN3SW) of IC1201
(SW), power
supply and
peripheral circuits.
NO
Check A/V-
TERMINAL
(J1201), external
connection or input
setting.
TERMINAL
(J1201), external
connection or input
setting.
NO
Check 5/5 (CONT) V power supply pins (7)
and (1), I2C line pins (5) and (4) of tuner
(TU201) and peripheral circuits.
and (1), I2C line pins (5) and (4) of tuner
(TU201) and peripheral circuits.
Troubleshooting Table (continued)
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.
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.
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.
system.
No EXT1-Y/C output of the external input
system.
system.
NO
Is composite video
signal sent to pin
(20) of SCART1
(J1101)?
signal sent to pin
(20) of SCART1
(J1101)?
Check external
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
Is RGB signal sent
to pins (15), (11)
and (7) of SCART1
(J1101)?
to pins (15), (11)
and (7) of SCART1
(J1101)?
NO
Check external
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
Is Y/C signal sent
to pins (20) and
(15) of SCART1
(J1101)?
to pins (20) and
(15) of SCART1
(J1101)?
NO
Check external
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
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)?
signal (VIN_1)
sent to input
terminal pin (6) of
IC2702 (SW)?
Check
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
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)?
(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.
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)?
(VIN1=Y1/C1) sent
to input terminal
pins (190) and
(187) of IC3002
(VCT)?
NO
Check
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
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)?
signal
(CVBS1=VIN2)
sent to input
terminal pin (190)
of IC3002 (VCT)?
Check IC2702
(SW) and
peripheral circuits.
(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)?
(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.
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)?
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).
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.
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.
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.
system.
No EXT2-Y/C output of the external input
system.
system.
NO
Is composite video
signal sent to pin
(41) of SCART2
(J1101)?
signal sent to pin
(41) of SCART2
(J1101)?
Check external
connection, input
setting, SCART2
(J1101) and
peripheral circuits.
connection, input
setting, SCART2
(J1101) and
peripheral circuits.
Is RGB signal sent
to pins (36), (32)
and (28) of
SCART2 (J1101)?
to pins (36), (32)
and (28) of
SCART2 (J1101)?
NO
Check external
connection, input
setting, SCART2
(J1101) and
peripheral circuits.
connection, input
setting, SCART2
(J1101) and
peripheral circuits.
Is Y/C signal sent
to pins (41) and
(36) of SCART2
(J1101)?
to pins (41) and
(36) of SCART2
(J1101)?
NO
Check external
connection, input
setting, SCART2
(J1101) and
peripheral circuits.
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)?
signal (VIN_2)
sent to input
terminal pin (4) of
IC2702 (SW)?
Check
CONNECTOR
(SC2702/P1101),
SCART2 (J1101)
and peripheral
circuits.
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)?
(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.
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)?
(VIN2=Y2/C2) sent
to input terminal
pins (190) and
(178) of IC3002
(VCT)?
NO
Check
CONNECTOR
(SC2702/P1101),
SCART2 (J1101)
and peripheral
circuits.
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)?
signal
(CVBS2=VIN2)
sent to input
terminal pin (190)
of IC3002 (VCT)?
Check IC2702
(SW) and
peripheral circuits.
(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)?
(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.
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)?
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).
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)
Click on the first or last page to see other LC-32GD8EK (serv.man10) service manuals if exist.