Sharp LC-50U35T Service Manual page 28

LC50/58/65U35T
HDMI:No external input video [HDMI2]
Is HDMI2 selected on the input select menu screen?
D o e s h t e H O T P L U G d e e t
Does the DDC5V signal come from pin(18) of SC1502 to pin(97)
of IC2502(HDMI-SW)?
Does the HPD signal come from pin(127) of IC2502 to pin(19) of
SC1501?
Is IC2502(HDMI-SW) accessed by I2C, with HDMI connected, to
read the DDC-I2C SCL/SDA data?
Does the HPD signal come from pin(F31/F30) of IC3303 to
pin(110/113) of IC2502?
Are there the TMDS signals at input pins of IC3301(CPU)?
Is the T-CON PWB connected?
V_LOCKN pin(26) of SC3802 become Low if there is no problem
in the connection.
Are the V-By-One HS signal input to the pin of SC3802?
V_VBO_TX_1+/-(23/24pin), V_VBO_TX_2+/-(20/21pin),
V_VBO_TX_3+/-(17/18pin),
V_VBO_TX_4+/-(14/15pin), V_VBO_TX_5+/-(11/12pin),
V_VBO_TX_6+/-(8/9pin), etc
Check the panel module and harness.
YES
t c o i n u f n t c o i n ?
YES
YES
YES
YES
YES
YES
YES
No video (1)-2
NO Select HDMI2 on the input select menu screen for the right input
signal.
N O C h e k c h t e n i l e b e w t
IC2502.
NO Check the line between the pin(19) of SC1502 and the pin(127) of
IC2502.
Check the DDC-I2C line and its peripheral circuits..
NO
SC1502 pin(15)(SCL), pin(16)(SDA)
IC2502 pin(96)(SCL), pin(95)(SDA)
NO Check the line between the pin(F31/F30) of IC3303 and the
pin(110/113) of IC2502.
Check the TMDS line (between SC1502 and IC2502) and its
peripheral circuits.
NO
[IC2502 TMDS input pins]
pin(130/131)(CLK-/+), pin(134/135)(D0-/+),
pin(136/137)(D1-/+), pin(138/139)(D2-/+).
Check the TMDS line (between IC2502 and IC3303) and its
peripheral circuits.
[IC3303 TMDS input pins]
pin(B24/A24)(TMDS0_CLK-/+), pin(D23/C23)(TMDS0_D0-/+),
pin(D22/C22)(TMDS0_D1-/+), pin(B22/A22)(TMDS0_D2-/+).
pin(B21/A21)(TMDS1_CLK-/+), pin(B20/A20)(TMDS1_D0-/+),
pin(B19/A19)(TMDS1_D1-/+), pin(B18/A18)(TMDS1_D2-/+).
Check SC1502, IC2502, IC3303 and its peripheral circuits.
Check the T-CON PWB and harness.
NO
Check IC3303 and SC3802 and their peripheral circuits in Main
PWB.
Check IC3303 and its peripheral circuits.(IC3501/IC3502/IC3503,
etc.)
NO
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e e n h t e p n i 1 ( ) 8 f o S C 1 5 0 2 a n d h t e p n i 9 ( ) 7 f o