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EICO 565 Battery Placement

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Charles Taylor

New Member
First post on this forum.

I am trying to rehab an EICO 565 meter that belonged to my friend's father (passed long ago). I want to get it working if possible and give it to my friend for his birthday. The major problem at the moment is that one of the AA battery clips has corroded and gone missing. I have ordered a battery holder that I think I can use a part of to replace the clip. But I am not sure how the batteries (4 AA and one D) are inserted. Annotated picture attached. Help greatly appreciated.

TIA

Charles

IMG_1373.JPG
 

dr pepper

Well-Known Member
Most Helpful Member
Heres what I'd do.
Pull the board, look at the red ring terminal which is also marked +, most likely that goes to the + of one of the batts, then each battery will go + to - on the holders connections meaning the last - terminal of the 4th battery will go to the black ring terminal or -.
Its also likely each battery will be opposite the one next to it.
Thats only an educated guess though, I see there are a couple of taps so the above might not be correct.
Edit: I found this, b1 to b4 is shown and the larger b5, if the circuit is the same it will give some some pointers, notice though this schem doesnt show any taps the 4 cells are just a 6v source.
https://www.nostalgickitscentral.com/eico/schematics/eico_schematic_555-565.pdf
 

Rich D.

Active Member
Allow me to speculate on the pix I see above.
1) It appears the two wires (orange and black) with the screw tabs are simply going thru the battery board to an analog meter below. They are not part of the battery circuit.
2) The AA cells are wired in series to make a single 6V battery. This can be seen with the corroded metal that still remains.
2) It appears that the gray wire is used to connect the two batteries together, the AA cells and the D cell. That appears to be a common point.
If that's true, then the purple wire is the 6 volt source.
3) There is a broken gray wire between the two cells. It appears that it should be attached with the other gray wire on the AA battery terminal, but actual visual inspection should be able to prove that.

* The rest of those AA contacts look pretty bad. I would just try to find a way to insert a whole new 4xAA battery holder in there, or even AAA if space is a problem. AAA's will probably work as well but just not last as long.
What remains still has remnants of corrosive material on them, and will continue to corrode if not removed. Get rid of any corrosion, including if there is any on the D cell holder.
* From the schematic offered above, it appears that the D cell's gray wire is the + side of the battery. That means that the purple wire on the AA's is a negative.
I can't say for sure if that schematic is the right one, but if so that confirms that the gray wires are + for the AA's and - for the D cell.
Without seeing where those wires go to, there is no absolute way to know the polarity. My guess is that the schematic is right.
 

Charles Taylor

New Member
Thank you for your answers. Yes, I understand that the grey wire connecting the D and AA cells is broken. I will re-solder it after I fix the AA cell holder situation.

Will connect it up when the new battery holder arrives, and post an update.

Cheers,

Charles
 
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