L42A404
11
3). No Sound, Sound Failed (Loading Interrupt, Noise, Etc.)
First, confirm the connection of all connectors between Board's and speakers, then survey by following the flowchart
as shown below.
No Sound, Sound failed
(Loading interruption,
Noise, etc)
Occured at only
Video1 input (CVBS), or
Video2 input (CVBS, S2)?
Main Board
No
Yes
Main Board or Speaker units
Voltage of
pin No.3 or 4 of CN701 on
Main Board is 12V?
Power Board
No
Yes
Summary of Contents for Alpha L42A404
Page 4: ...L42A404 4 Dimensions ...
Page 31: ...L42A404 31 PCB Layout Main Board 715G3269M01001005K ...
Page 32: ...L42A404 32 ...
Page 33: ...L42A404 33 Power Board 715G3196 3 ...
Page 34: ...L42A404 34 ...
Page 35: ...L42A404 35 ...
Page 36: ...L42A404 36 Key Board 715G3293 1 IR Board 715G3482 1 ...
Page 72: ...L42A404 72 Accessories 0M1G 940 10225 CR3 Part No 089T702A18N BL 0M1G 940 10225 CR3 ...
