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處理器 1790D-N4C0
維修技巧之
維修經(jīng)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(jīng)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(guī)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.
處理器 1790D-N4C0
| 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 |
| 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 |
| CACR-SR03BB1CS |
| CACR-SR03BB1ES |
| CACR-SR03BB1HS |
| CACR-SR03BC1AM |
| CACR-SR03BC1ES |
| CACR-SR03BE12M |
| CACR-SR03SB1AF |
| CACR-SR03SB1BF |
| CACR-SR03SZ1SS |
| CACR-SR03TB5BM |
| CACR-SR03TZ0SM |
| CACR-SR03TZ6SF |
| CACR-SR03TZ6SS |
| CACR-SR05AA2AH |
| CACR-SR05AB1ER |
| CACR-SR05AC1ER |
| CACR-SR05AY1SR |
| CACR-SR05BA1AM |
| CACR-SR05BB1AF |
| CACR-SR05BB1AM |
| CACR-SR05BB1BF |
| CACR-SR05BB1BS |
| CACR-SR05BB1ES |
| CACR-SR05BC1ES |
| CACR-SR05BZ1SF |
| CACR-SR05BZ1SS |
| CACR-SR05SB1AF |
| CACR-SR05SB1BF |
| CACR-SR05SZ1SS |
| CACR-SR06TZ6SM |
| CACR-SR07AC1CS |
| CACR-SR07AC1ER |
| CACR-SR07AC1ES |
| CACR-SR07BB1AM |
| CACR-SR07BZ1SM |
| CACR-SR09TZ0SF |
| CACR-SR09TZ6SF |
| CACR-SR10BY1SG |
| CACR-SR10BZ1SF |
| CACR-SR10SB1BF |
| CACR-SR10SB1DF |
| CACR-SR12TB5BM |
| CACR-SR12TB6AF |
| CACR-SR12TZ6SF |
| CACR-SR12TZ6SM |
| CACR-SR15BA1AF |
| CACR-SR15BB1AM |
| CACR-SR15BB1BF |
| CACR-SR15BB1BM |
| CACR-SR15BB1CS |
| CACR-SR15BB1ES |
| CACR-SR15BC1AF |
