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Repair History
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Integra DTR-30.3 7.2 聲道綜合擴大機維修 (P0011)
Repair & maintain
Repair Title
Integra DTR-30.3 7.2 聲道綜合擴大機維修
RSN
P0011
Status
Return
Maintain Date
2019/01/17
Next Maintain
2019/07/16
Gallery
Features
Date
Brand/Model
Warranty
Audio equipment
Integra
Integra DTR-30.3
Model : DTR-30.3
DLNA
7.2 CH
--
Repair History
Date
Content
2019-01-18
Issue
上電後面板遙控器無法控制。
Analysis
數位音效晶片 PCM1690 遭貫穿,以致 VDD (3.3v) 與接地 (DGND) 短路,電壓不足進而導至控制面板輸出電位不足所以無法判定操作。
Repair
移除晶片的 VDD 腳位後檢修週邊零件是否遭波及,開機後可正常操作,音響在 Direct 模式(直接繞過音效晶片輸出)下可正常使用, HDMI 輸出也正常,目前運作測試中,待更換音效晶片。;修改電路讓風扇開機後立即啟動(因聲道電晶體在開機後溫度會上昇,有熱氣感)。
2019-03-11
Repair
PCM1690 晶片更換後所有聲道可正常輸出音聲,並更換部份有問題的面板控制按鍵,但發現數位音頻訊號會有些微雜音,判定可能有波及到主機板上的音訊處理晶片,待後續處理。
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