Repair History /

Integra DTR-30.3 7.2 聲道綜合擴大機維修 (P0011)

Repair & maintain
Repair TitleIntegra DTR-30.3 7.2 聲道綜合擴大機維修
RSNP0011
StatusReturn
Maintain Date2019/01/17
Next Maintain2019/07/16
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Integra DTR-30.3 7.2 聲道綜合擴大機維修
Features
DateBrand/ModelWarranty
Audio equipmentIntegra
Integra DTR-30.3
Model : DTR-30.3
  • DLNA
  • 7.2 CH
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Repair History
DateContent
2019-01-18
上電後面板遙控器無法控制。

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。

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
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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