LC-40LU700E (serv.man9). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 14

LC-32/40/46LE700E/RU/S,LU700E/S,LX700E/RU,LC-52LE700E/RU/S

6 – 14

                                            

                                            

YES

Is the Hot plug detection function output from pin (19) of the 
HDMI-1(SC1502) normal?

NO

Check the line between SC1502 and pin(31) of IC1504(HDMI-
SW).

Is the Hot plug detection function output from pin (19) of the 
HDMI-2(SC1503) normal?

NO

Check the line between SC1503 and pin(35) of IC1504(HDMI-
SW).

Is the Hot plug detection function output from pin (19) of the 
HDMI-3(SC1506) normal?

NO

Check the line between SC1506 and pin(41) of IC1504(HDMI-
SW).

Is the Hot plug detection function output from pin (19) of the 
HDMI-4(SC1501) normal?

NO

Check the line between SC1501 and pin(41) of IC1504(HDMI-
SW).

YES

NO

Check the setting of an external input device that connects with 
HDMI-1/2/3/4.

Is EDID data pins(40/HDMI3_SCL), (39/HDMI3_SDA) of IC1504 
accessed, and is it read from pins(15, 16) of a HDMI-1(SC1502)?

NO

Is access possible in the exchange of IC1504?

Is EDID data pins(44/HDMI1_SCL), (43/HDMI1_SDA) of IC1504 
accessed, and is it read from pins(15, 16) of a HDMI-2(SC1503)?

NO

Is EDID data pins(30/HDMI1_SCL), (29/HDMI1_SDA) of IC1504 
accessed, and is it read from pins(15, 16) of a HDMI-3(SC1506)?

Check the peripheral circuit of SC1502/1503/1506/1501and 
IC1504.

Is EDID data pins(34/HDMI2_SCL), (33/HDMI2_SDA) of IC1504 
accessed, and is it read from pins(15, 16) of a HDMI-4(SC1501)?

YES

Is TMDS signal input into pins (12, 11/HDMI3_CLKP/N), (14, 13/
HDMI3_D0P/N), (16, 15/HDMI3_D1P/N), (18, 17/HDMI1_D2P/
N) of IC1504 from HDMI-1(SC1502)?

NO

Check the line between HDMI-1(SC1502) and IC1504.

Is TMDS signal input into pins (20, 19/HDMI2_CLKP/N), (22,21/
HDMI2_D0P/N), (24, 23/HDMI2_D1P/N), (26, 25/HDMI2_D2P/
N) of IC1504 from HDMI-1(SC1503)?

NO

Check the line between HDMI-2(SC1503) and IC1504.

Is TMDS signal input into pins (66, 65/HDMI1_CLKP/N), (68, 67/
HDMI1_D0P/N), (70, 69/HDMI1_D1P/N), (72, 71/HDMI1_D2P/
N) of IC1504 from HDMI-1(SC1506)?

NO

Check the line between HDMI-3(SC1506) and IC1504.

Is TMDS signal input into pins (2, 1/HDMI2_CLKP/N), (4, 3/
HDMI2_D0P/N), (6, 5/HDMI2_D1P/N), (8, 7/HDMI2_D2P/N) of 
IC1504 from HDMI-1(SC1503)?

NO

Check the line between HDMI-4(SC1501) and IC1504.

YES

Are TMDS_Rx and the I2C_SINK signal output from IC1504 
respectively?
Pins(62, 63/SW_TMDS_CLKP/N), (60, 61/SW_TMDS_D0P/N), 
(58, 59/SW_TMDS_D1P), (56, 57/SW_TMDS_D2P) 

NO

Check the IC1504 and peripheral circuits.

YES

Is the TMDS_Rx/ I2C_SINK signal input to IC3302 (Digital AV 
decode & Main CPU)?
Pins(AK6, AJ6/SW_TMDS_CLKP/N), (AK7, AJ7/
SW_TMDS_D0P/N), (AK8, AJ8/SW_TMDS_D1P), (AK9, AJ9/
SW_TMDS_D2P) from IC1504 

NO

Check the line between IC1504 and IC3302.

YES

Refer to “The picture doesn't appear in all modes.”
or “No sound output in all modes”