Sharp LC-60LE831U Service Manual page 78

LC-40/46/52/60LE835U/830U/832U/LC-60LE831U
Is INPUT-4 selected on the input select menu screen?
Does the HOT PLUG detection function?
Does the DDC5V signal come from pin (18) of SC1505 to pin (51) of IC1504
(HDMI_SW)?
Does the HPD signal come from pin (50) of IC1504 to pin (19) of SC1505?
Are there the TMDS signal inputs at pins (99/100) (CLK-/+), (1/2) (D0-/+), (3/4)
(D1-/+), (5/6) (D2-/+), all of IC1504?
Are there the all of TMDS inputs at pins (AM9/AL9) (CLK-/+), (AM10/AL10) (D0-/
+), (AM11/AL11) (D1-/+), (AM12/AL12) (D2-/+) of IC3303 (CPU)?
In LE835U.
Are the LVDS signal input to the pin of P2601?
LVDS0_FPGA_D0P/N (39/40pin), LVDS0_FPGA_D1P/N (37/38pin),
LVDS0_FPGA_D2P/N (35/36pin), LVDS0_FPGA_D3P/N (30/31pin),
LVDS0_FPGA_D4P/N (28/29pin), LVDS0_FPGA_CLKP/N_74MHz (32/33pin),
LVDS1_FPGA_D0P/N (25/26pin), LVDS1_FPGA_D1P/N (23/24pin),
LVDS1_FPGA_D2P/N (21/22pin), LVDS1_FPGA_D3P/N (16/17pin),
LVDS1_FPGA_D4P/N (14/15pin), LVDS1_FPGA_CLKP/N_74MHz (18/19pin).
In LE830U/LE831U/LE832U.
Is the T-CON PWB connected?
VBO_HTPDN (40pin), VBO_LOCKN (39pin) of P2604 become Low if there is
no problem in the connection.
Are the V-By-One signal input to the pin of P2604?
VBO_CN_TXA+/- (36/37pin), VBO_CN_TXB+/- (32/33pin),
VBO_CN_TXC+/- (28/29pin), VBO_CN_TXD+/- (24/25pin).
Check the panel module and harness.
<HDMI input> No video (5)-4
HDMI: No external input video [INPUT-4]
YES
YES
YES
YES
YES
YES
YES
6 – 14
NO Select INPUT-4 on the input select menu screen for
the right input signal.
Check the line between the input terminals of SC1505
NO
and IC1504.
Check IC1504 and its peripheral circuits
(pin70 of IC1504/SCL1: pin71 of IC1504, etc.).
NO Check the line between the pin (50) of IC1504 and the
pin (19) of SC1505.
Check IC1504 and its peripheral circuits
pin70 of IC1504/SCL1: pin71 of IC1504, etc.).
Is IC1504 (pin48/pin49) accessed by I2C, with HDMI
NO
connected, to read the DDC_I2C SDA/SCL data?
Check the DDC line and its peripheral circuits.
(IC1504 and its peripherals)
NO Check the line between IC1504 and IC3303, and their
peripheral circuits.
NO Check IC3303 and its peripheral circuits.
(IC3501/IC3502, etc)
NO Check the panel module and harness.
NO Check IC3303 and its peripheral circuits.
(IC3501/IC3502/IC3503, etc)
NO