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Re: 2465b possibly really stupid question (noob)
The discussion reminds me that the main oxidation remover in Brasso is ammonia. I have never tried ammonia to clean contacts but am wondering if it might work. It would leave no residue but spraying
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The discussion reminds me that the main oxidation remover in Brasso is ammonia. I have never tried ammonia to clean contacts but am wondering if it might work. It would leave no residue but spraying
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By
Richard Knoppow
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#166988
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Re: 2465b possibly really stupid question (noob)
"Brasso IS quite abrasive, has Kaolin and crystalline silica in it."
Thank you.
Brasso is multi-use, and application methods are quite different when cleaning Tek contacts, as opposed to cleaning
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"Brasso IS quite abrasive, has Kaolin and crystalline silica in it."
Thank you.
Brasso is multi-use, and application methods are quite different when cleaning Tek contacts, as opposed to cleaning
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By
M Yachad
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#166987
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Re: Anyone interested a addon plugin that enable you to use 7000 plugins on modern digital scope
Since somewhat related, I'll note a reference here from this EEVBlog "the 'best' tektronics 7000 series plugin scope" message thread and later comments regarding the Oregon Analog Tools ASM7 (
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Since somewhat related, I'll note a reference here from this EEVBlog "the 'best' tektronics 7000 series plugin scope" message thread and later comments regarding the Oregon Analog Tools ASM7 (
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By
nonIonizing EMF
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#166986
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Re: Tek extenders
I heard from Corey Williams, aka coreydeals,and got a bunch of photos. He's got quite a range of extenders, though I don't know how many of each nor do I recognize what they are for. He sent me
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I heard from Corey Williams, aka coreydeals,and got a bunch of photos. He's got quite a range of extenders, though I don't know how many of each nor do I recognize what they are for. He sent me
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By
Reginald Beardsley
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#166985
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Re: 7854 Bad display board
Grounding TP1200-1 should be safe -- that's what the 067-0911-00
diaganostic interface does. The CPU requires the _RESET line
to be held low for at least 3 clock cycles, so you may need to use
a
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Grounding TP1200-1 should be safe -- that's what the 067-0911-00
diaganostic interface does. The CPU requires the _RESET line
to be held low for at least 3 clock cycles, so you may need to use
a
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By
Dan G
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#166984
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Re: 7854 Bad display board
yep - you called it! Old ROMs in, all lights on. Haven't broken out the LA yet, but scoped the test points on the ROM board, and am seeing activity on the chip select test points. It's clearly in a
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yep - you called it! Old ROMs in, all lights on. Haven't broken out the LA yet, but scoped the test points on the ROM board, and am seeing activity on the chip select test points. It's clearly in a
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By
Paul
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#166983
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Re: 2465b possibly really stupid question (noob)
Thank you for that description Chuck.
My 2465A has just started doing the same thing as the OP's.
Hopefully the "A" version is pretty much the same as you described.
I spent some good time doing a
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Thank you for that description Chuck.
My 2465A has just started doing the same thing as the OP's.
Hopefully the "A" version is pretty much the same as you described.
I spent some good time doing a
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By
Polaraligned
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#166982
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Re: 2465b possibly really stupid question (noob)
To Rick (fellow Aussie): thanks for you reply and offer of help. I have an original service manual and I'm reasonably confident that I can sus them out with that. I take your point about replacing
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To Rick (fellow Aussie): thanks for you reply and offer of help. I have an original service manual and I'm reasonably confident that I can sus them out with that. I take your point about replacing
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By
VK1GVC
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#166981
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Re: TEK 5054 CPU Fan
Update: 120gb SSD Installed and imaged and working. Pentium 4 2.8GHz
installed and new heat sink and fan and two 1GB memory strips. The TDS5054
is working great now (and fast boot). I have
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Update: 120gb SSD Installed and imaged and working. Pentium 4 2.8GHz
installed and new heat sink and fan and two 1GB memory strips. The TDS5054
is working great now (and fast boot). I have
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By
David Kuhn
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#166980
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Re: 7854 Bad display board
That is a somewhat surprising result, given that the RTC self-test takes only
a small number of fairly linear CPU instructions after the ROM test, and,
with J1306 removed, cannot jump to any code that
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That is a somewhat surprising result, given that the RTC self-test takes only
a small number of fairly linear CPU instructions after the ROM test, and,
with J1306 removed, cannot jump to any code that
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By
Dan G
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#166979
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Re: 2465b possibly really stupid question (noob)
yahoo.com@groups.io> wrote:
Works for me - maybe you need to log into groups.io?
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yahoo.com@groups.io> wrote:
Works for me - maybe you need to log into groups.io?
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By
Siggi
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#166978
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Tek 2215 unstable trace on channel 1
I recently bought a 2215 that was working pretty well although the previous owner told me about an issue with dirty switches/pots.
That problem just started to act up last week: what used to be a
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I recently bought a 2215 that was working pretty well although the previous owner told me about an issue with dirty switches/pots.
That problem just started to act up last week: what used to be a
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By
ridderg@...
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#166977
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Re: 2465b possibly really stupid question (noob)
The only way I service the attenuators is a pain in the butt.
First you have to remove the knobs from below the CRT. I use
a pair of needle nosed pliers as a pry bar against the bezel
edge of the
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The only way I service the attenuators is a pain in the butt.
First you have to remove the knobs from below the CRT. I use
a pair of needle nosed pliers as a pry bar against the bezel
edge of the
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By
Chuck Harris
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#166976
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Re: 2465b possibly really stupid question (noob)
Agreed here. I would not recommend Brasso on the Tek 24XX attenuators, use it for cutlery and pots/pans.
It has abrasive materials, petroleum distillates and Ammonia (presumably in water).
Tek warns
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Agreed here. I would not recommend Brasso on the Tek 24XX attenuators, use it for cutlery and pots/pans.
It has abrasive materials, petroleum distillates and Ammonia (presumably in water).
Tek warns
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By
victor.silva
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#166975
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Re: 2465b possibly really stupid question (noob)
So of what I understand all my problems must be coming from the A11 Attenuator board. And said board is accessible from the bottom?
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So of what I understand all my problems must be coming from the A11 Attenuator board. And said board is accessible from the bottom?
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By
James Theonas
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#166974
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Re: 2465b possibly really stupid question (noob)
Ok. I will keep that in mind and I believe you are probably right. I'm just trying to gather as much information as I can before going forward with disassembly...
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Ok. I will keep that in mind and I believe you are probably right. I'm just trying to gather as much information as I can before going forward with disassembly...
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By
James Theonas
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#166973
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Re: Tek extenders
OK, I've not heard from Corey, so I sent him this message. I'll post if/when I hear from
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OK, I've not heard from Corey, so I sent him this message. I'll post if/when I hear from
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By
Reginald Beardsley
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#166972
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Re: Tektronix 465M - only scale illumination
BTW, if you have a frequency counter (maybe your DMM has that function), you might look at the points where waveforms #58, #59, or #60 are supposed to exist to see if the oscillator is oscillating
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BTW, if you have a frequency counter (maybe your DMM has that function), you might look at the points where waveforms #58, #59, or #60 are supposed to exist to see if the oscillator is oscillating
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By
n4buq
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#166971
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Re: 2465b possibly really stupid question (noob)
Not to be too pedantic, but the capacitor's physical state is not
what you were supposed to get out of Siggi's helpful description.
The capacitor is 99% likely to be just fine. It is a very
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Not to be too pedantic, but the capacitor's physical state is not
what you were supposed to get out of Siggi's helpful description.
The capacitor is 99% likely to be just fine. It is a very
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By
Chuck Harris
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#166970
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Re: 2465b possibly really stupid question (noob)
https://groups.io/g/TekScopes/album?id=12814. does not seem to open anything useful please check link.
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https://groups.io/g/TekScopes/album?id=12814. does not seem to open anything useful please check link.
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By
James Theonas
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#166969
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