Tek 2467B very nice, with problems.

Gyuri · 15th March 2012, 03:21 PM

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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audiomik · 16th March 2012, 03:39 PM

You might try the Tektronix Forum?
Tektronix Forum • View forum - Oscilloscope Technical Support

Mik

Gyuri · 16th March 2012, 03:58 PM

Thank you. I will try it.

Gyuri

flg · 16th March 2012, 04:25 PM

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...

Gyuri · 22nd March 2012, 08:33 AM

I can wait.

Gyuri · 7th April 2012, 06:48 PM

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!

gootee · 7th April 2012, 08:27 PM

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.

Gyuri · 7th April 2012, 08:37 PM

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.

Gyuri · 7th April 2012, 09:22 PM

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.

gootee · 8th April 2012, 03:44 AM

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

16th March 2012, 03:58 PM	#3
Gyuri diyAudio Member Join Date: Nov 2003 Location: Budapest	Thank you. I will try it. Gyuri __________________ Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat

16th March 2012, 04:25 PM	#4
flg diyAudio Member Join Date: Jul 2005 Location: North East	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... __________________ “Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” Dr. Seuss

22nd March 2012, 08:33 AM	#5
Gyuri diyAudio Member Join Date: Nov 2003 Location: Budapest	I can wait. __________________ Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat

7th April 2012, 06:48 PM	#6
Gyuri diyAudio Member Join Date: Nov 2003 Location: Budapest	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! __________________ Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat

7th April 2012, 08:37 PM	#8
Gyuri diyAudio Member Join Date: Nov 2003 Location: Budapest	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. __________________ Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat


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16th March 2012, 03:39 PM	#2
audiomik diyAudio Member Join Date: Apr 2010 Location: Bath, UK	You might try the Tektronix Forum? Tektronix Forum • View forum - Oscilloscope Technical Support Mik

7th April 2012, 08:27 PM	#7
gootee diyAudio Member Join Date: Nov 2006 Location: Indiana Blog Entries: 1	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.

7th April 2012, 09:22 PM	#9
Gyuri diyAudio Member Join Date: Nov 2003 Location: Budapest	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. __________________ Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat

8th April 2012, 03:44 AM	#10
gootee diyAudio Member Join Date: Nov 2006 Location: Indiana Blog Entries: 1	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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