Sharp LC-26SB25E Service Manual ▷ View online
2008-03-14
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
49
<External input HDMI1>No picture on the display (9)
↓
Does not the picture of the HDMI signal input to HDMI1 go out?
MINI AV_UNIT:
↓
↓
YES
↓NO
YES
↓YES
<External input HDMI2>No picture on the display (10)
↓
Does not the picture of the HDMI signal input to HDMI2 go out?
MINI AV_UNIT:
↓
↓
YES
↓NO
YES
↓YES
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN702) normal?
(CN702) normal?
NO
Check the line between pin (AE1) of IC U400 and CN702.
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 U708 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), pin (16) of a HDMI
terminal(CN702)?
accessed, and is it read from pin (15), pin (16) of a HDMI
terminal(CN702)?
NO
Is access possible in the re-writing or exchange of EDID data of
IC U708?
IC U708?
Check CN702, IC U708 and peripheral circuits.
Is TMDS signal input into pin (AF7, AE7)/RX2±, (AF6, AE6)/RX1±,
(AF5, AE5)/RX0±, (AF4, AE4)/RXC± of IC U400?
(AF5, AE5)/RX0±, (AF4, AE4)/RXC± of IC U400?
Check the line between IC U400 and CN702.
NO
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN700) normal?
(CN700) normal?
NO
Check the line between pin (B20) of IC U400 and CN700.
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 U701 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), (16) of a HDMI
terminal(CN700)?
accessed, and is it read from pin (15), (16) of a HDMI
terminal(CN700)?
NO
Is access possible in the re-writing or exchange of EDID data of
IC U701?
IC U701?
Check CN700, IC U701 and peripheral circuits.
Is TMDS signal input into pin (AF11, AE11)/RX2±, (AF10,
AE10)/RX1±, (AF9, AE9)/RX0±, (AF8, AE8)/RXC± of IC U400?
AE10)/RX1±, (AF9, AE9)/RX0±, (AF8, AE8)/RXC± of IC U400?
Check the line between IC U400 and CN700.
NO
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
50
<External input HDMI3>No picture on the display (11)
↓
Does not the picture of the HDMI signal input to HDMI3 go out?
MINI AV_UNIT:
↓
↓
YES
↓NO
YES
↓YES
<External input VGA>No picture on the display (12)
↓
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 (13)
↓
Does not the picture of the component video signal input to Component go out?
TERMINAL_UNIT:
↓
MAIN_UNIT:
↓YES
↓YES
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN701) normal?
(CN701) normal?
NO
Check the line between pin (AA4) of IC U400 and CN701.
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 U700 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), (16) of a HDMI
terminal(CN701)?
accessed, and is it read from pin (15), (16) of a HDMI
terminal(CN701)?
NO
Is access possible in the re-writing or exchange of EDID data of
IC U700?
IC U700?
Check CN701, IC U700 and peripheral circuits.
Is TMDS signal input into pin (AF15, AE15)/RX2±, (AF14,
AE14)/RX1±, (AF13, AE13)/RX0±, (AF12, AE12)/RXC± of IC U400?
AE14)/RX1±, (AF13, AE13)/RX0±, (AF12, AE12)/RXC± of IC U400?
Check the line between IC U400 and CN701.
NO
Is R/G/B/H/V signal sent to pin (1)/R, (2)/G, (3)/B, (14)/H, (13)/V of
VGA (CN554)?
VGA (CN554)?
NO
Check the setting of an external input device that connects of
CN554.
CN554.
Refer to “The picture doesn't appear in all modes.”
Is R/G/B/H/V signal sent to pin (AE18)/R, (AE17)/G, (AF16)/B,
(AC16)/H, (AB17)/V of IC U400?
(AC16)/H, (AB17)/V of IC U400?
NO
Check the line between IC U400 and CN554.
Is Component Y/Pb/Pr signal sent to pin (2)/Y, (4)/Pb, (6)/Pr of
AV1(CN552) ?
AV1(CN552) ?
NO
Check the setting of an external input device that connects of
CN552.
CN552.
Refer to “The picture doesn't appear in all modes.”
Is Component Y/Pb/Pr signal sent to pin (AF19)/Y, (AF20)/Pb,
(AD20)/Pr of IC U400?
(AD20)/Pr of IC U400?
NO
Check the line between IC U400 and CN552.
2008-03-14
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
51
< 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
Is CVBS signal output into pin (19) of CN500 (SCART1)?
YES
Check the setting of an external input device that connects of
CN500.
CN500.
Refer to “The picture doesn't appear in all modes.”
Is TUNER_CVBS signal output into pin (21) of CN500 (SCART1)?
YES
Check the line between CN500 and TU200.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”, “Y/C”, “RGB”, “AUTO”.
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 or Y/C of SCART1-2, AV3.
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”, “Y/C”, “RGB”, “AUTO”.
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 or Y/C of SCART1-2, AV3.
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)
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
52
< During external connection > No picture on the monitor (2)
SCART2:
↓
No picture from SCART1 appears on SCART2-connected monitor.
NOTE: Normally, if the screen during display is sent to SCART2, no picture is sent to SCART2.
↓
TERMINAL_UNIT:
↓
↓NO
↓NO
Is CVBS signal output into pin (19) of CN501 (SCART2)?
YES
Check the setting of an external input device that connects of
CN501.
CN501.
Refer to “The picture doesn't appear in all modes.”
Is CVBS signal output from pin (Y22) of IC U400 into pin (19) of
CN501 (SCART2)?
CN501 (SCART2)?
YES
Check the line between CN501 and IC U400.
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”, “Y/C”, “AUTO”.
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of SCART1-2, AV3.
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? …Set it to “CVBS”, “Y/C”, “AUTO”.
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of SCART1-2, AV3.
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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