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Modifying a 92631C-6 (Battery-less B-21 C-Board) to work like a 90631C-5 (Battery Backed B-21 C-Board)

They are probably 0.1u, as any other decoupling cap along the other pcbs.
There is nothing silkscreened on them, just brown color.
 
Nebula said:
They are probably 0.1u, as any other decoupling cap along the other pcbs.
There is nothing silkscreened on them, just brown color.
Click to expand...
These had some writing on them at one time. Some remnants remain. Its just worn off. I assume these are just polarized ceramic capacitors?
 
After doing some research, it looks like those are Tantalum Electrolytic Capacitors
 
I decided to try this myself but I wanted verify 'exactly' what I need to do so I don't mess anything up.

@rtw Does this look correct to you?

C Board.jpg


Also, I don't have any SMD resistors but as far as I know I can just use normal resistors with legs right? As long as it's 1k ohm?
S2660001.JPG


Also thank you for the information!
 
@rtw Okay I think I understand. My terminology is amateur at best so I didn't know a track was the same as a trace. So I believe you cut the track/trace that is on the PCB itself(the green part), then soldered directly to the pins on the IC.

Thank you for clarifying!
 
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Works great! Thank you very much @rtw !

A side note to anyone doing this themselves. The pads on my board where the 2 resistors need to go were VERY weak and easily wanted to peel up and off the board. I had to be extremely delicate with them when adding the resistors. You may want to mention that in your post @twistedsymphony
 
Thanks for the instructions, finished modifying my C board:

IMG_1234.jpeg


I don't like cutting traces so I lifted 42 and 44 as well, and since I plan to put in in a case I'm not worried about touching it and ruining the "floating" legs. Now the hard part, waiting for the multi to arrive 8)
 
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