[Kenwood] TS-940S Cooling Fan Problem

[Walt Breining]

Bill:
You said that you tried it on another DC supply? Did it run ok or did it
still start slow?
If it still started slow, it probably is the fan.
If it starts ok on a good DC supply, there could be a problem with the
circuitry that powers the fan.

 Vy 73, Walt N9WB
Good audio is an Amateur Radio tradition, not a crime.

----- Original Message ----- 
From: "Bill Stewart" <bstewart at ipass.net>
To: "kenwood at mailman.qth.net" <Kenwood at mailman.qth.net>
Sent: Thursday, October 27, 2005 8:25 AM
Subject: [Kenwood] TS-940S Cooling Fan Problem


> I have a TS-940S, s/n 6040XXX, which has a sluggish cooling fan (on left,
facing front, behind the power trans.). Sometimes it will not start. I have
shot WD-40 in it and tried to get oil to go down the shaft but sometimes it
still won't start and if it does start, it turns slowly & erratically. I
measured the voltage to be around 18VDC with the fan disconnected and
connected, a fluctuating .5 to 1.5VDC with the erratic rotation.
> Questions: 1. Is this no-load to load voltage drop normal?
>                  2. Does the voltage and fan speed increase with temp.
rise?
>                  3. If the above is a problem, are there any mods. to
replace this fan or maybe make the fan run all the time?
> The fan runs ok if it gets beyond the low start-up point (on a seperate DC
supply).
> Any comments will be appreciated, thanks...Bill K4JYS
> ______________________________________________________________
>