Sharp LC-37D90U Service Manual page 87

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
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).
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 (50 and 51), (54 and 55), (58 and 59), and
(62 and 63) of IC1508?
Are there the U3VINY[7:0], U3VINR[7:0], U3VINPBPR[7:0], U3VDIN, U3HDIN, U3DEIN
and U3VINCLK signal outputs from IC1508?
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), TF2_P/M(AJ24/AK24), 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), TF1_P/M(AH29/AH30), TF1_P/M(AH29/AH30), TCLK1_P/
M(AE29/AE30)
Check the panel module.
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?
NO
NO
YES
YES
YES
YES
6 – 8
YES
Is IC1502 (EEPROM) accessed by I2C, with HDMI con-
nected, to read the DDC_I2C CLOCK/DATA data?
Check the DDC line and its peripheral cir-
cuits (IC1502 (EEPROM) and its periph-
erals).
Check IC1507, IC1508 and their periph-
eral circuits.
NO
Check IC1508 and its peripheral circuits.
NO
Check the line between IC1508 and
IC3301.
NO
Check IC3301 and its peripheral control
circuits (IC5301, IC5302, IC8101, etc.).
NO
LC-37D90U
NO
NO