Laurie,
Here is one group on yahoo, http://groups.yahoo.com/group/TekSco...guid=145910120
Another is the newsgroup, sci.electronics.repair, this group covers everything under the sun.
I would tell you were to look but the 465 is different than the 466. Mine were on the "interface board"
which is located on the bottom of the scope, they are pins with eyelets in the ends. Voltage should be marked
on the pcb next to the test point pin.
Richard WB8KRN


"Laurie Landry" wrote in message ...
Richard,
I believe that you are on target. I will try to find the TPs and verify
the voltages.
You mention Tek newsgroups. Can you tell me their location.
So far, they have eluded my searches.
Thank you very much for your suggestion.

Laurie

Richard,
Thanks for the info on the groups. Regarding the voltages, they all
check ok except the -8v is something like -7.78volts. Whether this is
enough to cause the problem, is doubtful. Going through the service manual,
there is more information than I thought at first glance. However, it calls
for a lot of reading and my old eyes tire very rapidly!
There was a 465 on ebay today, but I lost out. The 465 has a few less
thing that can go wrong. But I suppose that digging into the 466 will help
me learn a few things!
Again, Richard, thanks for the advice.

Laurie

"

Richard,
Thanks for the info on the groups. Regarding the voltages, they all
check ok except the -8v is something like -7.78volts. Whether this is
enough to cause the problem, is doubtful. Going through the service manual,
there is more information than I thought at first glance. However, it calls
for a lot of reading and my old eyes tire very rapidly!
There was a 465 on ebay today, but I lost out. The 465 has a few less
thing that can go wrong. But I suppose that digging into the 466 will help
me learn a few things!
Again, Richard, thanks for the advice.

Laurie

"

Rick & Joe,
Thanks for your suggestions, however, all of your mentioned items have
been checked, and I am quite confident that the problem lies inside the box.
I now have a 333 page service manual...that unfortunately is more oriented
towards callibration than troubleshooting...but may lead to some useful
information.

First thing I'd suggest checking on a scope of this vintage is the
power supply bypass capacitors. See if there's excessive AC ripple on
any of the DC supply lines - if so, one of the 'lytic capacitor cans
has probably dried out and gone high-Z. All sorts of interesting
symptoms can occur as a result.

Exact-replacement caps are likely to be impossible to find - you may
very well need to improvise, using a modern 'lytic of equal or greater
capacity and WVDC rating, and some creative wiring and mounting
arrangements to adapt the new cap(s) to the old pinouts.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

Rick & Joe,
Thanks for your suggestions, however, all of your mentioned items have
been checked, and I am quite confident that the problem lies inside the box.
I now have a 333 page service manual...that unfortunately is more oriented
towards callibration than troubleshooting...but may lead to some useful
information.

First thing I'd suggest checking on a scope of this vintage is the
power supply bypass capacitors. See if there's excessive AC ripple on
any of the DC supply lines - if so, one of the 'lytic capacitor cans
has probably dried out and gone high-Z. All sorts of interesting
symptoms can occur as a result.

Exact-replacement caps are likely to be impossible to find - you may
very well need to improvise, using a modern 'lytic of equal or greater
capacity and WVDC rating, and some creative wiring and mounting
arrangements to adapt the new cap(s) to the old pinouts.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!