onkyo808 中置輸出突然沒有聲

on_1020

想自己維修    有冇師兄教路

billymud

First of all, is the speaker working fine ?  how did u verify it ?

read the schematic diagram for more info before u DIY.
若果Rear_L, Real_R 兩channels冇事, 可知Ctr_channel 的功放管冇壞，(because common IProtect and VProtect circuits are provided for those channels.), then, 你去檢查有冇甩線或其他前端siganl path。

on_1020

billymud 發表於 2014-12-29 17:22
First of all, is the speaker working fine ?  how did u verify it ?

read the schematic diagram for m ...

中置喇叭都壞左   
(Post76 Android 手機版送出)

billymud

on_1020 發表於 2014-12-30 02:28
中置喇叭都壞左   
(Post76 Android 手機版送出)

Speaker burnt ??
1. measure if DC voltage is existed at the Amp Output terminals.
2. 壞左中置喇叭, replace it !   

on_1020

billymud 發表於 2014-12-30 22:41
Speaker burnt ??
1. measure if DC voltage is existed at the Amp Output terminals.
2. 壞 ...

用番前置輸出試   中置變左細聲低沈      amp中置冇輸出    睇睇下戲都搞到壞兩樣野
(Post76 Android 手機版送出)

billymud

on_1020 發表於 2014-12-31 08:55
用番前置輸出試   中置變左細聲低沈      amp中置冇輸出    睇睇下戲都搞到壞兩樣野
(Post76 Android 手 ...

中置變左細聲低沈 >>>燒左其中一隻單元？ the tweezer ?

amp中置冇輸出 >>>>>  先check amp中置 power section 有冇signal 輸入??

check if the resistor(s) >>> shorted? opened ?