Sharp Aquos LC-80LE642U, Service Manual

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LC-80LE642U
6 – 10
<HDMI input> No video (1)-4
HDMI: No external input video [INPUT-4]
Is INPUT-4 selected on the input select menu screen? NO Select INPUT-4 on the input select menu screen for
the right input signal.
YES
Does the HOT PLUG detection function?
NO
Check the line between the pin(18) of SC1504 and the
pin(51) of IC2601.
Does the DDC5V signal come from pin (18) of SC1504 to pin (51) of IC2601
(HDMI_SW)?
YES
Does the HPD signal come from pin (50) of IC2601 to pin (19) of SC1504? NO Check the line between the pin (50) of IC2601 and the
pin (19) of SC1504.
YES
Is IC2601(HDMI-SW) accessed by I2C, with HDMI connected, to read the DDC-
I2C SCL/SDA data?
NO
Check the DDC-I2C line and its peripheral circuits.
SC1501 pin(15)(SCL), pin(16)(SDA)
IC2601 pin(49), pin(48)
YES
Are there the TMDS signal at input pins of IC3301(CPU)?
NO
Check the TMDS line (between SC1504 and IC2601)
and its peripheral circuits.
[IC2601 TMDS input pins]
pin(99/100)(CLK-/+), pin(1/2)(D0-/+), pin(3/4)(D1-/+),
pin(5/6)(D2-/+).
YES
Check the TMDS line (between IC2601 and IC3301)
and its peripheral circuits.
[IC3301 TMDS input pins]
pin(AH35/AH34)(CLK-/+), pin(AG35/AG34)(D0-/+),
pin(AG37/AG36)(D1-/+), pin(AF35/AF34)(D2-/+).
Check the I2C line (between IC2601 and IC3301).
IC2601:pin(71)(SCL), pin(70)(SDA)
IC3301:pin(AN12), pin(AP12)
Check IC2601 and its peripheral circuits.
Is the T-CON PWB connected?
VBO_LOCKN (40pin) of SC3801 become Low if there is no problem in the con-
nection. NO Check the T-CON PWB and harness.
Check IC3301 and SC3801 and their peripheral cir-
cuits in Main PWB.
YES
Are the V-By-One signal input to the pin of SC3801?
VBO/- (36/37pin), VBO/- (32/33pin),
VBO/- (28/29pin), VBO/- (24/25pin). NO Check IC3303 and its peripheral circuits.
(IC3501/IC3502/IC3503/IC3504, etc.)
YES
Check the panel module and harness.