Sharp LC32SB27U - LC - 32" LCD TV Service Manual page 55

HDMI: No external input video [INPUT-7]
Is INPUT-7 selected on the input select menu screen?
Select INPUT-7 on the input select menu screen for the right input
signal.
YES
Does the HOT PLUG detection function?
Does the DDC5V signal come from pin (18) of SC1601 to pin (32) of IC1609
(HDMI_SW)?
Check the line between the input terminals of SC1601 and IC1609.
Check IC1609 and its peripheral circuits (I2C_SDA: pin53 of IC1609/
I2C_SCL: pin54 of IC1609, etc.).
YES
Does the HPD signal come from pin (31) of IC1609 to pin (19) of SC1601?
Check the line between the pin (31) of IC1609 and the pin (19) of
SC1601.
Check IC1609 and its peripheral circuits (I2C_SDA: pin53 of IC1609/
I2C_SCL: pin54 of IC1609, etc.).
YES
Are there the TMDS signal inputs at pins (65/66) (CLK-/+), (67/68) (D0-/+), (69/70)
(D1-/+), (71/72) (D2-/+), all of IC1609?
Is IC1609 (pin29/pin30) accessed by I2C, with HDMI connected, to
read the DDC_I2C SCL/SDA data?
Check the HDMI_DDC_SDA_IN1, HDMI_DDC_SCL_IN1 line and its
peripheral circuits. (IC1609 and its peripherals).
YES
Are there the TMDS signal inputs at pins (F20/F19) (CLK-/+), (E21/E20) (D0-/+),
(D22/D21) (D1-/+), (C22/C21) (D2-/+), all of IC8001 (CPU)?
YES
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001?
LV0OUT0P/M (N19/N20), LV0OUT1P/M (N21/N22),
LV0OUT2P/M (P19/P20), LV0OUT3P/M (R19/R20),
LV0CK0P/M (P21/P22)
YES
Check the panel module.
<HDMI input> No video (6)-2
NO
NO
NO
NO
NO
6 – 5
LC-32D47U/LC-32SB27U/LC-C3237U
NO Check IC1609, IC8001 and their peripheral cir-
cuits.
NO Check IC8001 and its peripheral circuits.
(IC8251, etc.)