Sharp LC-37GP1U Service Manual page 36

LC-32GP1U/LC-37GP1U 1st
No external input video [INPUT-4]
Is INPUT-4 selected on the input select menu screen?
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 (SC801) to pin (67) of IC9101 (CPLD)?
Check the line between SC801 and IC9101
(CPLD) (Q1704, Q1706, etc.).
YES
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/
IC1510.
YES
Does the HDP2 signal come from pin (62) of IC1702 to
pin (19) of SC1701?
YES
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?
Is IC1701 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
Check the DDC line and its peripheral circuits (IC1701
(EEPROM) and its peripherals).
YES
Does the signal come from pins (34 and 35) (CLK±), (31 and 32)
(D0±), (28 and 29) (D1±), and (25 and 26) (D2±) of IC1702 to pins (39
and 40), (43 and 44), (47 and 48), and (51 and 52) of IC1510?
Check IC1702, IC1510 and their peripheral circuits.
YES
Are there the U3VINY [7:0], U3VINR [7:0], U3VINPBPR [7:0], U3VDIN, U3HDIN,
U3DEIN and U3VINCLK signal outputs from IC1510?
Are there the U3VINY [7:0], U3VINR [7:0], U3VINPBPR [7:0], U3VDIN, U3HDIN,
U3DEIN and U3VINCLK signal inputs at IC3301 (VPC)?
Is there the LVDS signal output at the LVDS 1st channel and 2nd channel of IC3301?
TA2_P/M (AJ30/AK30), TB2_P/M (AJ29/AK29), TC2_P/M (AJ28/AK28), TD2_P/M
(AJ26/AK26), TE2_P/M (AJ25/AK25), TCLK2_P/M (AJ27/AK27), TA1_P/M (AB29/
AB30), TB1_P/M (AC29/AC30), TC1_P/M (AD29/AD30), TD1_P/M (AF29/AF30),
TE1_P/M (AG29/AG30), TCLK1_P/M (AE29/AE30)
Check the panel module.
[HDMI/DVI signal input] No video (4)
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
6 – 4
No external input video [INPUT-5]
Is INPUT-5 selected on the input select menu screen?
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 IC9101
(CPLD) (Q1506, Q1508, etc.).
YES
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/
IC1510.
YES
Does the HDP3 signal come from pin (44) of IC1507 to pin
(19) of SC1501?
YES
Check the line between IC1507 and SC1501.
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?
Is IC1501 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
Check the DDC line and its peripheral circuits (IC1501
(EEPROM) and its peripherals).
YES
Does the signal come from pins (34 and 35) (CLK±), (31 and 32) (D0±),
(28 and 29) (D1±), and (25 and 26) (D2±) of IC1507 to pins (58 and 59),
(62 and 63), (66 and 67), and (70 and 71) of IC1510?
Check IC1507, IC1510 and their peripheral circuits.
YES
NO Check IC1510 and its peripheral circuits.
NO Check the line between IC1510 and IC3301.
NO Check IC3301 and its peripheral control circuits
(IC3501, IC3502, IC8101, etc.).
NO
NO
NO
NO
NO
NO
NO
NO