Sharp LC-32SH7E Service Manual ▷ View online
2008-03-14
LC-19S7E-BK LC-26S7E-BK LC-32S7E-BK
33
No picture on the display (1)
↓
The picture doesn't appear in all modes.
MAIN UNIT:
↓
↓NO
YES
↓YES
PANEL_UNIT:
↓YES
↓YES
No picture on the display (2)
↓
Does not the picture come out when VHF/UHF is received?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓YES
↓YES
Is LCD controller's control signal normal?
Is the above-mentioned LVDS signals output to connector
NO
Check the line between IC U4201 and CN7502.
NO
Control signals BRIGHT_ADJ, INVERTER_ON_OFF,
PANEL_PWR, and it peels off and whether normality is checked.
PANEL_PWR, and it peels off and whether normality is checked.
Check the panel module.
Similarly, is the LVDS signal input to connector of the panel
module?
module?
NO
FFC cable is checked.
Is LVDS signal output from 1st_channel and 2nd_channel of IC U4201 in each mode?
(RXO0+/RXO0-),( RXO1+/RXO1-),( RXO2+/RXO2-),( RXO3+/RXO3-),( RXOC+/RXOC-)
(RXO0+/RXO0-),( RXO1+/RXO1-),( RXO2+/RXO2-),( RXO3+/RXO3-),( RXOC+/RXOC-)
Check IC U4201 and its peripheral control circuits.
Is picture signal input from pin (16) of TUNER (TU1101) to pin
35(CVBS0) of IC U4201?
35(CVBS0) of IC U4201?
Is TUNER_CVBS signal output from pin (16) of TUNER (TU1101)?
NO
Check whether I2C is normally accessed between TU201 and IC
U400.
U400.
NO
Check the line between IC U4201and TU1101.
Refer to “The picture doesn't appear in all modes.”
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<External input SCART1>No picture on the display (3)
↓
Does not the picture of the CVBS signal input to SCART1 go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓YES
↓YES
<External input SCART1>No picture on the display (4)
↓
Does not the picture of the R/G/B video signal input to SCART1 go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓YES
↓YES
<External input AV3(Composite)>No picture on the display (5)
↓
Does not the picture of the composite video signal input to SIDE AV(Composite) go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓YES
↓YES
Is CVBS signal sent to pin (20) of SCART1 (CN1901)?
NO
Check the setting of an external input device that connects of
CN1901.
CN1901.
Refer to “The picture doesn't appear in all modes.”
Is CVBS signal sent to pin (31) of IC U4201?
NO
Check the line between IC U4201 and CN1901.
Is RGB signal sent to pin (15)/SCR, (11)/SCG, (7)/SCB, of SCART1
(CN1901)?
(CN1901)?
NO
Check the setting of an external input device that connects of
CN1901.
CN1901.
Refer to “The picture doesn't appear in all modes.”
Is RGB signal sent to pin (17)/RIN0, (15)/GIN0, (13)/BIN0 of IC
U4201?
U4201?
NO
Check the line between IC U4201 and CN1901.
Is CVBS signal sent to pin (2) of SIDE AV (CN1207) ?
NO
Check the setting of an external input device that connects of
CN1207.
CN1207.
Refer to “The picture doesn't appear in all modes.”
Is CVBS signal sent to pin (33) of IC U4201?
NO
Check the line between IC U4201 and CN1207.
2008-03-14
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<External input HDMI1>No picture on the display (6)
↓
Does not the picture of the HDMI signal input to HDMI1 go out?
MINI AV_UNIT:
↓
↓
YES
↓NO
YES
↓YES
↓YES
<External input VGA>No picture on the display (9)
↓
Does not the picture of the PC IN(ANALOG) video signal input to VGA(15pin-D-SUB terminal) go out?
TERMINAL_UNIT:
↓
MAIN_UNIT:
↓YES
↓YES
<External input AV1(Component)>No picture on the display (10)
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN1501) normal?
(CN1501) normal?
NO
Check the line between pin 50 of IC U1503 and CN1501.
Refer to “The picture doesn't appear in all modes.”
Check the connection and setup with the external HDMI devices.
Are EDID data pin (6)(SCL) of IC U1501 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), pin (16) of a HDMI
terminal(CN1501)?
accessed, and is it read from pin (15), pin (16) of a HDMI
terminal(CN1501)?
NO
Is access possible in the re-writing or exchange of EDID data of
IC U1501?
IC U1501?
Check CN1501, IC U1501 and peripheral circuits.
Is TMDS signal input into pin(RX_B2+, RX_B2-)/D2±_2,(RX_B1+,
RX_B1-)/D1±_2, (RX_B0+, RX_B0-)/D0±_2, (RX_BC+, RX_BC-
)/CLK± 2 of IC U1503?
RX_B1-)/D1±_2, (RX_B0+, RX_B0-)/D0±_2, (RX_BC+, RX_BC-
)/CLK± 2 of IC U1503?
Check the line between IC U1503 and CN1501.
NO
Is R/G/B/H/V signal sent to pin (1)/R, (2)/G, (3)/B, (14)/H, (13)/V of
VGA (CN1401)?
VGA (CN1401)?
NO
Check the setting of an external input device that connects of
CN1401.
CN1401.
Refer to “The picture doesn't appear in all modes.”
Is R/G/B/H/V signal sent to pin (11)/RIN1, (10)/GIN1, (8)/BIN1,
(3)/HSYNC1, (4)/VSYNC1 of IC U4201?
(3)/HSYNC1, (4)/VSYNC1 of IC U4201?
NO
Check the line between IC U4201 and CN1401.
Is TMDS signal input into pin(RX_BC2N, RX_BC2P)/D2±
_2,(RX_B1N, RX_B1P)/D1±_2, (RX_B0N, RX_B0P)/D0±_2,
(RX_BCKN, RX_BCKP)/CLK±_2 of IC U4201?
_2,(RX_B1N, RX_B1P)/D1±_2, (RX_B0N, RX_B0P)/D0±_2,
(RX_BCKN, RX_BCKP)/CLK±_2 of IC U4201?
Check the line between IC U1503 and IC U4201.
NO
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↓
Does not the picture of the component video signal input to Component go out?
TERMINAL_UNIT:
↓
MAIN_UNIT:
↓YES
↓YES
< During external connection > No picture on the monitor (1)
↓
No picture appears on SCART1 - connected monitor during the tuner (U/V) reception.
↓
TERMINAL_UNIT:
↓
↓NO
↓NO
< During external connection > No picture on the monitor (2)
AVOUT:
↓
No picture from SCART1 appears on AVOUT-connected monitor.
NOTE: Normally, if the screen during display is sent to SCART1, no picture is sent to AVOUT.
NOTE: Normally, if the screen during display is sent to SCART1, no picture is sent to AVOUT.
↓
TERMINAL_UNIT:
↓
↓NO
↓NO
Is Component Y/Pb/Pr signal sent to pin (2)/Y, (4)/Pb, (6)/Pr of
AV1(CN1201) ?
AV1(CN1201) ?
NO
Check the setting of an external input device that connects of
CN1201.
CN1201.
Refer to “The picture doesn't appear in all modes.”
Is Component Y/Pb/Pr signal sent to pin (25)/GIN2, (23)/BIN2,
(26)/RIN2 of IC U4201?
(26)/RIN2 of IC U4201?
NO
Check the line between IC U4201 and CN1201.
Is CVBS signal output into pin (19) of CN1901 (SCART1)?
YES
Check the setting of an external input device that connects of
CN1901.
CN1901.
Refer to “The picture doesn't appear in all modes.”
Is TUNER_CVBS signal output into pin (21) of CN1901 (SCART1)?
YES
Check the line between CN1901 and U4201
PIN(38)/CVBSOUT2.
PIN(38)/CVBSOUT2.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”
2) Is ANT-CABLE disconnected or connected improperly? …Connect it correctly as per the operation manual.
3) The picture is sent to the monitor in a CVBS signal if the source during display is ATV, CVBS of SCART1, SIDE AV.
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”
2) Is ANT-CABLE disconnected or connected improperly? …Connect it correctly as per the operation manual.
3) The picture is sent to the monitor in a CVBS signal if the source during display is ATV, CVBS of SCART1, SIDE AV.
When sent by component, etc., that signal is not sent to the monitor.
4) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
5) The video output from SCART1 is not the monitor output (output of the picture now watching).
5) The video output from SCART1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to SCART1. (Specification)
Is CVBS signal output into pin (2) of CN1205?
YES
Check the setting of an external input device that connects of
CN1205.
CN1205.
Refer to “The picture doesn't appear in all modes.”
Is CVBS signal output from pin (39) of IC U4201 into pin (2) of
CN1205 ?
CN1205 ?
YES
Check the line between CN1205 and IC U4201.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS of SCART1, SIDE AV.
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS of SCART1, SIDE AV.
When sent by component, etc., that signal is not sent to the monitor.
3) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
4) The video output from SCART1 is not the monitor output (output of the picture now watching).
4) The video output from SCART1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to SCART1. (Specification)
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