Marantz SR6007 si-si 聲

xpk

部機用左唔夠兩年，最近發現佢STANDBY時會有SI－SI聲，POWERON就無事。唔係大聲不過好煩擾。係咪要入廠？有無得自己攪？

billymud

STANDBY時會有SI-SI聲， POWERON就無事, it's likey the oscillation noise induced by the (power) transformer 。(or  可能mounting screw鬆掉了??)
remark: "POWERON就無事" ?  --- what do u mean ?
           u mean the SR6007 can be power on without problem ?
        or, u mean  no more the si-si聲 after the POWERON ?
No way to DIY, unless it's just a case of  mounting screw 鬆掉了.    Either 入廠 to replace the transformer, or let it be.   

STANDBY時會有si-si細細聲，另一極大原因係standby section既 (switching?) 火牛發震 (i.e. harmonic noise of the switching frequency)所致。師兄可以細心檢查它的機械結構有冇鬆 (e.g.浸漬不良。)。if it's the root cause, 換之可也。DIY冇計了。

xpk

billymud 發表於 2015-1-4 09:52
STANDBY時會有 si-si 聲， POWERON就無事, it's likey the oscillation noise induced by the (power) tran ...

thanks Billy.

gikifk

billymud 發表於 2015-1-4 09:52
STANDBY時會有SI-SI聲， POWERON就無事, it's likey the oscillation noise induced by the (power) transf ...

師兄你好

xpk

power on之後就無聲了，應該真係隻standby牛，D聲都似switching牛老化聲。