Sharp LC-70LE835E/RU Service Manual page 56

LC-70LE835E/RU, 836E/S, 838E
The picture doesn't appear in all modes.
Is the LVDS signal output from IC3303 (DIGITAL_AV_DECODER_&_MAIN_CPU) respectively?
[LVDS0_D0N/P (B15/A15), LVDS0_D1N/P (B16/A16), LVDS0_D2N/P (B17/A17), LVDS0_CLKN/P_74MHz (B18/A18), LVDS0_D3N/P (B19/A19),
LVDS0_D4N/P (B20/A20), LVDS1_D0N/P (C15/D15), LVDS1_D1N/P (E15/E16), LVDS1_D2N/P (C17/D17), LVDS1_CLKN/P_74MHz (E17/E18),
LVDS1_D3N/P (C19/D19), LVDS1_D4N/P (E19/E20)]
Do above-mentioned LVDS signals output from connector
(P2601)?
Similarly, is LCD controller's control signal normal?
LCD Controller Unit:
Do LVDS signals input to connector (LW) of LCD Controller Unit?
Check the panel module.
Does not the picture come out when VHF/UHF is received?
In the case of LE835, 838 series, refer to (A).
In the case of LE836 series, refer to (B).
Does video signal (IFTU_AIF+/CVBS) output from pin [9]
of TUNER (TU1102)?
Does video signal (TUNER_CVBS) input to pin [AK24/
CPU_CVBS0P] of IC3303 (Digital AV decode & Main
CPU)?
Refer to "No picture on the display (1)".
(B)
Does video signal (IFTU_AIF+/CVBS) output from pin [9] of
TUNER (TU1104)?
Does video signal (TUNER_CVBS) input to pin [AK24/
CPU_CVBS0P] of IC3303 (Digital AV decode & Main CPU)?
Refer to "No picture on the display (1)".
No picture on the display (1)
YES
YES
YES
YES
No picture on the display (2)
(A)
YES
YES
YES
YES
Check IC3303 and its peripheral control circuits.
(IC2001, IC3501, IC3502, X3301, etc.)
NO Check the line between IC3303 and P2601.
NO Please check each control signal of DET_POW (DET_PNL12V),
PE (PNL_EN).
NO Wire harness (LW) is checked.
NO Check the tuner and its peripheral circuits.
Replace as required.
NO Check the line between TU1102 and IC3303. (Q1106, etc...)
NO Check the tuner and its peripheral circuits.
Replace as required.
NO Check the line between TU1104 and IC3303. (Q1106, etc...)
6 – 10
NO