Sharp LC-32SV502B, Руководство по обслуживанию

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LC-32SV502B/LC-42SV502B/LC-42SV602B/LC-46SV602B/LC-46SV502L
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No sound from external input devices (3)
↓
Does not the sound of the audio signal input to (VGA) go out?
MAIN UNIT:
↓
↓ YES
↓ YES
No sound from external input devices (4)
↓
Does not the sound of the audio signal input to (HDMI1/2) go out?
↓
↓ YES
No picture on the display (1)
↓
The picture doesn't appear in all modes.
MAIN UNIT:
↓
↓ NO
YES ↓
↓ YES
PANEL_UNIT:
↓ YES
↓ YES
Is the audio signal properly sent to pin (2) (VGA_Audio_L_In) and
pin (3) (VGA_Audio_R_In) of CN104?
NO
Check the connection to CN104 and the external input device.
Refer to “ No sound output in all modes ” .
Is the audio signal properly sent to pin (AL30) (VGA_L_In) and pin
(AL32) (VGA_R_In of IC U401? NO Check the line between CN104 and IC U401.
Refer to
“
No sound output in all modes
”
.
Is picture of the signal input from HDMI 1/2 displayed? NO Refer to “ Does not the picture of the HDMI signal input to
HDMI1/2 go out? ” .
Is LCD controller's control signal normal?
Check the line between IC U401 and CN403.
NO
Control signals BRIGHT_ADJ, INVERTER_ON_OFF,
PANEL_VCC_ON/OFF, and it peels off and whether normality is
checked.
Check the panel module.
Similarly, is the LVDS signal input to connector of the panel
module?
NO
Wire harness is checked. (Main board to Panel module )
Is LVDS signal output from 1st_channel and 2nd_channel of IC U401 in each mode?
(O0/O1/O2/O3/OCK)
Check IC U401 and its peripheral control circuits.
Is the above-mentioned LVDS signals output to connector CN403?
NO