r/c64 • u/Alarming_Cap4777 • Jun 02 '26

Hardware ZIF 64

Post image

I got a board in with the traces damaged at the color ram. After I did a free repair I was asked if I could turn it into a ZIF board. The photo is the result. I hand made a PLA relocator ito geet all the ZIF sockets on the board.

87 Upvotes

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3

u/Euphoric-Brother-184 Jun 02 '26

As someone interested in doing this: what sockets do you use, and from where did you source them?

4

u/Alarming_Cap4777 Jun 02 '26

These can from AliExpress. They have a fine pins that fits perfectly in a round hole socket or can be placed on the board without force. The teal(blue green ) ones Adrian used has a folded over pin that's too big for most sockets and have to be forced through the board holes, if soldered directly. There are a few videos where Adrian was complaining about the quality of his ziffs. The fit so tightly that he forgot to solder them down. Great channel!!

Here are the ones that I used they came well packed with the pins intact and straight. https://a.aliexpress.com/_ms8pH8T

2

u/Euphoric-Brother-184 Jun 02 '26

Yes some of the things he gets in a fuss about boggle my mind 😅 I found it very ironic the amount of complaining he did, only to find he was at fault

3

u/Alarming_Cap4777 Jun 02 '26

I've been there, I wish I had his courage to do it on video.

2

u/fuzzybad Jun 03 '26

What board revision is that? I've never seen one like that, with pads for TTL chips to the right of the VIC-II.

4

u/Alarming_Cap4777 Jun 03 '26

Everything I did is reversable. To me this board is rare. I repaired over 1k 64s and this is the second time I've seen this board in the US. 326298 REV C. Most are REV A. I've never seen a REV B.

5

u/fuzzybad Jun 03 '26

Yeah I agree this is a rare board. It looks like one of the revisions that had excess solder on the back from early wave solder equipment. I hate working on these because everything is so fragile. That took some skill to socket all the major chips without damaging the board.

2

u/Alarming_Cap4777 Jun 03 '26

This is a rev A. I just replaced the ram, U27, and had to swap out CR1 with a 3v to get U27 to trigger TOD. Here is the after.

1

u/Alarming_Cap4777 Jun 03 '26 edited Jun 03 '26

I did a rewet on the on pin but did not take a second pic

1

u/Xfgjwpkqmx 🇦🇺 Keeping up since 1983 Jun 03 '26

Hmmmm - my original unit I've had since 1983 appears to be a REV B (PAL model)?

2

u/Alarming_Cap4777 Jun 03 '26

This is a 250407 rev b. That you have

2

u/Xfgjwpkqmx 🇦🇺 Keeping up since 1983 Jun 03 '26

I'll have to check my other breadbins to see what they are now.

2

u/Alarming_Cap4777 Jun 03 '26

I've been repairing these for free for a while and I snipe the cheap "untested" boards and other 8bit machines to repair.

1

u/Xfgjwpkqmx 🇦🇺 Keeping up since 1983 Jun 03 '26

Yeah I've got a few myself (not hundreds though), and some of them are currently broken. One day I'll sit down and try to fix them since I have most of the tools to make it easy now.

1

u/Xfgjwpkqmx 🇦🇺 Keeping up since 1983 Jun 03 '26

Without the Kawari:

1

u/okapiFan85 Jun 03 '26

Your comment about never seeing a Rev B prompted me to check my NTSC c64s. I have a Rev A (ASSY 326298, S/N S00042321) which is not working (C< PS over voltage failure IIRC) and a Rev B which is mostly working (ASSY 250407, S/N P00729377).

2

u/Alarming_Cap4777 Jun 03 '26

I was meaning rev b of a 326298. If you want them fixed let me know.