Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- TekScopes
- Messages
Search
|
What has Tek been merged with? was: Re: In Topic! (oddly). Manual for Beckman 777 Oxygen Analyzer?
On Sun, Jan 26, 2014 at 9:34 PM, Daniel Koller <kaboomdk@...> wrote:
Hi All,Devious. So what other sort-of Tek's are there? |
|
Re: 2246 power supply
Surprised no ones helped you on this. On the 2246 its rare that the large 3 pin secondary electrolytics fail. The common fault causing tripping is C2210 (4.7uF), usually accompanied by failure of Q2209 or Q2210 (TIP32C are ok replacements if I remember right). Components around C2210 will look burned and overheated but are almost always ok. If you are unlucky Q2214 fails also. You can test the power supply out of the case using the fan as a load for a quick test. (Carefully!) Beyond those component fails, the switching transformer and multiplier can fail. (Disconnect the flying lead from the transformer to check the multiplier) ---In TekScopes@..., <chris@...> wrote: I had posted about my 2246 scope a few days
ago but have had no replies. I have the feeling the 22xx power supplies issue has been covered and maybe people are tired of it? I am poor with the Yahoo group search function. I have been able to dredge up that capacitors and the ZS/ZM diodes are to be replaced and that sometimes a transformer fails. The symptoms I have are that I am in chirp mode if the main board is attached. Without the main board the scope will come up but my cheapie volt meter reads -41VDC when I go black to the chassis and red to the 43V TP on the power supply board. I do have a lot of the black ZS diodes. I have changed out all the silver colored, grounded case electrolytics. I have not changed out the big initial electrolytic or a couple of small ones. Any advice for me? |
|
In Topic! (oddly). Manual for Beckman 777 Oxygen Analyzer?
Hi All,?
? I figured this might be a good place to ask. ?Does anyone have a service manual for a Beckman 777 oxygen analyzer? ?I'd like to learn how it works and get it working. ? ?Why is this on topic? ?Ha! ?Well Danaher owns Tek, and I just read that Danaher and Beckman merged in 2011! ? So it's a Tek, sort of! ? All kidding aside, thanks for the help, and I hope someone has a copy of the manual. ?Dan |
|
1A4 Plug-In "Invert Switch" - Tektronix Part No. 260-0723-00
Hello All.
I am trying to locate a source for the "Invert Switches" used in the 1A4 Plug-in. Their Tektronix Part Number is: "260-0723-00". Does anyone know where I can get these, please? (Mine are faulty now and causing a serious DC imbalance in three out of four of the channels, and the fourth isn't looking so cool...). Thanks in advance. MDA |
|
Re: 2465 no traces, no OSD
Bob Koller
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 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
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 |
|
Re: 2465 no traces, no OSD
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
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 |
|
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 |
|
Re: Manual forTek R7103 scope
开云体育Ignor the message from googledoc "cannot scan …" because the files are to big to display so go direct to the download button ? The downloaded files are ok. (scanned from manoman) ? But, I checked my previous downloaded (big) files from shannonhill eg Tek 7313? - and these files are corrupt, too. ? So, maybe check your downloaded also. ? Peter |
|
Re: Manual forTek R7103 scope
Thanks for the link! I got the file with Google Crome.
Thanks to all who have helped! -----Alkuper???inen viesti----- From: Jochens Feldhaar Sent: Sunday, January 26, 2014 4:13 PM To: TekScopes@... Subject: Re: [TekScopes] RE: Manual forTek R7103 scope Hi, I just got it at docs.google.com here is the link: ... and I can open it without error! Regards, Jochen DH6FAZ Am 26.01.2014 13:15, schrieb Jochens Feldhaar: Hi, ------------------------------------ Yahoo Groups Links |
|
Re: Manual forTek R7103 scope
On my system google could not scan the large size but I okayed it to download anyway. I could find a way to download it to my hard drive. win8 insisted on storing it the a cloud somewhere. I hope I can find it.
Jerry Massengale
-----Original Message-----
From: Eino V??n?nen To: TekScopes Sent: Sun, Jan 26, 2014 9:50 am Subject: Re: [TekScopes] RE: Manual forTek R7103 scope No luck with this link either so far! I got message "Sorry, there was an error. Retrying." Maybe it works later. -----Alkuper?inen viesti----- From: Jochens Feldhaar Sent: Sunday, January 26, 2014 4:13 PM To: TekScopes@... Subject: Re: [TekScopes] RE: Manual forTek R7103 scope Hi, I just got it at docs.google.com here is the link: ... and I can open it without error! Regards, Jochen DH6FAZ Am 26.01.2014 13:15, schrieb Jochens Feldhaar: > Hi, > > I am astonished. I now tried downloading, and it is indeed broken. My > file has the length 372,134,471 bytes and is OK (tek-7103.pdf). I would > upload it, but I only can upload 16 KBytes per second, so this will not > work reliably. Strange thing is, I don't know where I got it from. > Checked all the usual suspects, but no idea came up. > > Perhaps from work tomorrow I could post it to ko4bb....? > > Regards, Jochen DH6FAZ > > > Am 26.01.2014 13:03, schrieb H.P. Deutsch: >> I repared both files, >> >> but they contain only hundreds of empty pages. >> >> Let's find some other files ;-) >> >> Peter >> >> > > > ------------------------------------ > > Yahoo Groups Links > > > > ------------------------------------ Yahoo Groups Links ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: (Yahoo! ID required) <*> To change settings via email: TekScopes-digest@... TekScopes-fullfeatured@... <*> To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... <*> Your use of Yahoo Groups is subject to: |
|
Re: Manual forTek R7103 scope
No luck with this link either so far! I got message "Sorry, there was an error. Retrying."
Maybe it works later. -----Alkuper???inen viesti----- From: Jochens Feldhaar Sent: Sunday, January 26, 2014 4:13 PM To: TekScopes@... Subject: Re: [TekScopes] RE: Manual forTek R7103 scope Hi, I just got it at docs.google.com here is the link: ... and I can open it without error! Regards, Jochen DH6FAZ Am 26.01.2014 13:15, schrieb Jochens Feldhaar: Hi, ------------------------------------ Yahoo Groups Links |
|
Re: Manual forTek R7103 scope
Make sure you are actually DOWNLOADING the file rather than trying to OPEN the file inside your browser.
toggle quoted message
Show quoted text
When trying to OPEN large files like this from inside a browser you can run into the kind of problems described earlier. The methods for DOWNLOADING the file vary by browser but typically once you click on the file you want and it trys to OPEN and then gives an error look for the "DOWN ARROW" in lower right hand corner of the screen. ...just more ADOBE and GOOGLE ..B.S. but it does work Interesting that these seem to be the "MIA" SQHill / Manoman files Dave ArtekManuals On 1/26/2014 8:13 AM, Jochens Feldhaar wrote:
Hi, --
Dave Manuals@... www.ArtekManuals.com --- This email is free from viruses and malware because avast! Antivirus protection is active. |
|
Re: Manual forTek R7103 scope
Hi,
toggle quoted message
Show quoted text
I just got it at docs.google.com here is the link: ... and I can open it without error! Regards, Jochen DH6FAZ Am 26.01.2014 13:15, schrieb Jochens Feldhaar: Hi, |
|
Re: New (to me) 7854 scope
Mark Wendt (Contractor)
On 1/25/2014 7:29 AM, Michael A. Terrell wrote:
Have you tried powering it up yet? Looks to be in fairly decentYes, and other than a couple dirty switches, it works great There Outstanding! Very good deal on that guy. I'm not familiar with that piece of equipment, so I'm afraid I'm not much help with the current rating for the meter. Mark |
|
Re: Manual forTek R7103 scope
Hi,
toggle quoted message
Show quoted text
I am astonished. I now tried downloading, and it is indeed broken. My file has the length 372,134,471 bytes and is OK (tek-7103.pdf). I would upload it, but I only can upload 16 KBytes per second, so this will not work reliably. Strange thing is, I don't know where I got it from. Checked all the usual suspects, but no idea came up. Perhaps from work tomorrow I could post it to ko4bb....? Regards, Jochen DH6FAZ Am 26.01.2014 13:03, schrieb H.P. Deutsch: I repared both files, |
|
Re: Manual forTek R7103 scope
开云体育I repared both files, but they contain only hundreds of empty pages. Let's find some other files ;-) ? Peter |
|
Re: Manual forTek R7103 scope
开云体育Thanks for the links, but I could not open these ones either! I think they
are from the same link as in my first post.
?
? From: Jochens Feldhaar
Sent: Sunday, January 26, 2014 12:28 PM
To: TekScopes@...
Subject: Re: [TekScopes] RE: Manual forTek R7103
scope ?
?
Here it is, a bit big, 313
MB. |
|
Re: Manual forTek R7103 scope
Here it is, a bit big, 313 MB.
toggle quoted message
Show quoted text
Regards, Jochen DH6FAZ Am 26.01.2014 10:43, schrieb Eino V??n?nen: Thanks for the links! I am still looking manual for R7103 model! |
|
Re: Manual forTek R7103 scope
开云体育Thanks for the links! I am still looking manual for R7103 model!
? From: mda231@...
Sent: Sunday, January 26, 2014 11:10 AM
To: TekScopes@...
Subject: [TekScopes] RE: Manual forTek R7103 scope ?
?
Hello. |
to navigate to use esc to dismiss