MK3 / Amiga disaster

Show me how you put the Indi MK3 into the Motherboard picture?

All RGA lines are used by Indivision AGA MK3, and each one of them must have good connection.

I don't quite understand what damage you are describing (if on the A1200 board or the MK3 board), but before trying anything else, each board needs to be repaired. Never try to operate anything known-good with anything known-bad.

Jens

Quote from Someone

is it easy to buy a new socket that I can put down myself?

I can of course sell you a new socket with all mofidications already done to it for upside-down mounting, but you need to know about two challenges when exchanging the socket:

1) the board is a multi-layer board with power supply layers in the middle. This means you need a very well-regulated soldering iron with at least 80 Watts, a short+wide tip and very quick reaction time. Even though a 50W Weller iron is a *very* good hobby device (probably even above hobby-level), it just won't cut it.

2) the product is manufactured RoHS-compliant, meaning that there is no lead in the solder. This increases heat and precise regulation requirements even further.

I take it that you've done soldering before, so additional tools like a solder pump, solder wick and flux are in your shop's selection - otherwise you probably wouldn't ask.

Jens

The connections to inner layers do have heat traps, but still, four connections into a fully-filled copper plane does pull some heat away. Another thing you could to is to cut away the socket itself and de-solder every pin one by one. This way, you can take your time, be very careful with each pin and verify the result of each pin removed right away, just by looking through the empty solder hole.

Where on the planet are you?

Jens

Shipping to Australia is about twice as expensive as the socket itself. However, there is no socket on the free market that has the properties of the ones we're using: The contacts are bent with tooling that has been made to our specifications, so the "grip point" is higher, closer to the upper edge of the insulator. Once the flicker fixer is installed, you can lift the board on the flickerfixer, and it won't fall off.

We didn't make our own tooling for the insulator itself, as it would have been way too cost-prohibitive. Instead, these sockets are made with a standard insulator, which we modify on a CNC milling machine.

If you or friends of your local Amiga user group (is there one in your area?) need something else, we could combine orders: Place an order, choose "wire transfer" as payment method and send me an eMail with the info that you want to add a PLCC upside-down socket. I'll send out the final invoice with everything from the shop order, plus the socket.

Jens

Repairing instead of buying new is sustainable. This offer will stand as long as I have these sockets, and that's going to be *very* long