产品详情
机架 1756-L72EROM
维修经验总结
一.带程序的芯片
1.EPROM芯片一般不宜损坏.因这种芯片需要紫外光才能擦除掉程序,
故在测试中不会损坏程序.但有资料介绍:因制作芯片的材料所致,随着
时间的推移(年头长了),即便不用也有可能损坏(主要指程序).所以要
尽可能给以备份.
2.EEPROM,SPROM等以及带电池的RAM芯片,均极易破坏程序.这类芯片
是否在使用<测试仪>进行VI曲线扫描后,是否就破坏了程序,还未有定
论.尽管如此,同仁们在遇到这种情况时,还是小心为妙.笔者曾经做过
多次试验,可能大的原因是:检修工具(如测试仪,电烙铁等)的外壳漏电
所致.
3.对于电路板上带有电池的芯片不要轻易将其从板上拆下来.
二.复位电路
1.待修电路板上有大规模集成电路时,应注意复位问题.
2.在测试前装回设备上,反复开,关机器试一试.以及多按几次复
位键.
机架 1756-L72EROM
| 1756-A10 |
| 1756-A13 |
| 1756-A17 |
| 1756-A4 |
| 1756-A7 |
| 1756-BA1 |
| 1756-BA2 |
| 1756-BATA |
| 1756-CN2 |
| 1756-CN2R |
| 1756-CNB |
| 1756-CNBR |
| 1756-DHRIO |
| 1756-DNB |
| 1756-EN2T |
| 1756-EN2TR |
| 1756-EN3TR |
| 1756-ENBT |
| 1756-ENET |
| 1756-EWEB |
| 1756-HSC |
| 1756-IA16 |
| 1756-IA16I |
| 1756-IA32 |
| 1756-IB16 |
| 1756-IB16D |
| 1756-IB16I |
| 1756-IB32 |
| 1756-IF16 |
| 1756-IF16H |
| 1756-IF8 |
| 1756-IF8H |
| 1756-IF8I |
| 1756-IF6I |
| 1756-IF6CIS |
| 1756-IT6I |
| 1756-IR6I |
| 1756-IR12 |
| 1756-IRT8I |
| 1756-IT6I2 |
| 1756-IM16I |
| 1756-L61 |
| 1756-L62 |
| 1756-L63 |
| 1756-L64 |
| 1756-L65 |
| 1756-L71 |
| 1756-L71S |
| 1756-L72 |
| 1756-L72S |
| 1756-L73 |
| 1756-L74 |
| 1756-L75 |
| 1756-L81E |
| 1756-L81ES |
| 1756-L82E |
| 1756-L82ES |
| 1756-L83E |
| 1756-L83ES |
| 1756-L84E |
| 1756-L84ES |
| 1756-L85E |
| 1756-L8SP |
| 1756-M02AE |
| 1756-M02AS |
| 1756-M03SE |
| 1756-M08SE |
| 1756-M16SE |
| 1756-N2 |
| 1756-OA16 |
| 1756-OA16I |
| 1756-OB16D |
| 1756-OB16E |
| 1756-OB16I |
| 1756-OB32 |
| 1756-OF4 |
| 1756-OF8 |
| 1756-OF8I |
| 1756-OW16I |
| 1756-OF6VI |
| 1756-OF6CI |
| 1756-PA72 |
| 1756-PA75 |
| 1756-PA75R |
| 1756-PB72 |
| 1756-PB75 |
| 1756-RM |
| 1756-RM2 |
| 1756-TBCH |
| 1756-TBNH |
| 1756-TBS6H |
| 1756-TBSH |
| 1757-SRM |
| 1794-ACN15 |
| 1794-ACNR15 |
| 1794-ADN |
| 1794-AENT |
| 1794-AENTR |
| 1794-CE1 |
| 1794-CE3 |
| 1794-IA16 |
| 1794-IA8 |
| 1794-IA8I |
| 1794-IB10XOB6 |
| 1794-IB16 |
| 1794-IB16D |
| 1794-IB16XOB16P |
| 1794-IB32 |
| 1794-IB8 |
| 1794-IC16 |
| 1794-ID2 |
| 1794-IE12 |
| 1794-IE4XOE2 |
| 1794-IE8 |
| 1794-IE8H |
| 1794-IE8XOE4 |
| 1794-IF2XOF2I |
| 1794-IF4I |
| 1794-IG16 |
| 1794-IH16 |
| 1794-IJ2 |
| 1794-IM16 |
| 1794-IM8 |
| 1794-IP4 |
| 1794-IR8 |
| 1794-IRT8 |
| 1794-IT8 |
| 1794-IV16 |
| 1794-IV32 |
| 1794-OA16 |
| 1794-OA8 |
| 1794-OA8I |
| 1794-OB16 |
| 1794-OB16D |
| 1794-OB16P |
| 1794-OB32P |
| 1794-OB8 |
| 1794-OB8EP |
| 1794-OC16 |
| 1794-OE12 |
| 1794-OE4 |
| 1794-OE8H |
| 1794-OF4I |
| 1794-OF8IH |
| 1794-OM8 |
| 1794-OV16 |
| 1794-OV16P |
| 1794-OV32 |
| 1794-OW8 |
| 1794-PS13 |
| 1794-PS3 |
| 1794-TB2 |
| 1794-TB3 |
| 1794-TB32 |
| 1794-TB3G |
| 1794-TB3S |
| 1794-TBN |
| 1794-TBNF |
| 1794-VHSC |
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| 6SN1118-0DM23-0AA0 |
| 6SN1118-0DM33-0AA0 |
| 6SN1118-0NH00-0AA2 |
| 6SN1118-0NH11-0AA0 |
| 6SN1118-0NH10-0AA0 |
| 6SN1118-0NJ01-0AA0 |
| 6SN1118-0NK01-0AA0 |
| 6SN1121-0BA11-0AA0 |
| 6SN1121-0BA11-0AA1 |
| 6SN1121-0BA13-0AA0 |
| 6SN1121-0DA11-0AA0 |
| 6SN1121-0DA13-0AA0 |
| 6SN1122-0BA11-0AA0 |
| 6SN1122-0BA11-0AA1 |
| 6SN1122-0BA12-0AA0 |
| 6SN1123-1AA00-0AA0 |
| 6SN1123-1AA00-0AA1 |
| 6SN1123-1AA00-0BA1 |
| 6SN1123-1AA00-0CA0 |
| 6SN1123-1AA00-0CA1 |
| 6SN1123-1AA00-0DA0 |
| 6SN1123-1AA00-0DA1 |
| 6SN1123-1AA00-0EA1 |
| 6SN1123-1AA00-0FA0 |
| 6SN1123-1AA00-0GA0 |
| 6SN1123-1AA00-0HA0 |
| 6SN1123-1AA00-0HA1 |
| 6SN1123-1AA00-0JA0 |
| 6SN1124-1AB00-0BA0 |
| 6SN1124-1AB00-0CA0 |
| 6SN1128-1EA00-0CA0 |
| 6SN1130-1AA11-0AA0 |
| 6SN1130-1AA11-0CA0 |
| 6SN1130-1AA11-0DA0 |
| 6SN1130-1AA11-0EA0 |
| 6SN1130-1AA11-0FA0 |
| 6SN1130-1AA11-0GA0 |
| 6SN1130-1AA12-0AA0 |
| 6SN1130-1AA12-0CA0 |
| 6SN1130-1AA12-0DA0 |
| 6SN1130-1AA12-0EA0 |
| 6SN1130-1AA12-0FA0 |
| 6SN1130-1AA12-0GA0 |
| 6SN1130-1AD11-0AA0 |
| 6SN1130-1AD11-0BA0 |
| 6SN1130-1DA11-0AA0 |
| 6SN1130-1DA11-0DA0 |
| 6SN1130-1DA11-0EA0 |
| 6SN1130-1DA11-0FA0 |
| 6SN1130-1DA11-0HA0 |
| 6SN1130-1DA12-0AA0 |
| 6SN1130-1DA12-0BA0 |
| 6SN1130-1DA12-0CA0 |
| 6SN1130-1DA12-0DA0 |
| 6SN1130-1DA12-0HA0 |
| 6SN1130-1DA13-0AA0 |
| 6SN1130-1DA13-0BA0 |
| 6SN1130-1DA13-0CA0 |
| 6SN1130-1DA13-0DA0 |
| 6SN1130-1DA13-0EA0 |
| 6SN1130-1DG12-0HA0 |
| 6SN1130-1DG13-0AA0 |
| 6SN1130-1DG13-0BA0 |
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