Electronics > Repair
Tektronix TDS3BAT rebuild
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texaspyro:
If you have a TDS2BAT,,, they have been recalled for safety issues.  Tek is still replacing them for free.
MarkL:

--- Quote from: texaspyro on November 09, 2020, 12:58:28 am ---If you have a TDS2BAT,,, they have been recalled for safety issues.  Tek is still replacing them for free.

--- End quote ---
I don't think there is a TDS2BAT, but there is TDS3BATB recall that's been out for at least 10 years:

  https://www.tek.com/service/safety/tds3000b

The TDS3BATB is a lithium ion battery.  We're talking about a rebuild on a TDS3BAT which is NiCad based.
graybeard:

--- Quote from: MarkL on November 08, 2020, 08:10:07 pm ---I have a TDS3054, so I can't vouch for compatibility of the TDS3BAT in the B series scopes.  But it would surprise me if it didn't work.

Before cycling, my rebuilt pack also showed no charge.

When the scope is plugged in, it takes about 10 or 15 seconds for the "plugged in" icon to appear.

One thing you could try is to disconnect then reconnect the battery controller to reset it and cycle the pack again.  I recall having having an issue that the controller was confused about running on battery vs. AC, and it also thought the charge in the pack was critically low and shut down the scope when in fact the batteries were fully charged.  A reset fixed it.

To check if the scope is charging the pack, you could measure the voltage across the string of cells and compare with the scope plugged in and then unplugged.  The scope will charge the pack at a maximum rate of 250mA so you will some voltage difference, or you can measure the current directly if you have a DC current probe.

Otherwise consider declaring victory and move on.  You're already doing about 2x better than any of my re-build attempts.  Four hours is great.  Maybe I was using lame NiCad cells.


FYI, I posted a photo of my LiPo mod a while ago (diode was not installed yet):

  https://www.eevblog.com/forum/repair/tektronix-tds-3014b-power-supply-by-pass/msg767729/#msg767729

I did not use the +15V or data battery terminals, so I can't confirm those functions are correct.

--- End quote ---

I'll try disconnecting it and trying again.   I have fully power cycled the battery 3 times already and it has not helped.
Dave Wise:

--- Quote from: texaspyro on November 09, 2020, 12:58:28 am ---If you have a TDS2BAT,,, they have been recalled for safety issues.  Tek is still replacing them for free.

--- End quote ---

Not to me they wouldn't.  They claim they can't ship them in Oregon.  I don't believe it.
SMdude:
Shipping batteries that contain Li-ion is becoming stupid!
I bought a used tdsbat3b on ebay. It was sent by the "Global Shipping Program". Apparently it was a prohibited item and could not be sent.
I got a refund and no battery  :(
Yet I can buy a laptop battery from china and that will be sent just fine, yet a Tektronix battery, not ok...

Does anybody have any photos of the board within the Tek batteries? I am specifically interested in the battery fuel gauge ic as I would like to roll my own li-ion tek battery and having a working fuel gauge would be novel.
I know I don't "need" the fuel gauge, but as I am going to go to the trouble of designing a board with a 12v charger, it would be nice to include if possible.
Even a photo of the older ni-cad board would suffice.

Cheers
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