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1.将此电路里面的U25,U26的VCC PIN供电更改为5V_SYS供电.用来驱动此Buffer.不良现象依旧.
2.将控制VSYNC,HSYNC.Buffer组件U25.U26.移除,更改为用O欧姆电阻连接.不良现象依旧.
1.å°æ¤çµè·¯éé¢çU25ãU26çVCC PINä¾çµæ´æ¹ä¸º5V_SYSä¾çµï¼ç¨æ¥é©±å¨æ¤Bufferï¼ä¸è¯ç°è±¡ä¾æ§ã
To change the VCC PIN of U25, U26 power supply from 5V_SYS in this circuit , used to drive this Buffer, malnutrition remains.
2.å°æ§å¶VSYNC.HSYNC.Bufferç»ä»¶U25.U26.移é¤ï¼æ´æ¹ä¸ºç¨O欧å§çµé»è¿æ¥ï¼ä¸è¯ç°è±¡ä¾æ§ã
Remove the component of U25.U26. which control VSYNC,HSYNC. Buffer , change the o ohms resistance connection. malnutrition remains.
To change the VCC PIN of U25, U26 power supply from 5V_SYS in this circuit , used to drive this Buffer, malnutrition remains.
2.å°æ§å¶VSYNC.HSYNC.Bufferç»ä»¶U25.U26.移é¤ï¼æ´æ¹ä¸ºç¨O欧å§çµé»è¿æ¥ï¼ä¸è¯ç°è±¡ä¾æ§ã
Remove the component of U25.U26. which control VSYNC,HSYNC. Buffer , change the o ohms resistance connection. malnutrition remains.
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第1个回答 2012-08-17
After switching the power source from VCC PINs on U25 and U26 to 5V_sys in order to drive the buffer, the problem still persists.
After we removed U25 and U26, the controlling buffer components of VSYNC and HSYNC, and connected thru a a resistance of a few ohms, the problem remains.
After we removed U25 and U26, the controlling buffer components of VSYNC and HSYNC, and connected thru a a resistance of a few ohms, the problem remains.
第2个回答 2012-08-17
The promlem is still there when the supply of the U25 and U26 was changed from VCC PIN to 5V-SYS ,which is used to power the Buffer.
The problem is still there after we used a 0 ohm resistance as a connector instead of the U25 and U26 components controlling VSYNC,HSYNC and Buffer .
The problem is still there after we used a 0 ohm resistance as a connector instead of the U25 and U26 components controlling VSYNC,HSYNC and Buffer .
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