Electronics > Beginners

Capacitor that looks like a resistor?

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Nerull:
Never trust an non-polarized component to be in a circuit board in a specific direction.

If that band is gold and not brown, which the shinyness makes me think it almost certainly is, it can only be read one direction. Gold isn't a valid color for the value.

I saw this on a site that sells recapping kits for C64s: "The values originally fitted by Commodore can vary slightly (from their own schematics!). Please check the listed contents of the packs against those on your particular board."

Nerull:
I also note that the schematic has two U31s. I wonder if maybe the C64 engineers weren't entirely sober either.

EDIT: Actually, now that I read it closer, they've just split a single chip into separate sections of the schematic so it looks like two chips.

Jwillis:
Here's simpler code chart .

Brumby:

--- Quote from: tigr on February 18, 2018, 01:11:45 am ---Well, if 82pf, then it should have been welded on the contrary. :-//

--- End quote ---

It really doesn't matter.  I know you and I would mount it to read with the silkscreen, but this obviously isn't being done on this board.  Just take a look at R16 at the bottom right of the photo.

Nusa:

--- Quote from: Wimberleytech on February 17, 2018, 09:49:24 pm ---Looks like a capacitor according to this schematic.

--- End quote ---

Well, looking at this service manual (https://www.retro-kit.co.uk/user/custom/Commodore/C64/manuals/C64C_Service_Manual.pdf), I see a cleaner version of your snip from the schematic on the second page 21(there are two page 21's in a row). However, down on the second page 27(ditto), there's the same circuit showing C83 as 82pf. Page 17 explains there are multiple versions of the C64 boards. Guess which one the OP has?

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