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您的位置:欢乐生肖 > 工控维修 > 触摸屏维修 触摸屏维修
西门子触摸屏维修
西门子触摸屏维修常见的问题:包括西门子触摸屏不可正常开机、花屏、白屏、黑屏、不能触摸、触摸反应慢、解密编程及触摸屏触摸镜片的损坏以及液晶屏的损坏等,公司多种型号都有配件。深圳英成机电设备有限公司长期从事西门子触摸屏维修,具有整套检测设备,经验丰富,价格实在,周期短,修复率高,擅长解决各种疑难杂症,欢迎来电咨询郭生
常见故障
1.触摸屏不准
 
[故障现象]
 
  一台表面声波触摸屏,用手指触摸显示器屏幕的部位不能正常地完成对应的操作。
 
[故障分析处理]
 
  这种现象可能是声波触摸屏在使用一段时间后,屏四周的反射条纹上面被灰尘覆盖,可用一块干的软布进行擦拭,然后断电、重新启动计算机并重新校准。还有可能是声波屏的反射条纹受到轻微破坏,如果遇到这种情况则将无法完全修复。
 
  如果是电容触摸屏在下列情况下可运行屏幕校准程序:(开始--程序--Microtouch Touchware)
 
1)第一次完成驱动软件的安装。
2)每次改变显示器的分辨率或显示模式后。
3)每次改变了显示的显示区域后。
4)每次调整了控制器的频率后。
5)每次光标与触摸点不能对应时。
 
  校准后,校准后的数据被存放在控制器的寄存器内,所以每次启动系统后无需再校准屏幕。
 
2.触摸屏无响应
 
[故障现象]
 
  一台触摸屏不能工作,触摸任何部位都无响应。
 
[故障分析处理]
 
  首先检查各接线接口是否出现松动,然后检查串口及中断号是否有冲突,若有冲突,应调整资源,避开冲突。再检查触摸屏表面是否出现裂缝,如有裂缝应及时更换。还需要检查触摸屏表面是否有尘垢,若有,用软布进行清除。观察检查控制盒上的指示灯是否工作正常,正常时,指示灯为绿色,并且闪烁。
 
  如果上面的部分均正常,可用替换法检查触摸屏,先替换控制盒,再替换触摸屏,最后替换主机。
 
  
维修案例

西门子触摸屏维修TP270

故障现象:通电DC24V,屏幕无光,电流约230mA

修复过程:用手触摸屏幕,蜂鸣器有响应,说明程序运行正常。量高压条12VDC电压正常,控制电压ENABLE低有效为低电平正常。说明故障在高压发生电路或灯管已经损坏。拆开发现灯管一头已经发黑,更换灯管后仍然无光,检查高压变压器也已损坏。市面上无此高压变压器,于是买一个LCD的带两管的高压条,接好线后固定,通电正常,故障排除。

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