KM-5035 intermittent loud hissing or fan noise ?

[CCS]

I still have a few of these machines out that I picked up service on, sometimes have intermittent loud hissing and/or fan noise from rear, due to time I have not dug into yet. Sounds almost like power supply hissing or fans going crazy, I'm sure some of you have come across this, when I get time to go back what should I look for on this problem? Thanks.

[Tonerkiller]

Re: KM-5035 intermittent loud hissing or fan noise ?

I have replaced fans on these models before.

[MR Bill]

Re: KM-5035 intermittent loud hissing or fan noise ?

Ya, sounds like a bearing in the fan going out? Make sure you clean any filters. The fan behind the bypass tray gets that filter plugged with dust all the time. If not cleaned your drum will COOK.

[CraiginAK]

Re: KM-5035 intermittent loud hissing or fan noise ?

Over last year or so been replacing lots of noisy power supply fans, first thing we usually check when get call for fan type noise.

[CCS]

Re: KM-5035 intermittent loud hissing or fan noise ?

OK, thanks guys