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Yamaha Manuals
Controller
AFC1
Service manual
Yamaha AFC1 Service Manual page 68
Active field controller
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Contents
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4.〈CN2 -5V系出力異常の場合〉
手順
測定項目
(1)
電源スイッチON
(2)
出力電圧確認
電圧が出ていない
(3)
入力発振波形確認
波形異常
PFC回路電圧確認
(4)
波形確認
電圧が出ていない
波形異常
PFCコントロ−ラ−
(5)
入力電圧確認
波形確認
電圧が出ていない
波形異常
(6)
AC入力電圧確認
電圧が出ていない
確認内容
・AC入力
・DC−4.5V〜−5.5Vに入っているか
(ダミ−負荷ありの状態)
測定ポイント:回路図2/2『Point L』
電圧が出ている
・波形測定:回路図2/2『Point M』
(波形サンプルfig.6参照*6)
波形正常
・DC+370V〜+400Vに入っているか
測定ポイント:回路図1/2『Point A』
・波形測定:回路図1/2『Point B』
(波形サンプルfig.1参照*1)
電圧が出ている
波形正常
・DC+16V〜+19Vに入っているか
測定ポイント:回路図1/2『Point C』
・波形測定:回路図1/2『Point D』
(波形サンプルfig2参照*2)
電圧が出ている
波形正常
・AC入力電圧が出ているか
測定ポイント:回路図1/2『Point E』
電圧が出ている
修理内容
異常なし
IC7,D20
以上交換
IC1,IC2,Q3,Q4
R14,R16,PR4
以上交換
IC3,Q2,D3,ZD2,R4
以上交換
F1,Q1,ZD1,R3
以上交換
ACハ−ネスの
差込確認
AFC1
13
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Chapters
日本語
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English
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