Sharp LC-46D92U Service Manual page 57

No external input video [INPUT-6]
Is INPUT-6 selected on the input select menu screen?
YES
Select INPUT-6 on the input select menu screen for the
right input signal.
Does the HOT PLUG detection function?
Does the HDMI_HPG2 signal come from pin (18) of con-
nector (SC1502) to pin (61) of IC9101 (CPLD)?
Check the line between SC1502 and IC9101
YES
(CPLD) (Q1505, Q1507, 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 IC1507/
YES
IC1510.
Does the HDP2 signal come from pin (62) of IC1507 to pin
(19) of SC1502?
Check the line between IC1507 and SC1502.
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?
YES
Is IC1502 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
<HDMI/DVI signal input>
Is INPUT-7 selected on the input select menu screen?
NO
NO
NO
NO
NO
Does the signal come from connector (SC1503) to the input pins (5
and 6) (CLK±), (8 and 9) (D0±), (11 and 12) (D1±), and (14 and 15)
(D2±), all of IC1507?
NO
NO
4 – 9
No video (4)
No external input video [INPUT-7]
YES
Select INPUT-7 on the input select menu screen for the
right input signal.
Does the HOT PLUG detection function?
Does the HDMI_HPG1 signal come from pin (14) of con-
nector (SC1503) to pin (58) of IC9101 (CPLD)?
Check the line between SC1503 and
YES
IC9101 (CPLD) (Q1501, Q1502, 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 HDP1 signal come from pin (44) of IC1507 to
pin (19) of SC1503?
Check the line between IC1507 and
SC1503.
YES
Is IC1503 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
LC-46D92U/LC-52D92U
NO
NO
NO
NO
NO
NO
NO