Sharp TU-X1U, Service Manual

Page: 28 / 115

TU-X1U
4 – 1
TUX1U
Service Manual
CHAPTER 4.
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE
No video (1)
COMPOSITE: No external input video
[INPUT-1] COMPOSITE: No external input video
[INPUT-2] COMPOSITE: No external input video
[INPUT-3]
Is INPUT-1 selected on the input select
menu screen? Is INPUT-2 selected on the input select menu
screen? Is INPUT-3 selected on the input select
menu screen?
YES
NO
YES
NO
YES
NO
Select INPUT-1 on the input
select menu screen for the right
input signal. Select INPUT-2 on the input
select menu screen for the right
input signal. Select INPUT-3 on the input
select menu screen for the right
input signal.
Does the INPUT-1 IN1_V_PLG
detection function? Does the INPUT-2 IN2_V_PLG
detection function? Does the INPUT-3 IN3_VPLG
detection function?
Check the line between pin (5)
of input terminal (J501) and pin
(J30) of IC8001(CPU).
J501 pin (5)
P1101 pin (21)
SC2202 pin (21)
IC8001 pin (J30)
Check the line between pin (2) of
input terminal (J501) and pin
(H32) of IC8001(CPU).
J501 pin (2)
P1101 pin (23)
SC2202 pin (23)
IC8001 pin (H32)
Check the line between pin(7)
of input terminal (J2201) and
pin (AG33) of IC8001(CPU).
Is there the COMPOSITE signal input at pin
(AN16) of IC8001 (CPU)? Is there the COMPOSITE signal input at pin
(AN17) of IC8001 (CPU)? Is there the COMPOSITE signal input at pin
(AP20) of IC8001 (CPU)?
YES
NO
YES
NO
YES
NO
Check the line between pin (4)
of J501 and pin (AN16) of
IC8001.
J501 pin (4)
P501 pin (7)
SC2203 pin (7)
IC8001 pin (AN16)
Check the line between pin (1) of
J501 and pin (AN17) of IC8001.
J501 pin (1)
P501 pin (17)
SC2203 pin (17)
IC8001 pin (AN17)
Check the line between pin (6)
of J2201 and pin (AN17) of
IC8001.
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
NO
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) Check IC8001 and its peripheral
circuits. (IC8151 thru IC8154,
etc.)
NO Check the line between IC8001
and IC4601, and their periph-
eral circuits.
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)
NO
Check the line between IC4601
and IC4504, and their periph-
eral circuits.
YES