Sharp Aquos LC-42D72U, Service Manual

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LC-42D72U
4 – 7
<HDMI signal input> No video (4)
No external input video [INPUT-4] No external input video [INPUT-5]
Is INPUT-4 selected on the input select menu screen? Is INPUT-5 selected on the input select menu screen?
YES
NO
YES
NO
Select INPUT-4 on the input select menu screen for the
right input signal. Select INPUT-5 on the input select menu screen for the
right input signal.
NO NO
Does the HOT PLUG detection function? Does the HOT PLUG detection function?
Does the HDMI_HPG2 signal come from pin (18) of con-
nector (SC1502) to pin (68) of IC9101 (CPLD)? Does the HDMI_HPG3 signal come from pin (18) of con-
nector (SC1501) to pin (69) of IC9101 (CPLD)?
YES
NO
YES
NO
Check the line between SC1502 and IC9101
(CPLD) (Q1505, Q1507, etc.). Check the line between SC1501 and
IC9101 (CPLD) (Q1506, Q1508, etc.).
Does the HDMI_PLG_EN signal come from pin (77) of
IC9101 to pin (44) of IC1508 (HDMI/HDCP/DVI COMPLI-
ANT RECEIVER) and pin (40) of IC1507 (DVI/HDMI
SWITCH)? Does the HDMI_PLG_EN signal come from pin (77) of
IC9101 to pin (44) of IC1508 (HDMI/HDCP/DVI COMPLI-
ANT RECEIVER) and pin (40) of IC1507 (DVI/HDMI
SWITCH)?
YES
NO
YES
NO
Check the line between IC9101 and IC1507/
IC1508. Check the line between IC9101 and
IC1507/IC1508.
Does the HDP2 signal come from pin (62) of IC1507 to pin
(19) of SC1502? Does the HDP3 signal come from pin (44) of IC1507 to
pin (19) of SC1501?
NO NO
Check the line between IC1507 and SC1502. Check the line between IC1507 and
SC1501.
Does the signal come from connector (SC1502) to the input pins (67 and
68) (CLK
±
), (70 and 71) (D0
±
), (73 and 74) (D1
±
), and (76 and 77)
(D2
±
), all of IC1507?
Does the signal come from connector (SC1501) to the input pins (48
and 49) (CLK
±
), (51 and 52) (D0
±
), (54 and 55) (D1
±
), and (57 and 58)
(D2
±
), all of IC1507?
YES
NO
YES
NO
Is IC1502 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data? Is IC1501 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
NO NO