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Took a closer look at the switches on mine. The logo is for CW Switches.

http://switches-connectors-custom.cwind.com/item/miniature-slide-switches/ted-panel-mount-miniature-slide-switches-swidgets-/item-1504?&plpver=10&origin=advsrch&by=prod&filter=0&categid=1125&prodid=1047

This is very close dimensionally.

http://www.digikey.ca/product-search/en?x=14&y=10&lang=en&site=ca&KeyWords=GF-126-0119

Not quite the same size of pins though.

Something I noticed is that the switches are installed a certain height from the PCB, but there's no standoff on the switches. If you decide to go through the trouble of replacing the switches, make sure they're put back in at the same height, otherwise I'm sure the "invert pull" won't work.

My experience with MOD info is it's very scarce on the ground. So if I can be allowed to hazard a guess....
There are two coax connectors just visible in the top set of holes within the rear plastic frame. Normally these holes aren't used.
My guess is the channel signal, after the attenuators but ahead of the position pots, is cabled out the back, one per channel.
Hope that helps,
Don

<>

Of course, that is only part of the story.
Each of those companies may hold others, such as Tek owning Keithley....

Hi !

Have you made any progress with Your 2710 SA ?

If the same msg appears when You disconnect the CFC board or the LOG board from the counters (microproc board) the malfunction can be at the log board or CFC board. For sure You should connect an oscilloscope to the counting outputs of the lopg board and cfc board and compare the signals (their amplitude should be more or less the same) .

The messages taht are described in teh manual are only partial and even if the msg is in the service manual it's description is very poor.

I think Youi should view teh signals form the log board and cfc board and compare them. Remember that the signal from the cfc board will be combined of two signals (depending on CNTSELA and CNTSELB)

Let? me know about the results.

?

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If the power supply seems OK, just turn up the CRT Bias pot and see if it lights up. A common failure is the Z-Axis hybrid, which, if bad, will cause no display. If a display appears, you may be able to see which self test is failing, and take it from there.

On Sunday, January 26, 2014 10:10 AM, machine guy <machineguy59@...> wrote:

??
The very first thing I would do is check all voltages and ripple on J119.?? There is a table of specifications for this in the service manual section for power supply trouble shooting, just before the flow chart sections 10 and 11.??

If all J119 voltages and ripple are right I would use the working 2465 you have to check signals going to the CRT.?? Especially check the unblanking signals, VZOUT and VGOUT, the prescribed waveforms are given in the service manual (waveforms 65 and 66 in the 2465 Service manual).????If there is activity closely resembling the prescribed activity in shape and, especially, amplitude the scope is trying to drive the CRT.?? The problem is very likey the high voltage board (A9) or the CRT itself.

If you have a high voltage probe you can just measure the voltage on the CRT anode pole.?? But don't do this if you??lack experience with high voltage measurement techniques as the voltage here is 14,000 volts or more.

It sounds to me that the scope is trying to operate??and there are some good indications.?? When there??are faults known to the scopes computer (board A5) it presents an error message on the CRT ("Test xxx fail?? Push A/B trigger") and the scope then tries to operate.?? But since your screen is blank??you cannot see this message.?? If there were high voltage and a VZ signal you should at least see a bright spot on the CRT.?? Since you cannot, either there is no high voltage, no VZ, or the CRT may not be lighting up??(no filament or just a??bad CRT).

You can go to the Qservice web site and see pictures of every subassembly for reference of how they should look.?? Tektronix produced these scopes for several years and used different generations of capacitors.?? So boards will look different from generation to generation but the overall layout will remain the same and there whould be uniformity within a particular build.

From: Sigur?°ur ??sgeirsson <siggi@...>
To: TekScopes@...
Sent: Sunday, January 26, 2014 11:38 AM
Subject: [TekScopes] 2465 no traces, no OSD



??
Hi y'all,

I just bought a 2467 on eBay. It came with option 9 - which I understand is the counter/timer? Unfortunately it doesn't seem to light up the CRT at all, no traces, no OSD.

On power-up, it does seem to go into diagnosis, as I have to hit one specific front-panel control before it'll respond to any others. After this, I can mess with the front panel controls, and e.g. the channel/trigger lights all toggle with their corresponding buttons. However, any time I change any setting, all the front panel LEDs flicker. Also, when I set channels 1/2 to the 50 Ohm input setting, they stick for about a second or so, but then I hear a relay toggle again, and the GND input lights up again.
Do those symptoms ring a bell with anyone here?

I took it apart and pulled the PSU??to see whether there's anything obviously broken. It looks to me like the PSU has been re-capped, as there's a mix of colors on there. I tested all the rails, and they look about right, though I couldn't load the 5V with more than a single 7.5 ohm resistance at a time. When I loaded J303, I saw an undershoot for a second or two, then it seemed to drop into regulation at ~4.9V. The 7.5 ohm on J232 didn't quite seem to be enough load, though the voltage dropped a fair bit when I did it. The 10V reference was spot on, as were e.g. the 87 and the +-15 rails.

The others were all high, but then they were unloaded...

I guess next I'll measure the rails with the PSU in-place, check ripple etc?
Are there any pictures here of 2467/2465A PSUs in original condition that I might use for comparison?
Are there other quick things I can look at to assess the damage/hopes of repair?
I understand the 2467 has a "screen saver" that'll shut down the CRT on a timer? Presumably this is under digital control - so I'm hopeful that the CRT or control circuitry isn't beyond rescue?

I have a functional 2465 I was hoping to replace with this one, so I can have peek around.

Siggi

The very first thing I would do is check all voltages and ripple on J119.?? There is a table of specifications for this in the service manual section for power supply trouble shooting, just before the flow chart sections 10 and 11.??

If all J119 voltages and ripple are right I would use the working 2465 you have to check signals going to the CRT.?? Especially check the unblanking signals, VZOUT and VGOUT, the prescribed waveforms are given in the service manual (waveforms 65 and 66 in the 2465 Service manual).????If there is activity closely resembling the prescribed activity in shape and, especially, amplitude the scope is trying to drive the CRT.?? The problem is very likey the high voltage board (A9) or the CRT itself.

If you have a high voltage probe you can just measure the voltage on the CRT anode pole.?? But don't do this if you??lack experience with high voltage measurement techniques as the voltage here is 14,000 volts or more.

It sounds to me that the scope is trying to operate??and there are some good indications.?? When there??are faults known to the scopes computer (board A5) it presents an error message on the CRT ("Test xxx fail?? Push A/B trigger") and the scope then tries to operate.?? But since your screen is blank??you cannot see this message.?? If there were high voltage and a VZ signal you should at least see a bright spot on the CRT.?? Since you cannot, either there is no high voltage, no VZ, or the CRT may not be lighting up??(no filament or just a??bad CRT).

You can go to the Qservice web site and see pictures of every subassembly for reference of how they should look.?? Tektronix produced these scopes for several years and used different generations of capacitors.?? So boards will look different from generation to generation but the overall layout will remain the same and there whould be uniformity within a particular build.


________________________________
From: Sigur?°ur ??sgeirsson <siggi@...>
To: TekScopes@...
Sent: Sunday, January 26, 2014 11:38 AM
Subject: [TekScopes] 2465 no traces, no OSD



??
Hi y'all,

I just bought a 2467 on eBay. It came with option 9 - which I understand is the counter/timer? Unfortunately it doesn't seem to light up the CRT at all, no traces, no OSD.

On power-up, it does seem to go into diagnosis, as I have to hit one specific front-panel control before it'll respond to any others. After this, I can mess with the front panel controls, and e.g. the channel/trigger lights all toggle with their corresponding buttons. However, any time I change any setting, all the front panel LEDs flicker. Also, when I set channels 1/2 to the 50 Ohm input setting, they stick for about a second or so, but then I hear a relay toggle again, and the GND input lights up again.
Do those symptoms ring a bell with anyone here?

I took it apart and pulled the PSU??to see whether there's anything obviously broken. It looks to me like the PSU has been re-capped, as there's a mix of colors on there. I tested all the rails, and they look about right, though I couldn't load the 5V with more than a single 7.5 ohm resistance at a time. When I loaded J303, I saw an undershoot for a second or two, then it seemed to drop into regulation at ~4.9V. The 7.5 ohm on J232 didn't quite seem to be enough load, though the voltage dropped a fair bit when I did it. The 10V reference was spot on, as were e.g. the 87 and the +-15 rails.

The others were all high, but then they were unloaded...

I guess next I'll measure the rails with the PSU in-place, check ripple etc?
Are there any pictures here of 2467/2465A PSUs in original condition that I might use for comparison?
Are there other quick things I can look at to assess the damage/hopes of repair?
I understand the 2467 has a "screen saver" that'll shut down the CRT on a timer? Presumably this is under digital control - so I'm hopeful that the CRT or control circuitry isn't beyond rescue?

I have a functional 2465 I was hoping to replace with this one, so I can have peek around.

Siggi

.

MDA.

They're in a bit of an inconvenient location though, eh?

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