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http://stardot.org.uk/forums/images/smilies/eusa_clap.gif http://stardot.org.uk/forums/images/smilies/eusa_clap.gif http://stardot.org.uk/forums/images/smilies/eusa_clap.gif The err, binding machine that the office at work sometimes uses, produces slots rather than round holes. Only one person know...

Can I also pick your brains regarding the power output from the transformer? Can you advise how to go about putting a meter on the connector to check it's working correctly. Yes :mrgreen: First, unless you have a suitable DIN socket, you need a steady hand (well, three really!) to hold the DIN plug...

The capacitors fitted in most machines are rated for 85°C and the one for the 12V supply (C51) is rated at 16V, but should be rated at a minimum of 25V. I recommend using types rated at 105°C where you can get them. If not, buy 85°C type that are rated for at least 2000 hours at 85°C. It has to be s...

Switched type with a 9 pin D type connector, typically called the "Atari" standard.

The types used with the Atari 8 bit, Atari ST series, Amiga, ZX Spectrum Joystick interfaces (but not the type used with the +2 or +3) etc...

Mark

Okay, as many here will know, I have many fingers in many pies, so have a number of other retro computers. I shall start the ball rolling ;-) As well as various Memotech MTX computers, I also have: Sinclair ZX81 computers plus a lot of the Memotech peripherals / add-ons including 16k RAM, 64k RAM an...

Cheers Dave, is that your site, it is an excellent resource! Remember, any and all the mistakes are Dave's fault. No mistakes were made by the people he pinched / extracted / obtained the information from :lol: He does do a lot of work putting information on his site though :D [don't want to praise...

Recommended test points on a MTX board: There is a schematic diagram on Dave's web site. I'll let him provide the link ;-) All these tests are to be carried out with the external PSU disconnected from the computer. The regulator chips and the power transistor are under the large electrolytic capacit...

Should I risk reattaching the capacitor and putting in a new fuse? If it was my board, I would first carefully inspect it (from both sides) looking for any other damage, solder rework or other unusual things. Then test for short circuits using a multimeter on the low resistance (Ohms) range (normal...

Thinking about it, someone has desoldered one leg of that capacitor from the component side of the board, instead of removing the board from the case (and desoldering from the bottom side). It may be that they replaced, or tried to replace one of the regulator chips (7805 or 7812) or the power trans...

Looking at the picture (and the extra one on Facebook), some one has done some desoldering work on your board. The DIN connector plastic has been partly melted by a soldering iron. And there should be no wires to nowhere :shock: Was the fuse wire in the fuse just broken, or was it melted or blackene...