Re: Zenith 36" problem!
Taylor, George,
Thank-you. This is greatly appreciated. I do have a question. I
didn't find a troubleshooting guide. Is there one buried in there
someplace? And a very big thanks to everyone
By
Richard R. Pope
·
#112030
·
|
Re: Zenith 36" problem!
Did you try Talon Electronics? I get FREE yes FREE pdf service manuals from them, just for asking. George is the old timer there - be sure you put that in the contact form. I got an LG LCD manual
By
taylorvandy
·
#112029
·
|
Re: Tek 465B woes
Thanks Mark. I ended up using a 470 uF cap rated at 250 volts. Turns out I
didn't need to perform the technique after all. In my haste checking
voltages, I missed the mV designation on my DMM. Looks
By
Kevin Crossett <kcrossett@...>
·
#112028
·
|
Re: Tek 465B woes
Yeah, I'm pleased that the voltages are OK. I will begin checking the
connections over the weekend, but I will have trouble with the transistors.
I know some scopes use sockets for the transistors,
By
Kevin Crossett <kcrossett@...>
·
#112027
·
|
Re: Tek 465B woes
You can also use a higher voltage cap too. Won't matter a bit. Just don't go lower.
Mark
By
Mark Wendt <mark.wendt.ctr@...>
·
#112026
·
|
Re: Tek 465B woes
Well, the good news is that it seems you won't have to replace one or more of the large el. caps.
If you're now certain about the voltages you reported, I'd say the power supply voltages are good
By
raymonddf@...
·
#112025
·
|
Re: Tek 465B woes
OK, so this is kind of embarrassing. Turns out the 15 v I said I saw last
night on the 110 v rail, was actually 15 mV. Sucks getting old. I hooked
up a 470 uF 250 v cap that I pulled out of an old
By
Kevin Crossett <kcrossett@...>
·
#112024
·
|
Re: 7623A PI stuck
Is there another plugin next to the stuck one ?Sometimes, if a PI side panel is not installed correctly, the front edge can get caught on an adjacent plugin, or on the left edge of the
By
HankC, Boston, WA1HOS
·
#112023
·
|
Re: Batteries in 7S14 plug-in
Cavid:
Thanks; that worked great!
Mike N4MWP
wrote:
[Non-text portions of this message have been removed]
By
Mike Dinolfo
·
#112022
·
|
Re: Batteries in 7S14 plug-in
https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/96664
https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/112514
By
David DiGiacomo
·
#112021
·
|
Tek 11801 NVRAM
Dear all!
I replaced the batteries BT150 (A18 Memory Board) and BT130 (A14 I/O
Board) on my 11801C.
Because the fact, that the NVRAM is completely cleared, the scope lost
also its ID#. Is there a
By
Simon
·
#112020
·
|
Re: Light bulbs for A8 scale illumination pcb of 2445A?
One more. This is what I order finally. Available at no extra shipping cost in Europe also.
By
Panos
·
#112019
·
|
Re: Batteries in 7S14 plug-in
In connection with the concept of using the LH1262 (or similar) device,
I have two questions for the group members:
1. To implement the "regulation" suggested by raymonddf, applied to the
use of an
By
Mike Dinolfo
·
#112018
·
|
Re: Tek 465B woes
Thanks for the insight Paul. I am familiar with parts removal, and would
probably have determined the best course of action would be destroying the
cap and removing the individual legs one at ta time.
By
Kevin Crossett <kcrossett@...>
·
#112017
·
|
Re: Tek 465B woes
If you can't get to that file, I think I have a copy around that I could
mail you. It's a good writeup.
The big fun comes in replacing the cap. The PCB is easy to damage. It's
probably easiest to
By
Paul Amaranth
·
#112016
·
|
Re: Batteries in 7S14 plug-in
Raymond:
Thanx for all the info. When it's working properly, the 7S14 is a sweet
plug-in.
I also wish there were more retired Tektronix engineers who would do repair
and calibration of old Tek
By
Gary Robert Bosworth
·
#112015
·
|
Re: 7B80 not quite right
So now it seems to be just fine. Last night I fired it up and it still had the problem. Then I took it out and poked around in the circuitry looking for anything suspicious, jiggling stuff around some
By
Ed Breya
·
#112014
·
|
Re: Tek 465B woes
There is a file in the files section called Tek 465 Power Supply Capacitor Replacement Guide.pdf that might help you find what you need. Since the yahoo boobs went to neo, I am unable to open the
By
Tom Miller
·
#112013
·
|
Re: Tek 465B woes
Thanks Mike. I think I'm thinking too hard about this. That makes obvious
sense.
Cheers
Kevin
KN4M
TekScopes@...> wrote:
By
Kevin Crossett <kcrossett@...>
·
#112012
·
|
Re: Tek 465B woes
Use you dmm on the existing capacitor to verify the correct polarity
BEFORE attaching added capacitor.
Mike N2LYM
By
Mike Santas
·
#112011
·
|