触摸屏 1786-RPFM
.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.
触摸屏 1786-RPFM
| 1786-FS20 |
| 1786-FS200 |
| 1786-FS60 |
| 1786-RG6 |
| 1786-RPA |
| 1786-RPCD |
| 1786-RPFM |
| 1786-RPFRL |
| 1786-RPFRXL |
| 1786-RPFS |
| 1786-TCAP |
| 1786-TCT2BD1 |
| 1786-TJPR |
| 1786-TNCJ4 |
| 1786-TNCJI4 |
| 1786-TNCL10 |
| 1786-TNCLP4 |
| 1786-TNCLXT4 |
| 1786-TPR |
| 1786-TPRT2T |
| 1786-TPS |
| 1786-TPST2T |
| 1786-TPYR |
| 1786-TPYS |
| 1786-XT |
| 1787-PLUG10R |
| 1787-RSCABL |
| 1787-USADPTR |
| 1788-CN2DN |
| 1788-CN2FFR |
| 1788-CN2PAR |
| 1788-EN2DNR |
| 1788-EN2DNROM |
| 1788-EN2FFR |
| 1788-EN2PAR |
| 1788-FBJB4R |
| 1788-FBJB6 |
| 1789-L10M |
| 1789-L30 |
| 1789-L30M |
| 1789-L60M |
| 1790-0B16X |
| 1790-0V16X |
| 1790-0W8X |
| 1790-15CMCBL |
| 1790-16BV0X |
| 1790-7CMCBL |
| 1790-8BV8BX |
| 1790-8BV8VX |
| 1790-T0A8X |
| 1790-T0B16X |
| 1790-T0V16X |
| 1790-T0W8X |
| 1790-T16BV0X |
| 1790-T8A0X |
| 1790-T8BV8BX |
| 1790-T8BV8VX |
| 1790D-0B16 |
| 1790D-0V16 |
| 1790D-0W6 |
| 1790D-16BV0 |
| 1790D-8BV8B |
| 1790D-8BV8V |
| 1790D-N0C2 |
| 1790D-N4C0 |
| 1790D-T0A6 |
| 1790D-T0B16 |
| 1790D-T0B32 |
| 1790D-T0V16 |
| 1790D-T0V32 |
| 1790D-T0W6 |
| 1790D-T16BV0 |
| 1790D-T16BV16B |
| 1790D-T16BV16V |
| 1790D-T32BV0 |
| 1790D-T4R0 |
| 1790D-T4T0 |
| 1790D-T8A0 |
| 1790D-T8BV8B |
| 1790D-T8BV8V |
| 1790D-TN0C2 |
| 1790D-TN0V2 |
| 1790D-TN4C0 |
| 1790D-TN4V0 |
| 1791DS-IB12 |
| 1791DS-IB16 |
| 1791DS-IB4XOW4 |
| 1791DS-IB8XOB8 |
| 1791DS-IB8XOBV4 |
| 1791ES-IB16 |
| 1791ES-IB8XOBV4 |
| 1791ES-ID2SSIR |
| 1794-ACN15 |
| 1794-ACNR15 |
| 1794-ACNR15XT |
| 1794-ADN |
| 1794-ADNK |
| DEK-REL-G24/21 |
| EMG22-REL/KSR-24/21-21 |
| MDSTB2,5/16-G1-5,08 |
| MINIMCR-SL-TC-UI |
| PLC-OSC-24DC/24DC/2 |
| MCR-SWS-I |
| FLKMS-D50SUB/B |
| FLKM50/32M/PLC |
| FLKM50/32M/SI/PLC |
| FLK-D37SUB/B |
| FLSWITCHSF6TX/2FXST |
| UM45-D25SUB/B/ZFKDS |
| UM-16R-G24/21/PLC/F-SO3275 |
| FLSWITCH5TX |
| MCR-R-I-0-V-DC |
| MCR-PS-24DC/10DC |
| ES/LP-BW |
| MCR-DAC8/U-10B/BUS |
| MCR-SL-1CLP-I/I-00-4KV |
| MCR-SL-PT100-U-DC-24 |
| MSTB2,5/10-ST |
| EMG10-REL/KSR-G24/1-LC |
| EMG10-OE-24DC/48DC/100 |
| SAC-4P-M12MS/5,0-PUR |
| SAC-4P-M12MS/10,0-PUR |
| UMK-SE11,25-1PROFIL |
| SAC-4P-M12MS/3,0-PUR/M12FR-3L |
| EMG45-RELS/IR1-W230 |
| PLC-RSC-24DC/21-21AU |
| PLC-RSC-230UC/21-21AU |
| MINIPS-100-240AC/24DC/4 |
| EMG22RELS/KE-G24 |
| SAC-3P-M12MS-M8FS |
| MCR-T-UI |
| DEK-REL-24/1/1 |
| FLSPBM12DO8M12-2A |
| FLSPBM12DIO8/8M12 |
| FLSPBM12DI16M12 |
| FLCOMSERVERRS232 |
| SAC-2P-M12MSB/2,0-910/M12FSB |
| IBIL24DI16 |
| IBIL24DI2 |
| IBIL24DO16 |
| IBIL24DO8 |
| EMG10-OE-5DC/48DC/100 |
| ST-OV3-24DC/60DC/3 |
| MINIPS-100-240AC/5DC/3 |
| CM50-PS-120-230AC/24DC/2.5/F |
| MCR-SL-PT100-LP-I |
| IBSST24BK-T |
