Sharp LC-52D82U Service Manual page 55

No external input video [INPUT-4]
Is INPUT-4 selected on the input select menu screen?
YES
Select INPUT-4 on the input select menu screen for the
right input signal.
Does the HOT PLUG detection function?
Does the HDMI_HPG5 signal come from pin (18) of con-
nector (SC1701) to pin (67) of IC9101 (CPLD)?
Check the line between SC1701 and IC9101
YES
(CPLD) (Q1704, Q1706, etc.).
Does the HDMI_PLG_ENA signal come from pin (82) of
IC9101 to pin (34) of IC1510 (HDMI/HDCP/DVI COMPLI-
ANT RECEIVER) and pin (40) of IC1702 (DVI/HDMI
SWITCH)?
Check the line between IC9101 and IC1702/
YES
IC1510.
Does the HDP2 signal come from pin (62) of IC1702 to pin
(19) of SC1701?
Check the line between IC1702 and SC1701.
Does the signal come from connector (SC1701) to the input pins (67 and
68) (CLK±), (70 and 71) (D0±), (73 and 74) (D1±), and (76 and 77)
(D2±), all of IC1702?
YES
Is IC1701 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
<HDMI/DVI signal input>
Is INPUT-5 selected on the input select menu screen?
NO
NO
NO
NO
NO
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?
NO
NO
4 – 7
No video (4)
No external input video [INPUT-5]
YES
Select INPUT-5 on the input select menu screen for the
right input signal.
Does the HOT PLUG detection function?
Does the HDMI_HPG3 signal come from pin (18) of con-
nector (SC1501) to pin (66) of IC9101 (CPLD)?
Check the line between SC1501 and
YES
IC9101 (CPLD) (Q1506, Q1508, etc.).
Does the HDMI_PLG_ENB signal come from pin (81) of
IC9101 to pin (33) of IC1510 (HDMI/HDCP/DVI COMPLI-
ANT RECEIVER) and pin (40) of IC1507 (DVI/HDMI
SWITCH)?
Check the line between IC9101 and
YES
IC1507/IC1510.
Does the HDP3 signal come from pin (44) of IC1507 to
pin (19) of SC1501?
Check the line between IC1507 and
SC1501.
YES
Is IC1501 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
LC-46D82U/LC-52D82U
NO
NO
NO
NO
NO
NO
NO