Sharp TU-X1U Service Manual page 30

TU-X1U
COMPONENT: No external input video [INPUT-1]
Is INPUT-1 selected on the input select menu screen?
Is the INPUT-SELECT for the input signal?
Select INPUT-1 on the input select menu screen
for the right input signal.
Does the INPUT-1 IN1_Y_PLG detection function?
Check the line between pin (7) of input terminal
(J501) and pin (J34) of IC8001 (CPU).
J501 pin (7)
P1101 pin (20)
SC2202 pin (20)
IC8001 pin (J34)
YES
Are there the COMPONENT video signal inputs at pins
(AM21)(Y)/(AN21)(Pb) and (AL21)(Pr) of IC8001 (CPU)?
Check the line between the input terminals of J501
and IC8001.
J501 pin (6)(Y)
P501 pin (1)
SC2203 pin (1)
IC8001 pi n(AM21)
YES
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001
(CPU)?
LVDS_TX_0_DATA0_P/N (C7/B7), LVDS_TX_0_DATA1_P/N (E7/D7),
LVDS_TX_0_DATA2_P/N (C6/B6), LVDS_TX_0_DATA3_P/N (C5/B5),
LVDS_TX_0_DATA4_P/N (E5/D5), LVDS_TX_0_CLK_P/N (E6/D6),
LVDS_TX_1_DATA0_P/N (B4/A4), LVDS_TX_1_DATA1_P/N (E4/D4),
LVDS_TX_1_DATA2_P/N (B3/A3), LVDS_TX_1_DATA3_P/N(B1/B2),
LVDS_TX_1_DATA4_P/N (F5/F6), LVDS_TX_1_CLK_P/N (C2/C3),
YES
Are the LVDS signal inputs at the LVDS 1st channel and 2nd channel of IC4601
(FPGA)?
LVDS_TX_0_DATA0_P/N (T3/R3), LVDS_TX_0_DATA1_P/N (T5/T4),
LVDS_TX_0_DATA2_P/N (R7/T7), LVDS_TX_0_DATA3_P/N (R11/P11),
LVDS_TX_0_DATA4_P/N (T13/R13), LVDS_TX_0_CLK_P/N (P9/N9),
LVDS_TX_1_DATA0_P/N (B14/A14), LVDS_TX_1_DATA1_P/N (B13/A13),
LVDS_TX_1_DATA2_P/N (A9/A10), LVDS_TX_1_DATA3_P/N (A4/A5),
LVDS_TX_1_DATA4_P/N (C3/B3), LVDS_TX_1_CLK_P/N (A8/B8)
YES
Are the Parallel Video Signal inputs at the pins of IC4504 (HDMI_Tx)?
HDMITX_G9-0 pin (71/72/73/74/75/77/78/79/80/81),
HDMITX_B9-0 pin (84/85/86/90/91/92/93/94/95/96),
HDMITX_R9-0 pin (56/57/58/59/60/61/62/63/67/68),
HDMITX_CLK pin (88), HDMITX_DE pin (1), HDMITX_HD pin (2), HDMITX_VD
pin (3)
YES
Does the HOT PLUG detection function?
Is the DDC5V signal output at the pin (18) of SC4501 (HDMI_OUTPUT)?
NO
NO
pin (11)(Pb) pin (15)(Pr)
pin (3) pin (5)
pin (3) pin (5)
pin (AN21) pin (AL21)
No video (2)
COMPONENT: No external input video [INPUT-3]
Is INPUT-3 selected on the input select menu screen?
Is the INPUT-SELECT for the input signal?
Select INPUT-3 on the input select menu screen for the right
input signal.
Does the INPUT-2 C2_PLUG detection function?
Check the line between pin (2) of input terminal (J502) and pin
(AH10) of IC8001 (CPU).
YES
Are there the COMPONENT video signal inputs at pins (AN22)(Y)/
(AP22)(Pb) and (AL22)(Pr) of IC8001 (CPU)?
Check the line between the input terminals of J2202 and
IC8001.
J2202 pin (6)(Y)
IC8001 pin(AN22) pin (AP22) pin (AL22)
YES
NO
NO
NO
NO
4 – 3
NO
NO
pin (5)(Pb) pin (4)(Pr)
Check IC8001 and its peripheral circuits.
(IC8151 thru IC8154, etc.)
Check the line between IC8001and IC4601, and
their peripheral circuits.
Check the line between IC4601 and IC4504,
and their peripheral circuits.
Check the line between SC4501 and IC4503,
and their peripheral circuits.