L32A404
10
2). No Picture, Picture Failed (Color Failed, Dark Picture, Beat Noise, Etc.)
First, confirm the connection of all connectors between Board's, then survey by following the flowchart as shown
below.
CN701 (1) 3.3V
(2) 0~3.3V
(3)~(4) 12V
(5)~(7) 0V
(8)~(9) 24V
(10)~(12) 5V
No Picture, Picture failed
(Color failed, Dark picture,
Beat noise, etc.)
Occured at only
Video1 input (CVBS), or
Video2 input (CVBS, S2)?
Main Board
No
Yes
Main Board
Voltage of all pin of
CN701 on Main Board is
correct?
Power Board
No
Yes
Summary of Contents for ALPHA L32A404
Page 4: ...L32A404 4 Dimensions ...
Page 13: ...L32A404 13 Power Board ...
Page 31: ...L32A404 31 PCB Layout Main Board 715G3269M01001005K ...
Page 32: ...L32A404 32 ...
Page 33: ...L32A404 33 Power Board 715G3261P02000003S ...
Page 34: ...L32A404 34 ...
Page 35: ...L32A404 35 Key Board 715G3293 1 IR Board 715G3482 1 ...