Help me refurbish my Tek 2465 for a friend - Page 1
Forum section: electronics / testgear

author: LootMaster
author_rank: Regular Contributor
timestamp: November 25, 2020, 09:44:29 pm
content: Donating my 2465 , just 2465, 300Mhz , to a friend.I wish the best info, parts list to changeall failure prone electrolytics.All 4 traces show, it appears to work, no alarm or anything, I thinka channel seems to have ripple, nothing alarming.Instructions.Willing to pay. Hurry, Hurry...I wanna do this because last time I used abit was like in 2014.

author: med6753
author_rank: Super Contributor
timestamp: November 25, 2020, 10:17:30 pm
content: Here you go. Complete refurbishment of the 2465 PSU. Also includes parts list.https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/msg1658102/#msg1658102

author: LootMaster
author_rank: Regular Contributor
timestamp: November 25, 2020, 11:10:46 pm
content: cool, thanks, anyone wanna add their 2 cents?

author: tggzzz
author_rank: Super Contributor
timestamp: November 25, 2020, 11:20:06 pm
content: Make sure you understand how to remove the fan without the collet disintegrating.There is a good condoraudio article about the PSU.Change one PSU electrolytic at a time; two are swapped on the PCB/manual.For other problem ms, search the tekscopes archive.All that is well described elsewhere, so there is no point in us repeating it.

author: med6753
author_rank: Super Contributor
timestamp: November 26, 2020, 12:00:40 am
content: Here is the parts list.

author: LootMaster
author_rank: Regular Contributor
timestamp: November 26, 2020, 12:11:47 am
content: Splendid.I cnt wait untill I'm done and plug it in and get supr nervous and see it work.

author: LootMaster
author_rank: Regular Contributor
timestamp: December 04, 2020, 03:47:18 am
content: https://cdn.hackaday.io/files/1638907011869760/2445-2465%20Fan%20Collet.jpgoK whats the deal with this fan thing.I am panicking right now.How do I take it off.Can somebody explain to me in DETAIL?

author: LootMaster
author_rank: Regular Contributor
timestamp: December 04, 2020, 03:59:39 am
content: haha I got it

author: tggzzz
author_rank: Super Contributor
timestamp: December 04, 2020, 09:30:21 am
content: Quote from: LootMaster on December 04, 2020, 03:47:18 amMany people have, many times. Any repetition is likely to be hasty and poor quality.A little time spent researching will pay dividends, especially in terms of avoiding damage.

author: LootMaster
author_rank: Regular Contributor
timestamp: December 05, 2020, 05:48:52 am
content: Ok I changed the caps, it worked.But now...The plastic collet is broken, the plastic taper thing broke.How to a make this POS fan stik to the shaft?Does this scope really need a fan?I cant believe I have to pay to get a POS plastic thing.

author: james_s
author_rank: Super Contributor
timestamp: December 05, 2020, 06:10:59 am
content: Yes it needs a fan.It seems like you're rushing things, and in a bit over your head. This is not a scope you should be messing around inside if you don't know what you're doing. It has many parts that are irreplaceable and if you damage any of those you're screwed.

author: tggzzz
author_rank: Super Contributor
timestamp: December 05, 2020, 09:20:51 am
content: Quote from: LootMaster on December 05, 2020, 06:14:10 amThe solution has several threads...do basic researchlearn how to assess the validity and limitations of what you find during your researchtake time, don't rushlisten to hints and tips and warnings posted by othersunderstand what you don't know; avoid the Dunning-Kruger syndromebe polite to those whom you are asking for helpYou can make your own replacement collet. I suggest 3D printing it in SLA, but others have machined them out of brass.

author: LootMaster
author_rank: Regular Contributor
timestamp: December 05, 2020, 10:22:06 am
content: Sorry...Just am utterly pissed at myself and this work position and this frustrating lil fan ghwaaaaahhh

author: tggzzz
author_rank: Super Contributor
timestamp: December 05, 2020, 10:53:27 am
content: Quote from: LootMaster on December 05, 2020, 10:22:06 amApology acceptedThose collets are frustrating, but less so than the device that stores the calibration constants.

author: med6753
author_rank: Super Contributor
timestamp: December 05, 2020, 01:22:57 pm
content: The instructions I posted for you gave fair warning that the collet could break no matter how careful you are at disassembly. I've had one break and epoxy fixed it. I'm not understanding what all the fuss is. Fix it and move on. And yes, the 2465 MUST have an operational fan.

author: LootMaster
author_rank: Regular Contributor
timestamp: December 05, 2020, 01:28:14 pm
content: Its ok I'll fix it somehow.Trying to figure this out.

author: james_s
author_rank: Super Contributor
timestamp: December 06, 2020, 06:44:55 pm
content: What is wrong with people these days? Can't follow instructions and need a video? I hate when I'm looking for instructions on how to do something and all I can find is stupid videos.Frustration leads to mistakes. If you get frustrated the thing to do is set it aside and come back to it later. Bottom line is if you need precise step by step instructions then refurbishing a Tek 2465 really isn't a recommended project, the scope is likely to be damaged beyond economic repair by ham-fisted repair attempts. Just recently I worked on a scope that some novice had replaced most of the perfectly good original capacitors with Chinese knockoff crap poorly soldered and damaged the board in the process.Would have been so much better to just leave it alone.