1、先外(wai)(wai)部(bu)，后內(nei)部(bu)。不(bu)要(yao)動(dong)不(bu)動(dong)就打開(kai)機殼，沒有(you)(you)初(chu)步的判斷和排除(chu)就喜歡鋪(pu)開(kai)攤子，指望(wang)打開(kai)機殼看哪里(li)有(you)(you)斷線或(huo)明顯故(gu)障(zhang)(zhang)之(zhi)處,純粹是(shi)在(zai)碰運(yun)氣(qi)，即(ji)使好運(yun)也不(bu)可能每次都(dou)這樣。約有(you)(you)50%故(gu)障(zhang)(zhang)是(shi)由外(wai)(wai)部(bu)環(huan)境或(huo)操作、清(qing)潔等造成(cheng)的。如是(shi)否(fou)(fou)關機時間長(chang)了(le)？晝夜溫(wen)差是(shi)否(fou)(fou)很大？儀(yi)(yi)器(qi)放置的位置是(shi)否(fou)(fou)離電梯間很近? 儀(yi)(yi)器(qi)附近還有(you)(you)什么儀(yi)(yi)器(qi)在(zai)使用？計(ji)算機設(she)置是(shi)否(fou)(fou)正確？等等。

1. First external, then internal. Don't open the casing at any moment. If you don't have a preliminary judgment and troubleshooting, you like to spread out the situation. Relying on opening the casing to see where there are broken wires or obvious faults is purely a stroke of luck. Even good luck cannot always be like this. About 50% of malfunctions are caused by external environments, operations, cleaning, etc. Is the shutdown time too long? Is there a significant temperature difference between day and night? Is the instrument placed close to the elevator? What other instruments are in use near the instruments? Is the computer settings correct? Wait a minute.

2、先電(dian)源，后(hou)(hou)主機；先附件(jian)，后(hou)(hou)主機。應先檢查電(dian)源是(shi)(shi)否穩定、負載是(shi)(shi)否過(guo)重(zhong)、地線是(shi)(shi)否良好、電(dian)極(ji)等附件(jian)是(shi)(shi)否良好和正常、各接口是(shi)(shi)否正確等。

2. Power supply first, then host; First the attachment, then the host. It is necessary to first check whether the power supply is stable, whether the load is too heavy, whether the ground wire is in good condition, whether the electrodes and other accessories are in good and normal condition, and whether all interfaces are correct.

3、充分利(li)用儀器面板上各種按(an)鍵、顯(xian)示屏(ping)幕(mu)和操作 或(huo)維修程序等。

3. Make full use of various buttons, display screens, and operation or maintenance programs on the instrument panel.

4、了(le)解(jie)用戶的(de)(de)操作(zuo)習慣(guan)、操作(zuo)人員結(jie)構(gou)和水平，科室經濟情況等也會對維修有很大幫助。如(ru)可推(tui)斷清潔(jie)保養的(de)(de)如(ru)何，是否有欲(yu)更新(xin)的(de)(de)想法。

4. Understanding the user's operating habits, the structure and level of operators, and the economic situation of the department can also be of great help in maintenance. If it can be inferred how the cleaning and maintenance are going, do you have any ideas for updates.

5、不(bu)輕易(yi)更(geng)換原來(lai)儀器(qi)上的元器(qi)件和板子、管道等(deng)，因為有些元器(qi)件與板子、軟件數據相關(guan)。更(geng)不(bu)能靠不(bu)停(ting)地(di)換板子和部件來(lai)縮小故障源。

5. It is not easy to replace the original components, boards, pipelines, etc. on the instrument, as some components are related to board and software data. We cannot reduce the source of faults by constantly replacing boards and components.