Test 02 Fail 30 on techtronics 2465 - Page 1
Forum section: electronics / testgear

author: Beamin
author_rank: Super Contributor
timestamp: October 05, 2017, 04:31:55 pm
content: I just bought this oscilloscope the other day. I turned it on seemed to be OK other than a noisy cooling fan, I plugged an antenna into it that had a BNC end and looked at the noise. I shut the scope off today when I got the mail: My probes came today. I went back up stairs to plug them in and turn it on and it says test 2 fail 30. Then the screen for about 1 second made 4 little dots and came back to normal.Is test 30 a test that knows you just got your probes in the mail and you are excited to play with your new toy and it breaks just then because it hates me?The seller said the scope worked and they had fixed a common problem with a part over heating and added a heat sink to it.

author: tggzzz
author_rank: Super Contributor
timestamp: October 05, 2017, 05:51:05 pm
content: Some people claim that adding a heatsink to U800 can put extra damaging stresses on the IC.From the manual:

author: Beamin
author_rank: Super Contributor
timestamp: October 07, 2017, 06:38:27 am
content: Quote from: tggzzz on October 05, 2017, 05:51:05 pmI don't know what exactly was done to it as far as adding a heat sink but I'm assuming that there is just one common fix for its issue and that's what they did.The error went away but what does CH2 coupling up mean? I'm assuming it means the rocker type switch was stuck and sometimes it feels like that.I also noticed with this scope is that the signal goes away (ch1) when you jiggle the probe. I haven't figured out if this is the probe( 12$ ebay special) if its the scope, or if I'm doing something wrong.Seems in good shape but sometimes when I turn it on the cooling fan is annoyingly loud and probably has bearing wear and in need of replacement. Before I take this apart I want to make sure I'm doing everything right. Worst thing is adding new errors when you are not sure of the first one. I can't really complain because I paid so little compared to what all the other ads were for this scope; it was really cheap.

author: tggzzz
author_rank: Super Contributor
timestamp: October 07, 2017, 09:20:08 am
content: Quote from: Beamin on October 07, 2017, 06:38:27 amJoin the Yahoo! TekScopes group, and research the problem there.

author: Beamin
author_rank: Super Contributor
timestamp: October 07, 2017, 06:54:54 pm
content: Quote from: tggzzz on October 07, 2017, 09:20:08 am

author: med6753
author_rank: Super Contributor
timestamp: October 08, 2017, 10:37:11 am
content: Everything you want to know about your Tek 2465 can be found here:https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/It covers mostly the 2465B but there is valuable info on the 2465 and 2465A. Some important facts about your 2465 are...The A5 logic board is pin thru hole and therefore not affected by the SMT tantalum caps that leak and damage the board.The 2465 uses EAROM for it's calibration data which does not require on board battery backup.It uses a unique Siemens fan motor which is prone to get noisy and is unobtanium as a replacement.There is a rebuild process but it's not for the faint of heart. That rebuild process can be found here...http://antiqueradios.com/forums/viewtopic.php?f=8&t=235478If your fan is like mine and is noisy for about 15-20 minutes and then quiets down and keeps running then for now leave it alone. The important point is that it continues to run. And keep the vents on the underside of the case clear. That's where U800 is. And that thread has lots of opinions about whether it should be heatsinked or not.If you chose not to rebuild the fan motor once it does crap out the only real alternative is to modify the rear case to install a more conventional fan assembly that the 2465A and B use. I have a spare fan assembly all built up and ready to install on mine for when that happens.

author: tggzzz
author_rank: Super Contributor
timestamp: October 08, 2017, 04:12:36 pm
content: Quote from: Beamin on October 07, 2017, 06:54:54 pmYour quoting is "off". I suggest you use the "preview" button before posting (and the "modify" button afterwards).The web interface is poor, but it does enable searching theveryvaluable archive. That saves everybody's time.Email is easy to deal with, if you use your email client's facilities to the full. My mail client is set up as an IMAP client, with a filter that diverts tekscopes stuff to a separate folder. I scan that when convenient and delete most items -but I keep the ones that are particularly interesting to mefor future reference.Junk mail what's that? Oh yes, you must mean the 20 messages/day that the mail client automatically puts in a junk folder. It makes of the order of one mistake per month.I set up my email servers so that they have zero filtering: everything gets to my email client. It has learnedmypreferences, not the average of everyone's preferences.

author: Beamin
author_rank: Super Contributor
timestamp: October 10, 2017, 12:36:41 am
content: Quote from: tggzzz on October 08, 2017, 04:12:36 pmExactly that's way too much work for something I'm not going to use very often. More then likely I would post one or two questions then not use it again. There is what can be done and there is what will get done. Time spent configuring my mail box is time I could spend doing more lucrative things. I have noticed a disconnect in the way people think on tech forums: I once asked about setting up my wireless router to block people. The responses were good but not realistic. "Don't do this because it can be spoofed or hacked though..." But thats not taking into account that the average person is not going to that. Most people can be defeated by leaving the caps lock key on when entering a password. These are the people I was trying to keep out; not people from a defcon convention, but rather people that have to call tech support every time their computer doesn't do exactly what its supposed to. Last time I had call Verizon tech support I figured out what was wrong as the rep was telling me to all Microsoft. I then had to tell her how to fix the problem.

author: tggzzz
author_rank: Super Contributor
timestamp: October 10, 2017, 06:37:26 am
content: Quote from: Beamin on October 10, 2017, 12:36:41 amOK, so you don't value other people's time, and would like them to spend their time doing something you could probably do yourself. You'll get trite responses from newcomers that way.Time spent configuring my mail client is well spent: it has saved mevastamounts of cognitive energy over the decades. Yes, I mean decades, and it automatically deals with 20/30 junk/uninteresting items/day plus selects might-be-interesting items and puts them into separate folders until I scan their titles later.

author: Beamin
author_rank: Super Contributor
timestamp: October 10, 2017, 06:31:22 pm
content: Quote from: tggzzz on October 10, 2017, 06:37:26 amWhy wouldn't I value other peoples time? I just said I don't like the yahoo format and I use gmail for public emails so setting up a mail server would be a pain for something I won't use much.

author: tggzzz
author_rank: Super Contributor
timestamp: October 10, 2017, 07:57:40 pm
content: Quote from: Beamin on October 10, 2017, 06:31:22 pmYour earlier statements (which you've snipped) imply you don't bother to do your own research on TekScopes because you don't like the format. Instead you prefer to ask questions that have probably been well answered on TekScopes, and hope/expect other people to spend some of their remaining lifetime recapitulating pre-existing answers.As forwhyyou don't value other people's time, I can't answer that.

author: Beamin
author_rank: Super Contributor
timestamp: October 10, 2017, 08:35:26 pm
content: Quote from: tggzzz on October 10, 2017, 07:57:40 pmI snipped out the quotes inside of other peoples quotes so that people don't have to waste their time reading what they have already read.Yes the questions have already been answered on "tekScopes" but they haven't been answered here. Why can't the eevblog be a wealth of other information that's related to electronics be shared here as well? I personally like answering other peoples questions when I know something and don't consider it a waste of time. I do consider replies like "google it" and other non answers a waste of time. Why not make they eevblog an all encompassing repository of knowledge? When someone types a question into google and that exact search string comes up on a link to this board it helps out dave with relevant links which helps him with revenue to the site. This is what called an "organic search result" and it's invaluable to powering a site that rellies on indirect income from banner ads.

author: tggzzz
author_rank: Super Contributor
timestamp: October 10, 2017, 10:08:29 pm
content: Quote from: Beamin on October 10, 2017, 08:35:26 pmYou (conveniently?) miss the point of including context. If you don't like extended discussions with context, go and use stackexchange or edaboard.QuoteBecause that is a futile and fruitless objective.QuoteYour concern for Dave's income stream is matched by your lack of concern for other author's time.But that was my point, so QED.Thank you for your honesty.

author: Beamin
author_rank: Super Contributor
timestamp: October 11, 2017, 10:14:33 am
content: Quote from: tggzzz on October 10, 2017, 10:08:29 pmThis seems like pointless arguing over the internet where the only objective is prove you are right and the other person is wrong. I like the part where you say "Thank you for your honesty" implying "see I was right you just proved my point: you are a horrible internet troll that only cares about his own time and not others (that's the thesis I invented; no one is really arguing for or against it except myself but that is the straw I'm going to hold onto). I am going to prove to the internet who you really are with arrogant and condescending replies that demonstrate my superior mental capacity complete with Latin references (no better way to sound smug then to show your mastery of Latin) and logical fallacies!". I personally never understood people who always feel they need to prove themselves to other people. If you think about it's like they are really trying to reassure themselves that they are superior in that one limited aspect; probably because they don't have much else to go off of. To me I picture the person as having thin shell of false bravado that they have to hide behind. I was never doubting you or your intelligence. From your replies can tell you are very smart.So can we go back to talking about oscilloscopes? This noisy cooling fan is driving me nuts. I hear it can't be easily fixed. will the scope die as soon as the fan goes like a car when the temp gauge goes to red?

author: tggzzz
author_rank: Super Contributor
timestamp: October 11, 2017, 01:21:26 pm
content: Quote from: Beamin on October 11, 2017, 10:14:33 amI refer you to my reply, #2 in this thread, which succinctly and completely answered your question. After that I tried to enable you to help yourself, but in the words of the well-known proverb "you can lead a horse to water, but you can't make it drink".Apart from that, your rant above contains so many fallacious strawman arguments that it isn't worth a response. It reminds me of the old saying "that's so wide of the mark it isn't even wrong".

author: Beamin
author_rank: Super Contributor
timestamp: October 12, 2017, 03:06:07 am
content: Quote from: tggzzz on October 11, 2017, 01:21:26 pmNot worth a response? What do you call the above text? But in the words of a well known proverb "If it looks like a response quotes like a response it's probably a response".Who started the whole " fallacious responses consisting of straw man arguments/ad hominem attacks" retort? I noticed most people don't even know what a straw man is (is it the scare crow from the wizard of Oz?). Most people; not you, you obviously know what it is. You even know latin or at least abbreviations for it. I also noticed nobody said "straw man" on the internet until a few years ago. Now when ever someone doesn't understand an argument they just call it a straw man. Did you like how I put Latin in my response to seem smug/clever?"But I came in here for an argument!""No you didn't""Yes I did.""Afraid not.""Ah ha! That's not an argument that's just a contradiction!"I would say I don't have an argument. There is no clearly defined thesis or organized points supporting the thesis. But I am curious what is the point you are trying to make? Why are you trying to make one? I don't recall asking to be led down the path to enlightenment. Also when making an argument its best to first estimate the cognitive capacity of your advisory. Some people are so "wide of the mark" that they completely miss the watering hole and are not worth the time. I often compare it to a student in my elementary school; every year they tried to get him to learn how to count change. No one ever said "I think he has Down's syndrome and he's never going to get it". They also gave him card board cut outs of the change which I imagine cost more then real change.

author: george.b
author_rank: Frequent Contributor
timestamp: October 12, 2017, 11:21:15 am
content: Quote from: Beamin on October 11, 2017, 10:14:33 amFrom what I've read about the 2465, it would seem that yeah, pretty much. It has some pretty hot ASICs in there that really need cooling, U800 in particular.I don't own a 2465, but an only vaguely related 2430A, which also has strict recommendations about not being run without its covers and such.

author: Beamin
author_rank: Super Contributor
timestamp: October 15, 2017, 05:52:12 am
content: Quote from: george.b on October 12, 2017, 11:21:15 amThat's good to know. Noisy is good then. When the fan goes will I hear it stop or will there be other fans going masking the noise and it will just die on me?

author: george.b
author_rank: Frequent Contributor
timestamp: October 15, 2017, 11:01:24 am
content: Quote from: Beamin on October 15, 2017, 05:52:12 amI think the 2465 only has the one in the back, but don't quote me on that. The 2430A's fan assembly is completely different - it has one single Panaflo fan on the side (lucky me).If I were you, I'd try to lubricate the fan motor bearings. The noise is probably due to them being shot. It should probably alleviate the noise, at least temporarily, at least if they're nottoofar gone.

author: Beamin
author_rank: Super Contributor
timestamp: October 16, 2017, 08:59:33 pm
content: Quote from: george.b on October 15, 2017, 11:01:24 amThe bearings are not sealed? I can get to them without pressing them out? If all I have to do is add grease/oil to it that's well worth it for getting rid of that super annoying sound.

author: george.b
author_rank: Frequent Contributor
timestamp: October 17, 2017, 05:11:17 am
content: Quote from: Beamin on October 16, 2017, 08:59:33 pmThe bearings are bronze bushings.Quote from: Beamin on October 16, 2017, 08:59:33 pmThe link posted by med6753 shows the full rebuild procedure. Someone there says they managed to lubricate the bushings with oil without taking the whole thing apart, but then it started rattling instead of squealing. I don't know, I think it might be worth a shot nonetheless.