| Arcade Collecting > Restorations & repair |
| 3.6v Tadiran Lithium Inorganic AA Battery |
| << < (3/10) > >> |
| spisi:
OK, I see the batteries now (page 45), but my board only has the one battery... |
| spisi:
Here's a board on e-bay that's missing the battery/batteries (top right) I guess a full size AA is doing the work of two smaller ones? :dunno This board seems to be missing the same chips... |
| PL1:
--- Quote from: spisi on August 24, 2022, 12:54:32 pm ---my board only has the one battery --- End quote --- Not a problem. The schematic shows that B1+ goes to pin 2 of the DS1221 and B2+ goes to pin 15. Page 1 of the DS1221 datasheet here says "Provides for redundant batteries" and note 2 on page 5 says "Only one battery input is required." If you want to maintain the memory while you replace old battery B1, you can solder the new battery in the B2 position before you remove the old battery. Scott |
| spisi:
Great! Thanks. |
| spisi:
OK, tested it with a multimeter and got a whopping 0.00! This type of battery tests the same as a regular AA battery I assume? I tested a Duracell AA and got a reading of 2.05. Here's another pic of the board. So, I guess I could leave the old battery in place and solder a new second battery in the B2 area and see what happens. |
| Navigation |
| Message Index |
| Next page |
| Previous page |