Sharp LC-32LE600E (serv.man7) Service Manual ▷ View online
LC-32/40/46LE600E/RU/S
5 – 25
<When EXT5/6/7 (HDMI) is used for external input> No picture on the display (5)-3
No HDMI2 digital video output when the EXT7 external input is
used.
Checklist:
1) Is “INPUT SOURCE” button
on the remote control set up correctly?
••• set it as “EXT5”/”EXT6”/”EXT7” with the INPUT SOURCE button on
the remote control.
2) Is MENU-Picture-Backlight/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.
4) Attention: The terminal of IC3303 (VCT) cannot be actually checked by hiding oneself, and check it with another terminal of the same line,
please.
Is the HDMI Digital video signal sent to pin (1)-(9) of EXT7 termi-
nal (SC1503)? (HDMI2_D [0:2] _P/N)
NO
Check external connection, input setting, EXT7 terminal
(SC1503) and peripheral circuits.
(SC1503) and peripheral circuits.
YES
Is the HDMI Digital video signal sent to pin (3)-(8) of IC1508
(HDMI-receiver)? (HDMI2_D [0:2] _P/N)
(HDMI-receiver)? (HDMI2_D [0:2] _P/N)
NO
Check short circuit of EXT7 terminal (SC1503), and peripheral
circuits.
circuits.
YES
Is HDMI_SW_ Digital Video signal sent to pin (AF16) (AE16)-
(AF18) (AE18) of input terminal of IC3303 (VCT)?
(HDMI_SW_D [0:2] P/N)
(AF18) (AE18) of input terminal of IC3303 (VCT)?
(HDMI_SW_D [0:2] P/N)
NO
Check short circuit of IC1508 (HDMI_receiver), power source
and peripheral circuits.
and peripheral circuits.
YES
Is the LVDS video signal (LVDS0_D [0:4]
±) input to pins (40)-
(28) of LW Connector (P2601), and is CLK signal (TCLK
±) input
to pins (32)/(33)?
NO
Check whether there is short circuit between [A6:A11], [B6:B11]
pin of IC3303 (VCT) and (40)-(28) pin of LW Connector (P2601),
and peripheral circuits.
pin of IC3303 (VCT) and (40)-(28) pin of LW Connector (P2601),
and peripheral circuits.
YES
Is the I2C signal (VCOM_SDA/SCL) send to pin(12)/(13) of LP
Connector (P2602)?
Connector (P2602)?
NO
Check the I2C signal of IC2602 and peripheral circuit.
YES
Is the PNL12V output to pin (1)/(2) of PL Connector (CN7004(32
inch)/CN7503(40/46 inch)) of POWER UNIT?
inch)/CN7503(40/46 inch)) of POWER UNIT?
NO
Check PL connector of POWER UNIT and U7053(32inch)/
IC7502(40/46inch).
IC7502(40/46inch).
YES
Exchange LCD-CONT-UNIT and do it operate normally?
NO
Check the contact of the LCD-CONT-UNIT connection harness
(LW/LP/PL).
Exchange LCD-PANEL if it is useless even if it exchanges it.
(LW/LP/PL).
Exchange LCD-PANEL if it is useless even if it exchanges it.
LC-32/40/46LE600E/RU/S
5 – 26
<When an external monitor is connected> No picture on the external monitor (6)-1
No picture appears on external monitor during the tuner (U/V)
reception. (Tuner input, EXT1 output)
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. set to EXT***.
2) Is SCART-CABLE disconnected or connected improperly?
••• Connect it correctly as per the operation manual.
Is the video signal outputted to pin (19) of SCART1 (SC503)?
YES
Check SCART1, external connection or input setting.
NO
Is the video signal (SC1-VOUT) outputted from pin (2) of IC504
(75
(75
Ω_driver)?
YES
Check SCART1 (SC503) and peripheral circuits.
NO
Is video signal (CVBS_TU_OUT) input to pin (4) of IC507?
YES
Check IC507 and peripheral circuits.
NO
Is video signal (TUNER_CVBS) outputted from emitter of
Q1102?
Q1102?
YES
Check IC3303 and peripheral circuits.
NO
Is video signal (VIDEO) outputted from pin (6) of TUNER
(TU1102)?
(TU1102)?
NO
Check IF5V power supply pins (3), 12C-line pins (9) and (8) of
tuner (TU1102) and peripheral circuits.
tuner (TU1102) and peripheral circuits.
LC-32/40/46LE600E/RU/S
5 – 27
<When an external monitor is connected> No picture on the external monitor (6)-2
No picture appears on external monitor during the EXT8 input
(COMPOSITE).
(EXT8 COMP input, EXT2 output)
Checklist:
1) Are input terminal on back of TV and “INPUT SOURCE” button
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. set to EXT***.
2) Is SCART-CABLE disconnected or connected improperly?
••• Connect it correctly as per the operation manual.
Is the video signal outputted to pin (19) of SCART2 (SC502)?
YES
Check SCART2, external connection or input setting.
NO
Is the video signal (SC2-VOUT) outputted from pin (4) of IC508
(75
(75
Ω_driver)?
YES
Check IC508 and peripheral circuits.
NO
Is the Composite Video signal (CVBS_MON_OUT) outputted
from the pin (B13) of IC3303 (VCT)?
from the pin (B13) of IC3303 (VCT)?
YES
Check between IC508 and IC3303 and the peripheral circuitry.
NO
Is the Composite signal (CVBS_IN) inputted to pins (6) of EXT8
terminal normally?
terminal normally?
YES
Check a short circuit etc. between the EXT8 input terminal (pin
(6)) and IC3303 (VCT).
(6)) and IC3303 (VCT).
NO
Check whether the terminal of EXT8 is faulty, or there is not any
error in external connection.
error in external connection.
LC-32/40/46LE600E/RU/S
5 – 28
<When an external monitor is connected> No picture on the external monitor (6)-3
No picture appears on external monitor during the EXT5/6/7
inputs (HDMI). (EXT5 HDMI input, EXT2 output)
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. set to EXT***.
2) Is SCART-CABLE disconnected or connected improperly?
••• Connect it correctly as per the operation manual.
Is the video signal outputted to pin (19) of SCART2 (SC502)?
YES
Check SCART2, external connection or input setting.
NO
Is the video signal (SC2-VOUT) outputted from pin (4) of IC508
(75
(75
Ω_driver)?
YES
Check IC508 and peripheral circuits.
NO
Is the Composite Video signal (CVBS_MON_OUT) outputted
from the pin (B13) of IC3303 (VCT)?
from the pin (B13) of IC3303 (VCT)?
YES
Check between IC508 and IC3303 and the peripheral circuitry.
NO
Is the HDMI output signal (HDMI_SW_D [0:2] P/N) input to the
pin [AF16-AE18] of IC3303 (VCT) normally?
pin [AF16-AE18] of IC3303 (VCT) normally?
YES
Check a short circuit, HDMI_H/V signal, HDMI_PLG signal, and
other abnormality, etc. with IC3303.
other abnormality, etc. with IC3303.
NO
Is the HDMI input signal (HDMI0/1/2_D [0:2] P/N) input to IC1508
(HDMI-receiver) normally?
(HDMI-receiver) normally?
YES
Check a short circuit, HDMI_I2C signal, and other abnormality,
etc. with IC1508.
etc. with IC1508.
NO
Are the pin (43) (44)/(39) (40)/(33) (34) of I2C signal (HDMI [0:2]
_SDA/SCL) accessed normally?
_SDA/SCL) accessed normally?
NO
Exchange HDMI-Receiver (IC1508) Or check short circuit.
YES
Is the TMDS signal (1-12) pin inputted to HDMI1/2/3 (EXT5/6/7)
terminal normally?
terminal normally?
YES
Check a short circuit etc. between HDMI1/2/3 and IC1508
(HDMI-receiver).
(HDMI-receiver).
NO
Check whether the terminal of HDMI1/2/3 (EXT5/6/7) is faulty, or
there is not any error in external connection.
there is not any error in external connection.
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