Joe: The ones that I have. One board is with the distplays on it has a
couple of regular caps. The other board is ceramic and it had all surface
mount parts. The ceramic board is the one that seems to always give me the
problems. Anyway give it a try.
rich

"RFI-EMI-GUY" wrote in message
...
Rich Klestinez wrote:
I used to work for a company (ARCO Oil) that used a bunch of those.
Weller closely guarded their schematics and even now they will not
release them. We sent them in for repair but they charged about as much
as to buy a new one. Here is what I found over fixing a dozen or so.
1) The wire nuts came loose inside
2) Intermittent wires in the cable going to the soldering iron. Flex the
cable while ohming end to end.
3) The surface mount electrolytics go bad. These were MOST of the
failures and I ended up changing all of them in the rest of the
25 irons we used over about 3 years.
4) The cheap temperature set wire wound pot gets worn out.

Most of the parts in this unit are consumer rated parts and are
available. Never had any problems with the ceramic boards in the units or
with the printed resistors on them. Had a couple of chips fail. It's an
A to D with a seven segment driver built in. They are available still.

Other than the above, they are really a darn good soldering iron and keep
the tip temperature regulated fairly closely.

I still have 2 of them so if you decide to throw them away, send them to
me and I can use them for parts to keep mine in repair. I will reimburse
you for your shipping.

I have more info If you need it.

Rich Klesstinez
3728 Crestline Rd
Fort Worth Tx 76107

Email:
(my name, lower case, no spaces) at charter (dot) net



"Ralph Mowery" wrote in message
...
"RFI-EMI-GUY" wrote in message
...
I have same model unit with same exact problem. Yest it does regulate
the temperature. I haven't figured out the display problem either and
the thermistor in the iron seems to "ohm out" properly. Let me know
what you find. I never could find schematics for it. I used it just
today on a PIC project. Shame to throw it out, but I would like to read
the temperature.

--
Joe Leikhim K4SAT
I found several schematics for different models. Never did find the one
that matches mine. I opened it up and it seems there is a ceramic board
with surface devices on it. Almost no user replicable parts. Atleast
for my skill level. I was hoping it would be the discrete parts. I can
work with them. Oh well, it was free and is a good soldering iron even
without the display. I do have a couple of spare parts for it also.

de KU4PT





Rich;
Since the temperature control on mine seems to be working can I assume the
variable pot, the Iron cable and the Iron thermistor are OK? Mine flashes
"EEE" on turn on and then the display goes blank. There are a number of
leaded capacitors on the display board (Mine is actually an older model
2002-A version). I will try "shotgunning" a;; of the capacitors with new
ones and keep you in mind for the disposal if I buy a replacement.

--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

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