HP 3435A Extreme Makeover

[VK5RC]

Looks really nice, well done.

[robrenz]

+1 excellent job 

[rtoi]

I just soldered new battery wires in my 3435a. The thru-hole is large and I didn't have the small plastic pieces: they would have prevented the new wire to "fall through" the hole while soldering.

[xrunner]

I just soldered new battery wires in my 3435a. The thru-hole is large and I didn't have the small plastic pieces: they would have prevented the new wire to "fall through" the hole while soldering.

Well ... interesting idea. I'll have to think about that.

[vinicius.jlantunes]

Very nice job xrunner.

One question: did you clean up the boards somehow or they were already looking that good? If you cleaned them, how did you do it?

[dom0]

This device doesn't have a fan, or ventilation openings. So while it might not be dust-proof in an IP code sense, very little dust gets in. Gold plated or flashed PCBs will look pristine for many decades, maybe even centuries, when stored dry.

[schopi68]

What purpose does the little plastic washer serve?

as there's still no answer: This washer ensures that the wire isolation has enough distance to the solder joint during soldering.

[xrunner]

This device doesn't have a fan, or ventilation openings. So while it might not be dust-proof in an IP code sense, very little dust gets in. Gold plated or flashed PCBs will look pristine for many decades, maybe even centuries, when stored dry.

Right - the case is totally enclosed. One of these meters came to me smelling like nicotine and was very nasty on the outside, but inside it was clean. Looked just like it came off the factory floor.

as there's still no answer: This washer ensures that the wire isolation has enough distance to the solder joint during soldering.

But why this wire (there's also one more on that board that has a washer)? There are so many more wires in that unit that don't have washers. 

[vinicius.jlantunes]

This device doesn't have a fan, or ventilation openings. So while it might not be dust-proof in an IP code sense, very little dust gets in. Gold plated or flashed PCBs will look pristine for many decades, maybe even centuries, when stored dry.

Right - the case is totally enclosed. One of these meters came to me smelling like nicotine and was very nasty on the outside, but inside it was clean. Looked just like it came off the factory floor.

Ahh OK, yeah I'm working on a PSU (that has a fan) so it's much worse... I did some superficial cleaning to take the bulk of the dust, but am considering a more thorough clean up.

[Deathwish]

I like seeing people do rebuilds etc , thats a nice job. Sadly anything like this costs a fortune in the UK. I did find this one though.

http://www.ebay.co.uk/itm/HP-Agilent-3435A-Digital-Multimeter-Parts-Repair-/221822107920?pt=LH_DefaultDomain_0&hash=item33a5a0c110

[rtoi]

Hi,
I found this battery on a web page. Do you think it would be ok as a replacement ?
http://www.2xpower.com/EnerSys-6V-25Ah-Sealed-Lead-Acid-Battery_p_266.html#
Thanks,
Renato

[djerickson]

I just completed a repair on a HP 3466A, this guy's big sibling: 4.5 digits. Same case, battery and charger, internal layout, look-and-feel. Even the controller IC is the same.
Check it out at http://www.djerickson.com/hp3466a-dmm/
Youtube video at https://youtu.be/5u8JeFvOjFQ
Enjoy,
Dave

[alm]

Maybe it would be better to post this as a new thread rather than reviving a six year old thread?