Sharp LC-70LE835E/RU, Service Manual

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LC-70LE835E/RU, 836E/S, 838E
6 – 10
No picture on the display (1)
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)]
YES
NO
Check IC3303 and its peripheral control circuits.
(IC2001, IC3501, IC3502, X3301, etc.)
Do above-mentioned LVDS signals output from connector
(P2601)? NO Check the line between IC3303 and P2601.
YES
Similarly, is LCD controller's control signal normal? NO Please check each control signal of DET_POW (DET_PNL12V),
PE (PNL_EN).
YES
LCD Controller Unit:
Do LVDS signals input to connector (LW) of LCD Controller Unit? NO Wire harness (LW) is checked.
YES
Check the panel module.
No picture on the display (2)
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).
(B)
(A)
Does video signal (I/CVBS) output from pin [9]
of TUNER (TU1102)? NO Check the tuner and its peripheral circuits.
Replace as required.
YES
Does video signal (TUNER_CVBS) input to pin [AK24/
CPU_CVBS0P] of IC3303 (Digital AV decode & Main
CPU)? NO Check the line between TU1102 and IC3303. (Q1106, etc...)
YES
Refer to “No picture on the display (1)”.
Does video signal (I/CVBS) output from pin [9] of
TUNER (TU1104)? NO Check the tuner and its peripheral circuits.
Replace as required.
YES
Does video signal (TUNER_CVBS) input to pin [AK24/
CPU_CVBS0P] of IC3303 (Digital AV decode & Main CPU)? NO Check the line between TU1104 and IC3303. (Q1106, etc...)
YES
Refer to “No picture on the display (1)”.