Sharp LC-60G9T, Service Manual

Page: 48 / 108

LC-60G9T / LC-70G9T
6 – 6
No sound from external output device (7)
Does not the sound of the audio signal output to HDMI1 go out?
Does audio signal output from pin[14] of SC1501 (HDMI1 terminal) ? YES Check SC1501 and peripheral circuits.
NO
Does audio signal output from pin[39/HECP] of IC2601(HDMI-SW) ? YES Check the line between IC2601 and SC1501.
NO
Does audio signal input to pin[36/HDMI_ARC_SPDIF] of IC2601 ? YES Check IC2601 and peripheral circuits.
NO
Does audio signal(HDMI_OPT_OUT) output from pin[Y32/
CPU_ASPDIF1] of IC3301(Digital AV decode & Main CPU)? YES Check the line between IC3301 and IC2601.
NO
Check IC3301 and its peripheral circuits.
No picture on the display (1)
The picture doesn't appear in all modes.
Is the signal output from IC3301(DIGITAL_AV_DECODER_&_MAIN_CPU) respectively?
[-(AT4/AU4), -(AP3/AR3), -(AT2/AU2), -(AR1/AR2)]
YES
NO
Check IC3301 and its peripheral control circuits.
(IC2004, IC3501, IC3502, IC3503, IC3504, X3301, etc.)
Do above-mentioned signals output from connector
(SC3801) ? NO Check the line between IC3301 and SC3801.
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 signals input to connector(LW) of LCD Controller Unit ? NO Wire harness (LV) is checked.
YES
Check the panel module.