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C. Audio error
No audio/ Normal video
Established
date
Revised date
8/13
Error
symptom
Standard Repair Process
No audio
Screen normal
Check user
menu >
Speaker test
No sound
Y
N
Check audio 12.5V
of Power Board
Normal
voltage
Y
N
ත
A19
ත
A20+A18
Adjust Volume or mute to unmute
Replace Power Board and repair parts
Check
Speaker
disconnection
N
Y
Replace MAIN Board
End
Disconnection
Replace Speaker
- 31 -
2019
Содержание 28LM4 0B-PU Series
Страница 11: ... 2 5 0 11 2019 ...
Страница 13: ... 13 6 66 0 8 2019 ...
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Страница 16: ... 16 2019 4 Remove the screwV that lock the main board after removing the mirror line and function key line ...
Страница 17: ... 7 2019 5 Remove the tape and unplug the LVDS ...
Страница 18: ... 18 2019 6 Remove the tape that holds the speaker line and remove the horn ...
Страница 19: ... 19 2019 7 Remove the wall bracket ...
Страница 20: ... 20 2019 8 Remove the tape thaW holds the IR plate line and remove the IR plate ...
Страница 21: ... 21 2019 9 Place the removed mirror flat on the guard mat ...
Страница 22: ...7528 6 227 1 8 22 2019 ...
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Страница 69: ......