52
LC-45GD5U
TROUBLE SHOOTING TABLE
(Continued)
Are HDMI_H, HDMI_V and
Y
, Pb and Pr signals sent to pins 2, 3, 14, 17 and 20 of IC1912 respectively?
No video signal from HDMI input
NO
Are signals supplied from HDMI (SC1901)
connector to input terminals R1X0– (pins 63 and
62) R1X1– (pins 67 and 66) R1X2– (pins 71 and
70), and R1XC– (pins 59 and 58) of IC1912
(HDCP_LSI)?
Is IC1913 (E2PROM) accessed with I2C when connecting to HDMI equipment and is DDC_I2C_CLOCK/DA
T
A
read out?
YES
YES
Check the external HDMI equipment settings.
NO
Check IC1913 and its peripheral circuits.
YES
Are RESET#, INT
and SCDT
signals supplied to pins 102, 104 and 103 of IC1912 respectively?
YES
Check IC1912 and its peripheral circuits.
NO
Check between IC1912 and IC800 (FPGA).
NO
Check IC1912 and its peripheral circuits.
YES
Are HDMI_H and HDMI_V signals sent from pins 1
1
and 3 of IC1903 (BUFFER) respectively?
Are
Y
, Pb and Pr signals sent from pins 20, 18 and 16 of IC1901 (MUL
TI_PLEXER) respectively?
NO
Check IC1903, IC1901 and the peripheral circuits.
YES
Are
Y
, Pb and Pr signals sent to pins 20, 18 and 16 of IC3807 (MUL
TI_PLEXER) respectively?
NO
Check IC3807 and its peripheral circuits.
YES
Are HDMI_H and HDMI_V signals sent from pins 9 and 10 of
A
V
unit connector PB (P5404) respectively?
Are
Y
, Pb and Pr signals sent from pins 22, 20 and 18 of
A
V
unit connector PB (P5404) respectively?
NO
Check IC3807, 1903 and the peripheral circuits.
YES
Are HDMI_H and HDMI_V signals supplied to pins 9 and 10 of main unit connector PB (CN1800) respectively?
Are
Y
, Pb and Pr signals supplied to pins 22, 20 and 18 of main unit connector PB (CN1800) respectively?
NO
Check the "PB" harness.
YES
Are HDMI_H and HDMI_V signals supplied to pins 26 and 25 of IC3701 (A/D_CONV
.) respectively?
Are
Y
, Pb and Pr signals supplied to pins 8, 1
1
and 13 of IC3702 (L.P
.F) respectively?
NO
Check IC3701, 3702 and the peripheral circuits.
YES
Are
Y
, Pb and Pr signals supplied to pins 8, 2 and 14 of IC3700 (A/D_CONV
.) respectively?
NO
Check IC3700 and its peripheral circuits.
