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| led display shows abnormal |
Source:MaChen Yushengyuan New energy Co., Ltd. Time:2012-05-03 15:55:18 |
led display shows abnormal
Ⅰ. The entire screen is not bright (black)
1, the detection power is power.
To detect communication cable is plugged in, whether the wrong. (Synchronous Screen)
3, synchronous screen detect send a card and receiving card whether the communication green flashes.
4, computer monitors whether protected or display areas of black or pure blue. (Synchronous Screen)
II block unit board is not lit (black)
A continuous a few pieces of plate transverse direction is not lit, check for normal cell plate and abnormal cell plate between the cable connection is connected;
Or chip 245 is normal. 2 continuous a few pieces of plate longitudinal direction is not lit, check this list of power supply is normal.
III. Unit panel line does not shine
1, the foot of the check line with the 4953 output pin pass.
Check 138 is normal.
3, 4953 to check whether hot or burned.
4, check whether the 4953 high.
5, the check 138 and 4953 control foot pass.
IV cell board does not shine
1, check whether the normal 595.
2, check the upper and lower module corresponds to pass the foot is connected.
595 output pin to the module pin 3, check whether there is a pass.
Ⅴ. Unit board lack of color
1 check 245 R.G data output.
2, check the normal 595 output pin with the exception of the 595 input pin through-
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