Sharp LC-32GA9EK (serv.man8) Service Manual ▷ View online
40
LC-26GA5E
LC-32GA5E
LC-32GA9E/LC-32BV9E
LC-37GA9E/LC-37BV9E
Troubleshooting Table (continued)
36
LC-32/37GA9E
LC-32/37BV9E
TROUBLESHOOTING TABLE
(Continued)
NO
NO
NO
YES
YES
Is composite video signal sent to
pin (1) of A/V-IN-TERMINAL
(J1201)?
pin (1) of A/V-IN-TERMINAL
(J1201)?
Check external connection,
input setting, A/V-IN-TERMINAL
(J1201) and peripheral circuits.
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)?
CVBS) sent to input terminal pin
(4) of IC1201 (SW)?
Check A/V-IN-TERMINAL
(J1201) and peripheral circuits.
(J1201) and peripheral circuits.
Is composite video signal
(CVBS=VIN7) sent to input
terminal pin (184) of IC3002
(VCT)?
(CVBS=VIN7) sent to input
terminal pin (184) of IC3002
(VCT)?
Check CONNECTOR
(SC2703/P1102), IC3002 (VCT)
and peripheral circuits.
(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)?
and (7) of S-TERMINAL
(J1201)?
Check external connection,
input setting, S-TERMINAL
(J1201) and peripheral circuits.
input setting, S-TERMINAL
(J1201) and peripheral circuits.
YES
YES
Is Y3 signal (IN3-Y) sent to input
terminal pin (6) of IC1201 (SW)?
terminal pin (6) of IC1201 (SW)?
Is Y/C signal (VIN7/VIN8) sent to
input terminal pins (184) and
(183) of IC3002 (VCT)?
input terminal pins (184) and
(183) of IC3002 (VCT)?
Check S-TERMINAL (J1201)
and peripheral circuits.
and peripheral circuits.
NO
Check CONNECTOR
(SC2703/P1102), IC3002 (VCT)
and peripheral circuits.
(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)?
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
1.8V power line of IC3002
(VCTP), and peripheral circuits.
(133) of BU3.3V power line and
pins (185), (169) and (142) of
1.8V 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)?
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
NO
Check CONNECTOR (P2305,
CN1) and Harness Wire (LV).
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).
– (28) of CONNECTOR
(P2305)?
Check Harness Wire (LV).
YES
Replace LCD-CONT-UNIT.
<When EXT3 is used for external input>
No EXT3 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 "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.
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.
external input system.
No picture on the display (5)
41
LC-26GA5E
LC-32GA5E
LC-32GA9E/LC-32BV9E
LC-37GA9E/LC-37BV9E
Troubleshooting Table (continued)
37
LC-32/37GA9E
LC-32/37BV9E
TROUBLESHOOTING TABLE
(Continued)
NO
NO
NO
YES
YES
Is "EXT4" selected with
button on the remote control?
button on the remote control?
Select "EXT4" with button
on the remote control.
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)?
(PCV_R/G/B) sent to pins (1),
(2) and (3) of EXT4-TERMINAL
(SC2303)?
Check D-SUB-adaptor and
external connection.
external connection.
Is D-SUB-COMPONENT signal
(PCV_R/G/B=VIN19/20/21))
sent to pins (174), (173) and
(172) of IC3002 (VCT)?
(PCV_R/G/B=VIN19/20/21))
sent to pins (174), (173) and
(172) of IC3002 (VCT)?
Check EXT4-TERMINAL and
peripheral circuits.
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)?
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
1.8V power line of IC3002
(VCTP), and peripheral circuits.
(133) of BU3.3V power line and
pins (185), (169) and (142) of
1.8V 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)?
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
NO
Check CONNECTOR (P2305,
CN1) and Hareness Wire (LV).
CN1) and Hareness 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 Hareness Wire (LV).
– (28) of CONNECTOR
(P2305)?
Check Hareness Wire (LV).
YES
Replace LCD-CONT-UNIT.
<When EXT4 is used for external input>
No EXT4 (15pin-D-SUB-terminal)
output of the external input system.
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.
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)
42
LC-26GA5E
LC-32GA5E
LC-32GA9E/LC-32BV9E
LC-37GA9E/LC-37BV9E
Troubleshooting Table (continued)
38
LC-32/37GA9E
LC-32/37BV9E
TROUBLESHOOTING TABLE
(Continued)
NO
NO
NO
YES
YES
Is "EXT5" selected with
button on the remote control?
button on the remote control?
Select "EXT5" with button
on the remote control.
on the remote control.
YES
Is the type of video signal
(Signal Type) from HDMI-
connected external device set?
(Signal Type) from HDMI-
connected external device set?
From MENU-Option-HDMI
Setup-Signal Type, select a
signal type ("RGB", "YCbCr
4:4:4" or "YCbCr 4:2:2").
Setup-Signal Type, select a
signal type ("RGB", "YCbCr
4:4:4" or "YCbCr 4:2:2").
Is the type of colour signal
(Colour Matrix) from HDMI-
connected external device set?
(Colour Matrix) from HDMI-
connected external device set?
From Option-HDMI Setup-
Colour Matrix, select a color
signal type ("AUTO", "ITU601"
or "ITU709").
Colour Matrix, select a color
signal type ("AUTO", "ITU601"
or "ITU709").
NO
NO
YES
YES
Is digital signal (RX
`± signal)
sent to pins (110) – (114) of
EXT5 (HDMI) terminal
(SC1901)?
EXT5 (HDMI) terminal
(SC1901)?
Is I2C signal (SDA/SCL signal)
sent to pins (16) and (15) of
EXT5 (HDMI) terminal? Check
external connection and
peripheral circuits.
sent to pins (16) and (15) of
EXT5 (HDMI) terminal? Check
external connection and
peripheral circuits.
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (110) – (144)
of IC1905 (HDMI-RECEIVER)?
R/G/B) sent to pins (110) – (144)
of IC1905 (HDMI-RECEIVER)?
Check power supply
(5/3.3/1.8V) of IC1905,
SDA/SCL signal pins (29) and
(30), and peripheral circuits.
(5/3.3/1.8V) of IC1905,
SDA/SCL signal pins (29) and
(30), and peripheral circuits.
NO
YES
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (73) – (50) of
IC3002 (VCT)?
R/G/B) sent to pins (73) – (50) of
IC3002 (VCT)?
Check SDA3/SCL3 signal pins
(27) and (28), interface between
IC1905 and IC3002, and
peripheral circuits.
(27) and (28), interface between
IC1905 and IC3002, 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)?
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
1.8V power line of IC3002
(VCTP), and peripheral circuits.
(133) of BU3.3V power line and
pins (185), (169) and (142) of
1.8V 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)?
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
NO
Check CONNECTOR (P2305,
CN1) and Hareness Wire (LV).
CN1) and Hareness 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 Hareness Wire (LV).
– (28) of CONNECTOR
(P2305)?
Check Hareness Wire (LV).
YES
Replace LCD-CONT-UNIT.
<When EXT5 is used for external input>
No EXT5 (HDMI) output of the
external input system.
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 "EXT5".
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or
"YCbCr 4:2:2").
3) Have you checked the type of Colour Matrix sent from HDMI-connected external device? ··· Confirm the type (it should be “ITU601’ or “ITU709”.)
4) 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 "EXT5".
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or
"YCbCr 4:2:2").
3) Have you checked the type of Colour Matrix sent from HDMI-connected external device? ··· Confirm the type (it should be “ITU601’ or “ITU709”.)
4) Is ANT-CABLE disconnected or connected improperly? ··· Connect it correctly as per the operation manual.
No picture on the display (7)
43
LC-26GA5E
LC-32GA5E
LC-32GA9E/LC-32BV9E
LC-37GA9E/LC-37BV9E
39
LC-32/37GA9E
LC-32/37BV9E
TROUBLESHOOTING TABLE
(Continued)
NO
NO
NO
YES
YES
Is "EXT6" selected with
button on the remote control?
button on the remote control?
Select "EXT6" with button
on the remote control.
on the remote control.
YES
Is the type of video signal
(Signal Type) from HDMI-
connected external device set?
(Signal Type) from HDMI-
connected external device set?
From MENU-Option-HDMI
Setup-Signal Type, select a
signal type ("RGB", "YCbCr
4:4:4" or "YCbCr 4:2:2").
Setup-Signal Type, select a
signal type ("RGB", "YCbCr
4:4:4" or "YCbCr 4:2:2").
Is the type of colour signal
(Colour Matrix) from HDMI-
connected external device set?
(Colour Matrix) from HDMI-
connected external device set?
From Option-HDMI Setup-
Colour Matrix, select a color
signal type ("AUTO", "ITU601"
or "ITU709").
Colour Matrix, select a color
signal type ("AUTO", "ITU601"
or "ITU709").
NO
NO
YES
YES
Is digital signal (RX
`± signal)
sent to pins (1) – (12) of EXT6
(HDMI) terminal (SC1902)?
(HDMI) terminal (SC1902)?
Is I2C signal (SDA/SCL signal)
sent to pins (16) and (15) of
EXT6 (HDMI) terminal? Check
external connection and
peripheral circuits.
sent to pins (16) and (15) of
EXT6 (HDMI) terminal? Check
external connection and
peripheral circuits.
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (110) – (144)
of IC1905 (HDMI-RECEIVER)?
R/G/B) sent to pins (110) – (144)
of IC1905 (HDMI-RECEIVER)?
Check power supply (3.3/1.8V)
of IC1905, SDA/SCL signal pins
(99) and (74), and peripheral
circuits.
of IC1905, SDA/SCL signal pins
(99) and (74), and peripheral
circuits.
NO
YES
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (73) – (50) of
IC3002 (VCT)?
R/G/B) sent to pins (73) – (50) of
IC3002 (VCT)?
Check SDA3/SCL3 signal pins
(27) and (28), interface between
IC1905 and IC3002, and
peripheral circuits.
(27) and (28), interface between
IC1905 and IC3002, 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)?
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
1.8V power line of IC3002
(VCTP), and peripheral circuits.
(133) of BU3.3V power line and
pins (185), (169) and (142) of
1.8V 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)?
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
NO
Check CONNECTOR (P2305,
CN1) and Hareness Wire (LV).
CN1) and Hareness 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 Hareness Wire (LV).
– (28) of CONNECTOR
(P2305)?
Check Hareness Wire (LV).
YES
Replace LCD-CONT-UNIT.
<When EXT6 is used for external input>
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT5".
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or
"YCbCr 4:2:2").
3) Have you checked the type of Colour Matrix sent from HDMI-connected external device? ··· Confirm the type (it should be “ITU601’ or “ITU709”.)
4) 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 "EXT5".
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or
"YCbCr 4:2:2").
3) Have you checked the type of Colour Matrix sent from HDMI-connected external device? ··· Confirm the type (it should be “ITU601’ or “ITU709”.)
4) Is ANT-CABLE disconnected or connected improperly? ··· Connect it correctly as per the operation manual.
No picture on the display (8)
Troubleshooting Table (continued)
