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Test Equipment Anonymous (TEA) group therapy thread

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bd139:

--- Quote from: GerryBags on May 11, 2018, 10:44:00 pm ---P.s.: I'm a fan of Tek's idea of having the actual power switch at the back and a long connecting rod to the front panel, you start off as far away as they could design you to be.  :-DD

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This is all fun and games until the plastic goes brittle!  Pop. Bugger! Try frigging or finding a replacement one.

Older tek stuff that used glass fibre rods were much better.

GerryBags:
Now you mention it, it is a puzzle how you would go about rigging up a replacement. I needn't have been so worried, anyway, it now works a treat now it's had plenty of warm up. I'm going to do a thorough functional check tonight and see if I can copy out the cal data from the screen. It's a nice feeling finally having a working 2467B.... while it lasts! I'm touching veneer-clad chipboard, does that count as wood?

tggzzz:
These 24x5 repair notes are sufficiently useful that we would benefit from them being on some 24x5 repair thread, not merely buried in theses 10,000+ posts!

Thanks.


--- Quote from: mnementh on May 12, 2018, 03:28:21 am ---Here's links to a pdf parts list, a pdf dissertation on rebuilding the Tek 24xx DC-DC converter, a page that helped me with links to a lot of other useful info on repairing the 2465, and here is KO4BB's archive of service manuals and resources for the 2465B/2467B. Please don't forget to give back a little via the button; hosting those documents isn't free and you can skip Starbucks or McD's for a day. :-+

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med6753:
mnem, those 2 parts are exactly what I need.   :-+ You still have my snail mail address, right? Isn't great when a fellow TEA'er can help each other with their addiction?  :-DD Hopefully I can return the favor one day.  :-/O

To address your concerns....I have a 2465 DMS and I am VERY familiar with the squirrel cage fan and that colet assembly. I was able to get mine apart without breaking it with lubricant and careful prying. That was 2 years ago when I completely re-capped both supply boards. The fan motor in that scope is a little noisy upon initial power up but quickly quiets down after a few minutes. That Siemens fan motor is unobtanium and stupid complex to rebuild. So as long as it works I'm leaving it alone. The fan in this new 2465 is quiet...so far.

I've had this new 2465 on for several hours and I've also gone thru several power cycles. Absolutely NO issues except for the mentioned sweep cal being slightly off. I would think if there was an intermittent issue I'd see it by now. Later today I'm pulling the covers and give it a good visual check and measure the supply voltages at J119 on the main board. If they are OK I'm NOT pulling the power supply boards.

The A5 board: This is a 2465. The A5 is pin thru hole board with almost NO tants or other caps. Very much unlike the 2465A and 2465B which have the SMT A5 board. Also, the cal data is in an EAROM which doesn't require a backup battery. So no worries here but I understand that those EAROM chips supposedly have a finite read/write cycle and then start crapping out. The EAROM chip in the Buffer (Option) board in my 2465 DMS does take intermittent checksum errors so there seems to be some truth in that rumor.

I'll post some pix later today when I pull it apart.     

med6753:

--- Quote from: tggzzz on May 12, 2018, 07:05:11 am ---These 24x5 repair notes are sufficiently useful that we would benefit from them being on some 24x5 repair thread, not merely buried in theses 10,000+ posts!

Thanks.


--- Quote from: mnementh on May 12, 2018, 03:28:21 am ---Here's links to a pdf parts list, a pdf dissertation on rebuilding the Tek 24xx DC-DC converter, a page that helped me with links to a lot of other useful info on repairing the 2465, and here is KO4BB's archive of service manuals and resources for the 2465B/2467B. Please don't forget to give back a little via the button; hosting those documents isn't free and you can skip Starbucks or McD's for a day. :-+

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I think that stuff has already been posted in the 2465 repair thread.

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