Sharp LC-32A28L Service Manual page 39

Does not the sound of the audio signal input to HDMI1/2 go out?
Is picture of the signal input from HDMI1/2 displayed?
Refer to "No sound output in all modes".
No audio signal output from LINE_AUDIO_OUTPUT terminal.
TEREMINAL UNIT:
Is audio signal output from IC U601 sent to pin(12)(LO_L) and pin
(3)(LO_R) of LINE_AUDIO_OUT connector(CN601)?
Is the audio signal output from IC U401 pin(110) (AL1) and pin(106)
(AR1) sent to pin(13)(-INL) and pin(2)(-INR) of IC U601?
Check IC U401 and its peripheral circuits.
The picture doesn't appear in all modes.
MAIN UNIT:
Is LVDS signal output from 1st_channel and 2nd_channel of IC U401 in each mode?
(A0N/A0P),(A1N/A1P),(A2N/A2P),(A3N/A3P),(CLK1N/CLK1P)
Is the above-mentioned LVDS signals output to connector CN110?
Is LCD controller's control signal normal?
PANEL_UNIT:
Similarly, is the LVDS signal input to connector of the panel
module?
Check the panel module.
No sound from external input devices (4)
↓
↓
↓YES
The audio signal is not output (1)
↓
↓
↓NO
↓NO
No picture on the display (1)
↓
↓
YES
↓YES
↓YES
↓YES
2008-03-14
NO Refer to "Does not the picture of the HDMI signal input to
HDMI1/2 go out?".
YES Check the connection to LINE_AUDIO_OUT and external
devices.
YES
Check the line between IC U401 and IC U601.
Check IC U401 and its peripheral control circuits.
NO
Check the line between IC U401 and CN110.
NO
Control signals BRIGHT_ADJ, INVERTER_ON_OFF,
PANEL_VCC_ON/OFF, and it peels off and whether normality is
checked.
NO Wire harness is checked.
39
LC-32A28L, LC-42A48L
↓NO