電纜1756-L84E-NSE
維修技巧之
維修經(jīng)驗(yàn)總結(jié)
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(huì)損壞程序.但有資料介紹:因制作芯片的材料所致,隨著
時(shí)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(jìn)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(shí),還是小心為妙.筆者曾經(jīng)做過
多次試驗(yàn),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(fù)位電路
1.待修電路板上有大規(guī)模集成電路時(shí),應(yīng)注意復(fù)位問題.
2.在測試前裝回設(shè)備上,反復(fù)開,關(guān)機(jī)器試一試.以及多按幾次復(fù)
位鍵.
電纜1756-L84E-NSE
| 1756-L73 |
| 1756-L73EROM |
| 1756-L73EROMS |
| 1756-L73K |
| 1756-L73S |
| 1756-L73SK |
| 1756-L73SXT |
| 1756-L73XT |
| 1756-L74 |
| 1756-L74K |
| 1756-L75 |
| 1756-L75K |
| 1756-L7RMCN |
| 1756-L7RMEN |
| 1756-L7SP |
| 1756-L7SPK |
| 1756-L7SPXT |
| 1756-L81E |
| 1756-L81E-NSE |
| 1756-L81EK |
| 1756-L81EP |
| 1756-L81ES |
| 1756-L81ESK |
| 1756-L81EXT |
| 1756-L82E |
| 1756-L82E-NSE |
| 1756-L82EK |
| 1756-L82ES |
| 1756-L82ESK |
| 1756-L82EXT |
| 1756-L83E |
| 1756-L83E-NSE |
| 1756-L83EK |
| 1756-L83EP |
| 1756-L83ES |
| 1756-L83ESK |
| 1756-L83EXT |
| 1756-L84E |
| 1756-L84E-NSE |
| 1756-L84EK |
| 1756-L84ES |
| 1756-L84ESK |
| 1756-L84EXT |
| 1756-L85E-NSE |
| 1756-L85EK |
| 1756-L85EP |
| 1756-L85EXT |
| 1756-L8SP |
| 1756-L8SPK |
| 1756-LSC8XIB8I |
| 1756-LSC8XIB8IK |
| 1756-M02AE |
| 1756-M02AEK |
| 1756-M02AS |
| 1756-M02ASK |
| 1756-M03SE |
| 1756-M03SEK |
| 1756-M08SE |
| 1756-M08SEG |
| 1756-M08SEGK |
| 1756-M08SEK |
| 1756-M16SE |
| 1756-M16SEK |
| 1756-N2 |
| 1756-N2XT |
| 1756-OA16 |
| 1756-OA16I |
| 1756-OA16IK |
| 1756-OA16K |
| 1756-OA8 |
| 1756-OA8D |
| 1756-OA8E |
| 1756-OA8K |
| 1756-OB16D |
| 1756-OB16DK |
| 1756-OB16E |
| 1756-OB16EK |
| 1756-OB16I |
| 1756-OB16IEF |
| 1756-OB16IEFK |
| 1756-OB16IEFS |
| 1756-OB16IEFSK |
| 1756-OB16IK |
| 1756-OB16IS |
| 1756-OB32 |
| 1756-OB32K |
| 1756-OB8 |
| 1756-OB8EI |
| 1756-OB8EIK |
| 1756-OB8K |
| 1756-OBV8S |
| 1756-OC8 |
| 1756-OC8K |
| 1756-OF4 |
| 1756-OF4K |
| 1756-OF8 |
| 1756-OF8H |
| 1756-OF8HK |
| 1756-OF8I |
| 1756-OF8IH |
| 1756-OF8IHK |
| 1756-OF8IK |
| 1756-OF8K |
| 1756-OG16 |
| 1756-OG16K |
| 1756-OH8I |
| 1756-ON8 |
| 1756-ON8K |
| 1756-OV16E |
| 1756-OV32E |
| 1756-OV32EK |
| 1756-OW16I |
| 1756-OW16IK |
| 1756-OX8I |
| 1756-OX8IK |
| 1756-PA30XT |
| 1756-PA50 |
| 1756-PA50K |
| 1756-PA72 |
| 1756-PA72K |
| 1756-PA75 |
| 1756-PA75K |
| 1756-PA75R |
| 1756-PA75RK |
| 1756-PAR2 |
| 45C380 |
| 45C381A |
| 61C22A |
| 61C326 |
| 61C346 |
| 61C515 |
| O-51486-17 |
| O-51668-1 |
| O-51811-1 |
| O-51814-1 |
| O-51818-2 |
| O-51820-1 |
| O-51829-2 |
| O-51831-1 |
| 57C404B |
| 57407-4 |
| 57422 |
| 57C493 |
| 57C435 |
| 57552-4A |
| 61C500 |
| 61C599 |
| 0-52876 |
| 0-52875-1 |
| 0-57300 |
| 0-52808 |
| 57400 |
| 0-54392-2 |
| 0-54390 |
| 54392-2 |
| 57403-G |
| ES281CMB |
| 45C15A |
| 52876 |
| 57300 |
| 57405 |
| 52875-1 |
| 57392-2 |
| 0-48650-2 |
| 0-48651-2 |
| 0-48652 |
| 0-48652-30 |
| 0-48653-3 |
| 0-48654 |
| 0-48664-2 |
| 0-48672 |
| 0-48673 |
| 0-48675 |
| 0-48679 |
| 0-48680 |
| 0-48680-101 |
| 0-48680-111 |
| 0-48680-116 |
| 0-48680-117 |
| 0-48680-118 |
| 0-48680-210 |
| 0-48680-211 |
| 0-48680-212 |
| 0-48680-213 |
| 0-48680-216 |
| 0-48680-218 |
| 0-48680-310 |
| 0-48680-312 |
| 0-48680-521 |
| 0-48680-530 |
