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plc IC693ACC332
維修經驗總結
一.帶程序的芯片
1.EPROM芯片一般不宜損壞.因這種芯片需要紫外光才能擦除掉程序,
故在測試中不會損壞程序.但有資料介紹:因制作芯片的材料所致,隨著
時間的推移(年頭長了),即便不用也有可能損壞(主要指程序).所以要
盡可能給以備份.
2.EEPROM,SPROM等以及帶電池的RAM芯片,均極易破壞程序.這類芯片
是否在使用<測試儀>進行VI曲線掃描后,是否就破壞了程序,還未有定
論.盡管如此,同仁們在遇到這種情況時,還是小心為妙.筆者曾經做過
多次試驗,可能大的原因是:檢修工具(如測試儀,電烙鐵等)的外殼漏電
所致.
3.對于電路板上帶有電池的芯片不要輕易將其從板上拆下來.
二.復位電路
1.待修電路板上有大規模集成電路時,應注意復位問題.
2.在測試前裝回設備上,反復開,關機器試一試.以及多按幾次復
位鍵.
plc IC693ACC332
| IC693MDL734 | IC693PCM301 |
| IC693ACC323 | IC693CBL331 |
| IC693ACC302 | IC693CBL333 |
| IC693ACC300 | IC693PTM101 |
| IC693ACC301 | IC693MDL250 |
| IC693MAR590 | IC693PCM311 |
| IC693MDR390 | IC693CBL324 |
| IC693DSM324 | IC693CBL319 |
| IC693MDL931 | IC693CBL325 |
| IC693DSM314 | IC693CBL327 |
| IC693APU301 | IC693MDL260 |
| IC693MDL940 | IC693CBL328 |
| IC693APU305 | IC693CBL332 |
| IC693DNM200 | IC693CBL316 |
| IC693MDL760 | IC693LBR301 |
| IC693CPU374 | IC693ACC333 |
| IC693CPU372 | IC693CBL305 |
| IC693DSM302 | IC693PCM300 |
| IC693MDL930 | IC693CBL302 |
| IC693MDL916 | IC693CBL311 |
| IC693CPU367 | IC693CBL303 |
| IC693APU300 | IC693CBL334 |
| IC693ALG442 | IC693CBL313 |
| IC693APU302 | IC693CBL312 |
| IC693CPU370 | IC693NIU004 |
| IC693MDL754 | IC693CBL304 |
| IC693CPU366 | IC693MDL230 |
| IC693MDL753 | IC693CBK004 |
| IC693MDL758 | IC693MCD001 |
| IC693MDL752 | IC693MDL241 |
| IC693ALG392 | IC693PBS201 |
| IC693CPU363 | IC693CBL300 |
| IC693ALG223 | IC693CBL301 |
| IC693BEM320 | IC693CBK002 |
| IC693ALG391 | IC693CBK001 |
| IC693MDL748 | IC693MDL231 |
| IC693CPU360 | IC693MDL330 |
| IC693ALG390 | IC693PBM200 |
| IC693CPU350 | IC693MDL340 |
| IC693CPU331 | IC693MLX000 |
| IC693ALG222 | IC693ACC308 |
| IC693MDL742 | IC693MDL240 |
| IC693MDL741 | IC693PIF350 |
| IC693MDL740 | IC693MCM001 |
| IC693CPU323 | IC693DNS201 |
| IC693MDL733 | IC693CBL330 |
| IC693ACC400 | IC693BEM331 |
| IC693ACC350 | IC693LBR302 |
| IC693ALG220 | IC693PWR330 |
| IC693ACC341 | IC693ACC318 |
| IC693ACC760 | IC693PWR328 |
| IC693ALG221 | IC693ACC317 |
| IC693MDL732 | IC693MDL646 |
| IC693CPU313 | IC693MDL655 |
| IC693ACC338 | IC693MDL654 |
| IC693ACC337 | IC693MDL645 |
| IC693MDL730 | IC693ACC319 |
| IC693ACC336 | IC693CHS397 |
| IC693MDL731 | IC693ACC307 |
| IC693ACC335 | IC693ACC311 |
| IC693MDL660 | IC693ACC305 |
| IC693CMM321 | IC693ACC309 |
| IC693ACC331 | IC693PWR321 |
| IC693CPU311 | IC693PWR322 |
| IC693ACC330 | IC693CHS399 |
| IC693ACC329 | IC693MDL634 |
| IC693ACC328 | IC693MDL632 |
| IC693ACC334 | IC693ACC306 |
| IC693CMM311 | IC693CHS398 |
| IC693PWR332 | IC693ACC303 |
| IC693TCM303 | IC693ACC313 |
| IC693CMM302 | IC693CHS393 |
| IC693ACC320 | IC693ACC310 |
| IC693ACC315 | IC693PTM100 |
| IC693TCM302 | IC693PIF301 |
| IC693MDL648 | IC693CHS392 |
| IC693ACC312 | IC693MDL390 |
| IC693PWR331 | IC693MDL350 |
| IC693ACC332 | IC693CHS391 |
| IC693ACC316 | IC693CBL329 |
| IC693PRG300 | |
| IC693PIF400 |
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