1794-CE1 cpu
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(duì)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.
1794-CE1 cpu
| 1794-AENT |
| 1794-AENTR |
| 1794-AENTRXT |
| 1794-CE1 |
| 1794-CE3 |
| 1794-CJC2 |
| 1794-IA16 |
| 1794-IA8 |
| 1794-IA8I |
| 1794-IB10XOB6 |
| 1794-IB10XOB6XT |
| 1794-IB16 |
| 1794-IB16D |
| 1794-IB16XOB16P |
| 1794-IB16XT |
| 1794-IB32 |
| 1794-IB8 |
| 1794-IC16 |
| 1794-ID2 |
| 1794-IE12 |
| 1794-IE4XOE2 |
| 1794-IE4XOE2XT |
| 1794-IE8 |
| 1794-IE8XOE4 |
| 1794-IE8XT |
| 1794-IF2XOF2I |
| 1794-IF2XOF2IXT |
| 1794-IF4I |
| 1794-IF4IXT |
| 1794-IF8IH |
| 1794-IF8IHNFXT |
| 1794-IG16 |
| 1794-IH16 |
| 1794-IJ2 |
| 1794-IJ2XT |
| 1794-IM16 |
| 1794-IM8 |
| 1794-IP4 |
| 1794-IR8 |
| 1794-IRT8 |
| 1794-IRT8XT |
| 1794-IT8 |
| 1794-IV16 |
| 1794-IV32 |
| 1794-LBL |
| 1794-N2 |
| 1794-NM1 |
| 1794-OA16 |
| 1794-OA8 |
| 1794-OA8I |
| 1794-OB16 |
| 1794-OB16D |
| 1794-OB16P |
| 1794-OB16PXT |
| 1794-OB32P |
| 1794-OB8 |
| 1794-OB8EP |
| 1794-OB8EPXT |
| 1794-OC16 |
| 1794-OE12 |
| 1794-OE4 |
| 1794-OE4XT |
| 1794-OF4I |
| 1794-OF4IXT |
| 1794-OF8IH |
| 1794-OG16 |
| 1794-OM16 |
| 1794-OM8 |
| 1794-OV16 |
| 1794-OV16P |
| 1794-OV32 |
| 1794-OW8 |
| 1794-OW8XT |
| 1794-PS13 |
| 1794-PS3 |
| 1794-TB2 |
| 1794-TB3 |
| 1794-TB32 |
| 1794-TB32S |
| 1794-TB37DS |
| 1794-TB3G |
| 1794-TB3GK |
| 1794-TB3GS |
| 1794-TB3GSK |
| 1794-TB3K |
| 1794-TB3S |
| 1794-TB3SK |
| 1794-TB3T |
| 1794-TB3TK |
| 1794-TB3TS |
| 1794-TB3TSK |
| 1794-TB62DS |
| 1794-TBN |
| 1794-TBNF |
| 1794-TBNK |
| 1794-VHSC |
| 1796-CNET32 |
| 1799-12SPCON |
| 1799-AUXCON |
| 1799-BRKD |
| 1799-DNETSCON |
| 1799-DSCCON |
| 1799-DSSCON |
| 1799-MP20E |
| 1799-OQ10X |
| 1799ER-IQ10XOQ10 |
| 189-AB01 |
| 189-AB10 |
| 189-ALOA1 |
| 189-ALOA2 |
| PLC-OSC-230UC/48DC/100/SEN |
| PLC-OSC-24DC/24DC/2/ACT |
| PLC-BSP-230UC/21/SO46 |
| PLC-RSC-24DC/21 |
| PLC-RSC-24DC/21-21 |
| PLC-RSC-24DC/1/ACT |
| PLC-RSC-24DC/1-1/ACT |
| PLC-RSC-24DC/21HC |
| PLC-RSC-230UC/21 |
| PLC-BSC-230UC/21HC |
| PLC-BSC-230UC/21/SO46 |
| REL-MR-60DC/21 |
| PLC-BSC-230UC/21-21/SO46 |
| PLC-RSC-24UC/21 |
| REL-MR-110DC/21-21 |
| PLC-ESKGY |
| PLC-RSP-24DC/21AU |
| PLC-OSP-24DC/24DC/2 |
| FBST500-PLCBN |
| PLC-ATPBK |
| MACX MCR-EX-SL-RPSSI-I |
| MACX MCR-SL-CAC-5-I |
| MACX MCR-SL-CAC-5-I-UP |
| STEP-PS-100-240AC/12DC/3 |
| QUINT-PS-100-240AC/24DC/20 |
| QUINT-PS-100-240AC/24DC/2.5 |
| QUINT-PS-100-240AC/24DC/5 |
| QUINT-PS-3X400-500AC/24DC/5 |
| QUINT-PS-3X400-240AC/24DC/10 |
| QUINT-PS-100-240AC/24DC/10 |
| QUINT-PS-3X400-500AC/24DC/10 |
| QUINT-PS-3X400-240AC/24DC/20 |
| QUINT-PS-3X400-500AC/24DC/20 |
| QUINT-PS-3X400-500AC/24DC/30 |
| QUINT-PS-3X400-500AC/24DC/40 |
| QUINT-PS-100-240AC/48DC/5 |
| QUINT-PS-100-240AC/24DC/40 |
| QUINT-PS-100-240AC/12DC/10 |
| QUINT-PS-100-240AC/24DC/5/EX |
| QUINT-PS-100-240AC/24DC/10/EX |
| QUINT-DC-UPS/24DC/10 |
| MINIPS-100-240AC/24DC/1 |
| MINIPS-100-240AC/10-15DC/2 |
| STEP-PS-100-240AC/24DC/1.5 |
| FLSWITCH4TX/FX |
| FLSWITCH8TX |
| FLSWITCHMMHS |
| FLSWITCHSF14TX/2FX |
| FLSWITCHMCS16TX |
| FLSWITCHMCS14TX/2FX |
| FLSWITCHSF8TX |
| FLSWITCHSF6TX/2FX |
| FLSWITCHSFN5TX |
| FLSWITCHSFN4TX/FX |
| FLSWITCHSFN6TX/2FX |
| ETR-U-18-230UC/21 |
| MCR-C-UI-UI-450-DCI |
| MCR-CLP-UI-I-4 |
| MCR-VDC-UI-B-DC |
| MCR-C-UI-UI-DCI |
| MCR-C-UI-UI-DCI-NC |
| MCR-FL-C-UI-2UI-DCI |
| MCR-FL-C-UI-2UI-DCI-NC |
| MCR-C-U-U-DC |
| MCR-C-U-I-0-DC |
| MCR-C-I-U-0-DC |
| MCR-C-I-I-00-DC |
| MCR-C-I-U-4-DC |
| MCR-C-I-I-40-DC |
| MCR-C-U-I-4-DC |
| MCR-C-I-I-04-DC |
| MCR-1CLP-I-I-00 |
| MCR-2CLP-I-I-00 |
| MCR-CPS-I-I-44-E |
| MCR-SL-S-1-5-I-DCI-24 |
| MCR-T-UI-E-NC |
| MCR-PT100-I-DC |
| MCR-SL-PT100-I-DC24 |
| MCR-PT100-I |
| EMG22REL/KSR-24/21 |
| PT2-PE/S24VAC-ST |
