Siemens 505-7202 触摸屏 品质保证
.功能与参数测试
1.<测试仪>对器件的检测,仅能反应出截止区,放大区和饱和区.但不
能测出工作频率的高低和速度的快慢等具体数值等.
2.同理对TTL数字芯片而言,也只能知道有高低电平的输出变化.而无
法查出它的上升与下降沿的速度.
四.晶体振荡器
1.通常只能用示波器(晶振需加电)或频率计测试,万用表等无法测量,
否则只能采用代换法了.
2.晶振常见故障有:a.内部漏电,b.内部开路c.变质频偏d.外围相连电
容漏电.这里漏电现象,用<测试仪>的VI曲线应能测出.
3.整板测试时可采用两种判断方法:a.测试时晶振附近既周围的有关
芯片不通过.b.除晶振外没找到其它故障点.
4.晶振常见有2种:a.两脚.b.四脚,其中第2脚是加电源的,注意不可随
意短路.
五.故障现象的分布
1.电路板故障部位的不完全统计:1)芯片损坏30%, 2)分立元件损坏30%,
3)连线(PCB板敷铜线)断裂30%, 4)程序破坏或丢失10%(有上升趋势).
2.由上可知,当待修电路板出现联线和程序有问题时,又没有好板子,既
不熟悉它的连线,找不到原程序.此板修好的可能性就不大了.
Siemens 505-7202 触摸屏 品质保证
| Siemens 505-6660A | 6SN1118-0DM33-0AA0 |
| Siemens 505-6660B | 6SN1118-0NH00-0AA2 |
| Siemens 505-6830 | 6SN1118-0NH11-0AA0 |
| Siemens 505-6840 | 6SN1118-0NH10-0AA0 |
| Siemens 505-6850A | 6SN1118-0NJ01-0AA0 |
| Siemens 505-6850B | 6SN1118-0NK01-0AA0 |
| Siemens 505-6851A | 6SN1121-0BA11-0AA0 |
| Siemens 505-6851B | 6SN1121-0BA11-0AA1 |
| Siemens 505-6860 | 6SN1121-0BA13-0AA0 |
| Siemens 505-6870 | 6SN1121-0DA11-0AA0 |
| Siemens 505-7002 | 6SN1121-0DA13-0AA0 |
| Siemens 505-7003 | 6SN1122-0BA11-0AA0 |
| Siemens 505-7012 | 6SN1122-0BA11-0AA1 |
| Siemens 505-7012A | 6SN1122-0BA12-0AA0 |
| Siemens 505-7016 | 6SN1123-1AA00-0AA0 |
| Siemens 505-7028 | 6SN1123-1AA00-0AA1 |
| Siemens 505-7028A | 6SN1123-1AA00-0BA1 |
| Siemens 505-7038 | 6SN1123-1AA00-0CA0 |
| Siemens 505-7101 | 6SN1123-1AA00-0CA1 |
| Siemens 505-7102 | 6SN1123-1AA00-0DA0 |
| Siemens 505-7190 | 6SN1123-1AA00-0DA1 |
| Siemens 505-7201 | 6SN1123-1AA00-0EA1 |
| Siemens 505-7202 | 6SN1123-1AA00-0FA0 |
| Siemens 505-7339 | 6SN1123-1AA00-0GA0 |
| Siemens 505-7340 | 6SN1123-1AA00-0HA0 |
| Siemens 505-7354 | 6SN1123-1AA00-0HA1 |
| Siemens 505-9201 | 6SN1123-1AA00-0JA0 |
| Siemens 505-CP1434TF | 6SN1124-1AB00-0BA0 |
| Siemens 505-CP2572 | 6SN1124-1AB00-0CA0 |
| Siemens 505/ATM-0220 | 6SN1128-1EA00-0CA0 |
| Siemens 525-1102 | 6SN1130-1AA11-0AA0 |
| Siemens 535-1212 | 6SN1130-1AA11-0CA0 |
| Siemens 545-1101 | 6SN1130-1AA11-0DA0 |
| Siemens 545-1102 | 6SN1130-1AA11-0EA0 |
| Siemens 545-1103 | 6SN1130-1AA11-0FA0 |
| Siemens 545-1104 | 6SN1130-1AA11-0GA0 |
| Siemens 545-1105 | 6SN1130-1AA12-0AA0 |
| Siemens 545-1106 | 6SN1130-1AA12-0CA0 |
| Siemens 2460444-8002 | 6SN1130-1AA12-0DA0 |
| Siemens 2460446-8001 | 6SN1130-1AA12-0EA0 |
| Siemens 2460451-8004 | 6SN1130-1AA12-0FA0 |
| Siemens 2461306-8001 | 6SN1130-1AA12-0GA0 |
| Siemens 2491178-8003 | 6SN1130-1AD11-0AA0 |
| Siemens 2491809-8002 | 6SN1130-1AD11-0BA0 |
| Siemens 2492144-8001 | 6SN1130-1DA11-0AA0 |
| Siemens 2492144-8002 | 6SN1130-1DA11-0DA0 |
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