Troubleshooting Table - Sharp TU-X1U Service Manual

TU-X1U
CHAPTER 4.
TUX1U

TROUBLESHOOTING TABLE

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