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Products => Test Equipment => Topic started by: Joseph Bozzer on January 13, 2020, 10:49:35 am

Title: Yes, it's easy to add an external battery at 2465B NVRAM
Post by: Joseph Bozzer on January 13, 2020, 10:49:35 am

Why add it? :
Before this operation I couldn't read the NVRAM on my programer and after I could do it .. I was happy!


1) I used this Dremel head
    Before begin .. insert the NVRAM in a socket to protect his fragile pins !!

(https://image.noelshack.com/fichiers/2020/02/7/1578821555-r0159819web.jpg)



2) I started in front of the first "A" of text "DALLAS" ... this is where is located the pin 7 of IC
    (Luckily the DS1218 is a old DIL8 case with his large pins which will makes research easier)

(https://image.noelshack.com/fichiers/2020/02/7/1578821954-r0159808web.jpg)



3) Carefully I came down and widen the hole very near of case until i seen the copper appear
     (It's the good moment to measure the internal battery voltage between this copper and pin 14 of the NVRAM)
     Then i widened it enough to be able to solder a wire

Maybe a piece of advice : do not widen it too much on the side of the "D" and "L" of dallas so as not to short-circuit, with the dremmel head, the pins 7 with 6 or 8 of DS1218 because I don't know if that could kill  it? .. see inside picture below


(https://image.noelshack.com/fichiers/2020/02/7/1578824834-capture-2020-01-12-a-11-26-01.jpg)




4) I cut the branches of my socket to be able to easily pass the wire
    Then I soldered two wires:
        - positive on pin 7 of DS1218
        - negative on pin 14 of NVRAM

(https://image.noelshack.com/fichiers/2020/02/7/1578825024-r0159817web.jpg)


My final solution :
I decided to keep the original NVRAM equipped of an external battery
For the battery I chose this one on Amazon

(https://image.noelshack.com/fichiers/2020/02/7/1578823314-capture-2020-01-12-a-11-01-33.jpg)
Title: Re: Yes, it's easy to add an external battery at 2465B NVRAM
Post by: Zucca on January 14, 2020, 09:40:40 pm
http://www.worldphaco.com/uploads/TEKTRONIX_2465b_OSCILLOSCOPE_CALIBRATION___REPOWERING_THE_DS1225.pdf (http://www.worldphaco.com/uploads/TEKTRONIX_2465b_OSCILLOSCOPE_CALIBRATION___REPOWERING_THE_DS1225.pdf)
Title: Re: Yes, it's easy to add an external battery at 2465B NVRAM
Post by: KCT_99 on January 15, 2020, 02:06:02 pm
Thanks for sharing.  :-+