Tek 2445/2465 A5 CPU board - Page 1
Forum section: electronics / testgear

author: moby
author_rank: Contributor
timestamp: November 20, 2021, 10:26:09 pm
content: My 2445 had a bad A5 board so I bought a replacement on Ebay (don't laugh please)There are a few unsubtle differencesOriginal ReplacementJ652 20 pins 26 pinsW512 34 pins 26 pinsHave I bought a pig in a poke or is there some possible resolutionCheersMike

author: factory
author_rank: Super Contributor
timestamp: November 21, 2021, 01:44:10 pm
content: Sounds like the two boards are of different ages, they made quite a lot of changes over the years, as well as the A & B variants.David

author: MarkL
author_rank: Unknown
timestamp: November 21, 2021, 10:27:32 pm
content: Quote from: moby on November 20, 2021, 10:26:09 pmJ652 with 20 pins and W512 with 34 pins is consistent with the schematic for a 2445A or 2445B. Is that not what you have?Maybe someone put the wrong nameplate on the scope? They do come off.Based on the number of pins, the replacement board you received is for a 2445 or 2465 (plain, not A or B). To further confirm, an A5 control board for a 2445 or 2465 will have a part number on it of the form 670-7279-xx. An A5 control board for an A or B version would be 670-9052-xx.The two board types are not swappable.Unless it's severely damaged, it's usually not too difficult to fix the boards in these scopes at the component level.

author: tggzzz
author_rank: Super Contributor
timestamp: November 21, 2021, 11:45:51 pm
content: I don't know whether this is relevant...https://groups.io/g/TekScopes/topic/2465b_ebay_fraud/7645072?p=Created,,,20,1,0,0

author: moby
author_rank: Contributor
timestamp: November 22, 2021, 09:05:40 pm
content: Nailed it !. My error, I bought the wrong board. Thanks, Mark, for your explanation of "A" and "Non A" board differences.At least it was not excessively pricey.MQuote from: MarkL on November 21, 2021, 10:27:32 pm

author: bdunham7
author_rank: Super Contributor
timestamp: November 22, 2021, 09:34:05 pm
content: Quote from: tggzzz on November 21, 2021, 11:45:51 pmUgh! That guy! But no, the 'conversion' is from a 2445B, a very nice but not sought after model, to the 'ultimate scope', the 2465B. The reason he got away with that is that they are very similar internally and the CPU boards interchange with only the firmware being different.The same seller is also famous for selling 'low hours' scopes, which apparently works as a selling point despite the fact that the hours can be reset and changed from diagnostic menus. I just ask "how many hours would you like on it?". I got that from a used car dealer...

author: bdunham7
author_rank: Super Contributor
timestamp: November 22, 2021, 09:34:57 pm
content: Quote from: moby on November 22, 2021, 09:05:40 pmWhich model do you actually have and is it labelled correctly?

author: moby
author_rank: Contributor
timestamp: November 22, 2021, 11:32:18 pm
content: Quote from: bdunham7 on November 22, 2021, 09:34:57 pmI have a (correctly labelled) 2445A which had a kaput 670-9052. I incorrectly bought a 670-7279 board which is for the 2445 and is incompatible with the 9052.Vendor was totally correct in his description.M