擴音機有問題,喇叭出現爆音
本帖最後由 lamhoifung 於 2014-2-23 14:49 編輯有三個問題,想請教各位師兄。THX.
1,部AMP扭大細聲制時,右邊喇叭有雜音?
2,開機和關機,右邊喇叭會''仆''—聲?
3,有時聽聽下歌右邊喇叭又會''仆''—聲?
左右喇叭調轉test過,應該唔關喇叭事。之前未出現上述問題,係呢個月先後出現1>3>2問題。
上述問題係AMP邊part出問題?可否自己維修? 胆机? 本帖最後由 billymud 於 2014-3-30 05:24 編輯
1,部AMP扭大細聲制時,右邊喇叭有雜音>>possibly, volume control problem.need be replaced.
2,開機和關機,右邊喇叭會''仆''—聲>>check the speaker protection module.reset the delay time. (remark: some 胆机 doesn't equipped with the module. )
3,有時聽聽下歌右邊喇叭又會''仆''—聲>>capactor problem or volume control problem.
左右喇叭調轉test過,應該唔關喇叭事。之前未出現上述問題,係呢個月先後出現1>3>2問題>> possibly, component aging problem.
上述問題係AMP邊part出問題?可否自己維修?>> certainly, DIY-able, as commented ! billymud 發表於 2014-3-30 05:18 static/image/common/back.gif
1,部AMP扭大細聲制時,右邊喇叭有雜音>>possibly, volume control problem.need be replaced.
2,開機和 ...
已經換咗電位器和繼電器,問題依舊。AMP:cec amp-3800 本帖最後由 billymud 於 2014-3-30 15:20 編輯
lamhoifung 發表於 2014-3-30 06:12 static/image/common/back.gif
已經換咗電位器和繼電器,問題依舊。AMP:cec amp-3800
this one ? {:1_342:}
換咗繼電器,"'仆''—聲" 問題依舊, is the new relay activiated properly? ,"'仆聲" only happen randomly at R channel?
換咗電位器,"雜音 " 問題依舊, if "雜音 " only happen when u 扭大細聲, replace the Volume電位器 with a new one.
Otherwise, probably a tunning issue (ie. component thermo-shift) existed in this Class-A pwr-amp section.
good luck with ur DIY. {:1_351:} 換咗繼電器,"'仆''—聲" 問題依舊, is the new relay activiated properly? ,
YES
"'仆聲" only happen randomly at R channel?
換咗新電位器後,變咗左聲道有問題,右聲道又無事。
換咗電位器,"雜音 " 問題依舊, if "雜音 " only happen when u 扭大細聲, replace the Volume電位器 with a new one.
測試兩個全新都係有輕微雜音,比舊的好好多了。
Otherwise, probably a tunning issue (ie. component thermo-shift) existed in this Class-A pwr-amp section.
我懷疑開关制有問題。 隻牛回壓有問題
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