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LC-52XS1E/RU/LC-65XS1E/RU
[5] Video Troubleshooting
<At the time of AVC connection>
No picture appears on LCD at the time of AVC connection.
Checklist:
1) Is "INPUT SOURCE" button
SOURCE button
of the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"? • • • Set it to an appropriate level.
3) Is the level of pin (12) (13) of IC6004 (TMDS-SW) at "H"? • • • These are serial communications lines (I2C) for the control. If it is "L", check
whether something pulls it to "L".
4) IF-UNIT power supply input • • • Check whether BU5V is inputted into PD (P5801) 6/7pin, and UR15V is inputted into PE (P5802) 1/2pin.
5) LCD-CTL-UNIT power supply input • • • Check whether VCC (12V) is inputted into LC (P4802) 9/10pin.
(IF-UNIT)
IF-UNIT output part: Is the LVDS_ [TA1:TD1] ± signal outputted
to the pin (40-28) of LW connector (SC7901)? and Is the
LVDS_[TA2:TD2] ± signal outputted to the pin (26-14)?
Is the FPGA_R/G/B [0:9] signal inputted into the pin (76-112) of
IC7502 (LVDS_TX)?
It seems that abnormalities are between IC7103 (FPGA), IC6201
(DECODER), and a HDMI input. Please return in front.
(IF-UNIT)
Is the difference input signal (RX
[0:C] ±) inputted into [25-35] pin of
IC6004 (TMDS-SW) normally?
YES
Is the signal of IC6102 (HDMI_RX)
and IC6052 (LVDS_TX) outputted
normally?
YES
Is differential output signal, of IC6201
(DECODER) outputted normally?
YES
Check the power supply and solder-
ing of IC7103 (FPGA). Or replace.
YES
When you still do not understand,
replace IF-UNIT.
No picture on the display (1)-1
on the remote control set up correctly? • • • Set it as the external input of the favorite with the INPUT
YES
NO
NO
NO
Is IC6001 (E2PROM) accessed by
I2C, and is data read from (5) (6) pin?
Check whether there is any I2C
access in the EDID data re-writing of
IC6001 (E2PROM).
Check the peripheral circuit of HDMI
terminal (SC6001) and IC6004
(TMDS-SW).
YES
Check the LVDS output signal (71-56) pin of IC7502 (LVDS_TX),
a power supply (3.3V), and soldering.
NO
YES
NO
YES
4 – 8
Check the peripheral circuit of a
HDMI terminal (SC6001), and con-
nection of a HDMI terminal.
Check the I2C line of IC6003 (I2C-
SW) and IC7002 (MICON), and the
EDID_WP signal of IC6702 (CPLD).
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Table of Contents
Troubleshooting
