453 trouble
Hello Folks, Ive trouble on my 453, I discover that AC voltage is running on chassis +/- 75V ......... I opened the main plug and the ground pin was unconnected. Does anyone experienced the same
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F4GNY
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#150460
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Re: 422 AC power socket
Funny coincidence as I was out in the garage yesterday and saw my hedge trimmer cord. 10 seconds with my pocket knife and I now have a 50' power cord! Thanks everyone for replying.
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johnasolecki@...
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#150459
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Re: 422 AC power socket
The non AC/DC version of a 422 needs the same kind of cord as most weed whackers n shit. I have had a few where I had to trim the edges a bit but they connect and they are safe. Some brands f them you
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Jeff Urban
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#150458
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Re: Concentric A and B time-base knobs/interlocking
That sort of imprecise clicking thing normally is easy to correct by loosening the B knob, carefully adjusting the angle of the knob against the A knob, fastening it and repeating if necessary. You do
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Raymond Domp Frank
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#150457
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Re: Concentric A and B time-base knobs/interlocking
You may be right about the assembly error, as the B time-base knob is a little imprecise in operation and doesn't seem to quite click into its detents cleanly. However, I have now checked both the A
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Colin Herbert
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#150456
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Re: Concentric A and B time-base knobs/interlocking
Hi Colin, Do you know if the time base speeds of A and B correspond to those indicated on the knobs? Did you try observing waveforms with both A and B? I'm thinking you may have made an assembly
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Raymond Domp Frank
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#150455
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Re: Concentric A and B time-base knobs/interlocking
Hi Raymond, I probably didn't express myself clearly enough. The situation with regard to the horizontal display buttons is this: 1) A is fine and does what it should. 2) MIX shows both time-bases,
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Colin Herbert
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#150454
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Re: Concentric A and B time-base knobs/interlocking
Colin, Not sure if I understand exactly what you mean: The "A" part of the trace (that's the part movable by the delay setting) is supposed to be intensified, not the "B" part. Are you sure "B ends A"
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Raymond Domp Frank
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#150453
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Re: Concentric A and B time-base knobs/interlocking
Hi, I removed both the Trig & Sweep Logic board and the Timing board. I could then remove the shielding covering the cams and the cam assemblies themselves carefully. I then extracted the appropriate
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Colin Herbert
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#150452
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Re: 464
A direct link for those interested. http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Tektronix --Toby
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toby@...
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#150451
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Re: 464
That would be the scan I made about 14 years ago and made available to this group: /g/TekScopes/message/7215 It then has spread to various sites for free download which is OK. But
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zenith5106
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#150450
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Re: 464
Roy it is also available on the KO4BB site as a clean PDF file down loaded it myself. they also have a lot of Tek manuals, the weekly pubs and tech notes too. Jim O
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v_12eng@...
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#150449
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Re: 464
Jon, I searched Tek Wiki web site: w140.com/tekwiki/ <http://w140.com/tekwiki/> And did not find this manual. Am I looking on the right place? Is there a direct link to it? Or to the page or list of
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Roy Morgan <k1lky68@...>
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#150448
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Re: Scope
For those curious what else is there: http://dennlec.com/buy/tektronix-manuals.html --Toby
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toby@...
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#150447
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Re: Scope
I think the nearest you'll get to schematics is what H?kan has published < http://www.hakanh.com/dl/kits.htm>. You'll some schematics for the 644A there, though ISTR there are significant differences
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Sigur?ur ?sgeirsson
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#150446
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Re: Scope
Tom, This is where I found mine. It is not a service manual in the traditional sense with schematics but it does have some useful information on removing boards and voltage test points. Despite the
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Roger Evans
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#150445
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Re: Scope
The clearest you will get is a service manual for TDS544A as I recall. None of the others have ever been released. Many of the sections are the same or similar though so it is still helpful. --Eric
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EricJ
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#150444
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Re: Scope
Hi Roger, Thanks for your email. Yes, it is a TDS 684A. I actually got it running yesterday, and it is working very well. I think it had been in the surplus place for a long time, and so it took a
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Thomas Dodge
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#150443
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Re: Scope
Tom, Do you mean a TDS 684A? I have one of these and it has serious problems with leaking of the SMD electrolytic capacitors on the acquisition board and subsequent corrosion. There are not too many
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Roger Evans
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#150442
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Re: 422 AC power socket
Just use a 30mm cord grip and solder a cable.
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Mike D
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#150441
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