ABB3HAC020343-001 觸摸屏
維修經(jīng)驗總結(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(fù)位電路
1.待修電路板上有大規(guī)模集成電路時,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)機器試一試.以及多按幾次復(fù)
位鍵.
ABB3HAC020343-001 觸摸屏
| 3HAC021390-001 | 3HAC0236-1 |
| 3HAC021395-001 | 3HAC023618-004 |
| 3HAC021448-001 | 3HAC023621-001 |
| 3HAC021448-002 | 3HAC023621-003 |
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| 3HAC021593-001 | 3HAC023775-002 |
| 3HAC021594-001 | 3HAC023775-003 |
| 3HAC021594-003 | 3HAC023775-004 |
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| 3HAC021601-001 | 3HAC023775-006 |
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| 3HAC021606-001 | 3HAC023775-012 |
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ABB3HAC020343-001 觸摸屏
| 6SN1111-0AA00-0FA0 |
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ABB3HAC020343-001 觸摸屏
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