Tek 2467B very nice, with problems. - diyAudio
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Old 15th March 2012, 03:21 PM   #1
Gyuri is offline Gyuri  Hungary
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Default Tek 2467B very nice, with problems.

My best wishes to all of you, on our National Day!

I bought a Tek 2467B oscilloscope.
This probably was not a wise decision.
But wise are on the other side.
This is in a very nice cosmetic condition, but with minor problems.
I would like to fix this problems.
But i'm need help for this.
I don't like worsen this problems, with more imbecility.
So is there anybody who is willing helping me?

Best Regards,

Gyuri

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Old 16th March 2012, 03:39 PM   #2
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You might try the Tektronix Forum?
Tektronix Forum • View forum - Oscilloscope Technical Support

Mik
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Old 16th March 2012, 03:58 PM   #3
Gyuri is offline Gyuri  Hungary
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Thank you. I will try it.

Gyuri
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Old 16th March 2012, 04:25 PM   #4
flg is offline flg  United States
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I would expect there to be a few experienced techs step up soon. We have a few here. I have a 2465B(I think) looks similar but you have a few more buttons...
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Old 22nd March 2012, 08:33 AM   #5
Gyuri is offline Gyuri  Hungary
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I can wait.
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Old 7th April 2012, 06:48 PM   #6
Gyuri is offline Gyuri  Hungary
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The Easter is here already.
But unfortunately, nobody, you don't asked even it what's your problem with this apparatus?
Neither here, neither at Tekforum.

It is true, where is still Christmas!
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Old 7th April 2012, 08:27 PM   #7
gootee is offline gootee  United States
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Why didn't you say what the problem is? What is the problem?

I have repaired a few 2465-series scopes, a long time ago, and still have mine.

Probably your best bet, by far, will be the TekScopes discussion group, at yahoogroups.com.
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Old 7th April 2012, 08:37 PM   #8
Gyuri is offline Gyuri  Hungary
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Because I can not understand English and electronics.
So this is a difficult task for me.
But if there is a chance to see that someone can help me, I'll try.
Here is begins the thing:
TEST 02 FAIL 04
I know this is calibration problem.
But around here ends my knowledge.
I have the service book, easily 500 + pages in English.
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Old 7th April 2012, 09:22 PM   #9
Gyuri is offline Gyuri  Hungary
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If you think I'll try to describe my experience, this can really only be calibrated, I do not know.
But an appropriate (and quite expensive) instrumentation that is not possible without
Although I think the majority of the settings are right.
The vertical settings are definitely a problem.
By changing the voltage limit settings, the beams moved vertically.

What is interesting, and certainly means something:
5V/div, 0.5V/div, 50mV/div position is the same place,
this is true here:
(but these are another positions, than at above settings.)
2V/div, 0.2V/div, 20mV/div position is the same place,
and here:
(but these are another positions, than at above two settings.)
1V/div, 0.1V/div, 10mV/div position is the same place.
At 2mV/div setting the beams I can not move to the screen.
Precisely, the CH1 beam appears at the bottom of screen, but CH2 don't.

Now that's it.
This is me now I need to rest.
Thanks.

Gyuri

P.S.:
Perhaps you managed to understand something about it.
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Old 8th April 2012, 03:44 AM   #10
gootee is offline gootee  United States
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That sounds very hopeful, actually. At least it doesn't sound like the unobtainable input(?) chip is fried.

In my 2465, and some other 2400-series scopes, the calibration constants are all stored in an "NVRAM" (Non-Volatile RAM). But that NVRAM needs a BATTERY, to stay alive. Perhaps your battery just needs to be replaced.

For the re-calibration, you probably only need DC reference voltages and a timing reference (like a pulse generator). It's an easier and much shorter process than with the older Tek scopes.

Do you have the calibration procedure? You can substitute different test equipment, and can "fake" parts of it with lesser equipment, just to get it running.

In my 2465, the battery is on the top of the top circuit board, under the top cover. It's like a large silver disc-shaped wristwatch battery. I believe it's a commonly-available type.

Cheers,

Tom
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