OMG!!!
I surely hope you haven't followed any of these suggestions!
It is easy, loosen the nut, do not let the screw turn,
level the nut with the screw slot, tap it with a tiny
hammer, and it will fall off.
The screw is not threaded into the impeller. It is purely
there to pull the collet into a taper that is inside of the
impeller. The nut does the pulling.
DO NOT ALLOW THE SCREW TO TURN!!!
DO NOT yank, pull, or pry on the impeller.
-Chuck Harris
Bob Albert via Groups.Io wrote:
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If you can do it, perhaps gripping the fan motor shaft with a big pliers and wobbling the blade may help. Wobble it back and forth numerous times but never with much force.
I have a problem with the main tuning knob on my TS-940S. I can't undo the set screw. It seems to be bunged up and so far nothing has budged it. Luckily I have no need to remove it but still...
Bob
On Sunday, August 4, 2019, 09:14:38 PM PDT, n4buq <n4buq@...> wrote:
The fan was working - at least I'm pretty sure it was. Something in the PS began to smell of smoke so I'm pulling it to perform needed repair and maintenance work (mostly capacitor replacements).
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Tony Fleming" <czecht@...>
To: [email protected]
Sent: Sunday, August 4, 2019 10:17:23 PM
Subject: Re: [TekScopes] 2445 LVPS Issues
I did not remove mine, when fixing mine. It was little dusty so I used a
brush. It works, so I don't fix what isn't broken.... ha ha ha
BUT my memory isn't that good to remember if it is glued or some set-screw
- sorry.
Is your fan working?
On Sun, Aug 4, 2019 at 9:32 PM n4buq <n4buq@...> wrote:
I've already pulled on it harder than I was really comfortable doing;
however, the instructions state to use "firm pressure" to pull the fan
blade off.
I'm wondering if the slotted screw is intended to be used to push against
the motor shaft and push the fan blade off. If that were the case, though,
I'd think that would be in the instructions so I'm thinking that's not a
proper approach.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Tony Fleming" <czecht@...>
To: [email protected]
Sent: Sunday, August 4, 2019 7:44:33 PM
Subject: Re: [TekScopes] 2445 LVPS Issues
They are VERY FRAGILE! Do not apply much pressure or it just brakes.
I don't know how to remove it without braking it, sorry!
On Sun, Aug 4, 2019 at 7:13 PM n4buq <n4buq@...> wrote:
Got everything removed except the fan. Any hints/tricks to getting
that
off? Loosened the nut but the fan blade won't budge and I don't want
to
pull any harder unless it is recommended. I have a feeling that's some
kind of collet and perhaps pressure on the slotted screw would release
it
but just don't know.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Barry" <n4buq@...>
To: [email protected]
Sent: Saturday, August 3, 2019 9:30:54 PM
Subject: Re: [TekScopes] 2445 LVPS Issues
And there, on page 6-25, is the complete process spelled out very
neatly.
Just didn't expect that.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "n4buq" <n4buq@...>
To: [email protected]
Sent: Saturday, August 3, 2019 9:03:44 PM
Subject: Re: [TekScopes] 2445 LVPS Issues
I didn't realize the SM would go into detail on board removal. I
will
read
up on it there.
Thanks for the tip on the incorrect silkscreen too.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Tom Gardner" <tggzzz@...>
To: [email protected]
Sent: Saturday, August 3, 2019 7:10:03 PM
Subject: Re: [TekScopes] 2445 LVPS Issues
The service manual is quite specific on how to remove the various
boards.
It
isn't difficult, if follow instructions.
The manual is available at the usual places, e.g. tekwiki.
Be aware that on some of the 24x5* series the manual and silk
screen
show
two
caps swapped. So when recapping, remove and replace a single
capacitor
before
moving on to the next; don't remove them all and then start
replacing
them.
On 04/08/19 00:13, n4buq wrote:
I was using my 2445 today when I heard a strange sort of thump
noise
coming
from inside the scope after which I started smelling a burning
odor. I
had a few pieces of gear powered up at the time but quickly
could
tell
the
smell was coming from the 2445.
I took off the case and top cover and pretty sure the smell is
coming
from
the LVPS board(s) but am a bit stumped at how to get those two
boards
out.
I'm pretty sure the top ribbon cable needs to come off but
don't
quite
see how to get the large plastic cover off of the area where
the
main
filter caps are.
Looking at some of the smaller caps, they appear to be leaning
due
to
(I'm
guessing) bulging at the circuit board end but not sure exactly
what
overheated (or, possibly, made that thumping noise).
Are there instructions somewhere that outline how to remove
those
boards?
If not, could someone provide a couple of hints to get me
started?
Thanks,
Barry - N4BUQ
