Jaby Group Technology.
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跑步機電路維修 (P0036)
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Repair Title
跑步機電路維修
RSN
P0036
Status
Return
Maintain Date
2021/04/19
Next Maintain
2021/10/16
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Repair History
Date
Content
2021-04-19
Issue
跑步機電路維修,共兩台,小台為A,大台為B,皆可過電但沒有作動反應。
Analysis
A曾因控制面板按鍵維修過,但沒有到位,馬達驅動的部份沒有反應。B電源板正常,控制面板的按鍵信訊有問題,導至無法接受控制信訊。
Repair
A部份,修改控制面板的所有石墨按鍵,改為易更換的微動開關,為配合與按鍵的間隙,削除了部份按鍵高度,處理後可正常控制;馬達的部份循著 5V 的速度回饋信號往回找,找到了訊號的保護電路元件失效短路,導至信號接地,更換元件後正常。
B部份,主控採用 EM78 單晶片,採用掃描式按鍵,為確保測試正確,拆下所有的按鍵,單個安裝新的按鍵也沒有反應,懷疑是按鍵埠故障,後來測接腳波形是有的,於是沿電路再查一次,發現電路板的設計,很多關鍵位置是透過按鍵的內部引腳,所以只要某一按鍵故障,就會全部失效,所以更換所有按鍵後正常。
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