OK, here's the scoop:
Allways wanted to have a good analog Tek scope, was looking for a 2465B but they are a little pricey for my taste.
So I bought an A instead and quite cheaply I may add, took a gamble really because of blurry pic and the usual description "removed from a working environment"
![Wink ;)](https://www.eevblog.com/forum/Smileys/default/xwink.gif.pagespeed.ic.cldandycH0.png)
.
To my pleasant surprise when it arrived not only it worked just fine (it did
![Banging Head |O](https://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif.pagespeed.ce.8iLbFYV4Bc.gif)
) but looked really clean both outside and inside, I mean not a speck of dust ! Here's a pic of the A5 control board before removal:
![](https://i.imgur.com/0ZhcVfV.jpg)
I did not clean it in any way, cause it looks mint to me.
I meassured the battery voltage and it was very healthy 3.6V despite battery date code from 1987 !
Decided to change that damn battery anyway
![Angry >:(](https://www.eevblog.com/forum/Smileys/default/xangry.gif.pagespeed.ic.0w4zhwjvDw.png)
, ordered one from Allied and waited.
When I got it I just removed the A5 board from the scope, carefully not to short the battery or sram pins to the standoffs. I had this 18650 laying arround charged, prfect voltage 3.6V so I used it as a temporary backup during battery replacement. Here you can see it attached by soldered ! leads to one of the standoff grounds and cathode of CR2770 . There is also an 1N4007 in series with the positive lead ( just in case) .
![](https://i.imgur.com/u538FlE.jpg)
![](https://i.imgur.com/kYI5jvY.jpg)
Measured voltage, everything was fine so desoldered the original battery using my hakko 808, checked voltage again, and again no problems at all. Soldered a new battery, check the voltage, desolder temporary leads, check the voltage, everything seemed peachy, here's a pic of the new battery on the A5 board:
![](https://i.imgur.com/6EnXpzH.jpg)
Very well, here's what I saw when I turned the machine on:
![Cry :'(](https://www.eevblog.com/forum/Smileys/default/xcry.gif.pagespeed.ic.tehjCtKixU.png)
Did I deserve it?