missile command

[banditman]

Have a problem with a missile command upright, i know it is not the pcb or audio reg board as i have three of each. when the machine is first switched on it has very low -5v & +5v, after 5 minutes the machines works fine, seems to be when the machine is in a cold state, anyone out there who can help,or might have working power block

 

[trm]

If you just want to buy a power brick I can move this into Wanted for you, as you'll get more chance in there. But if you're interested in actually fixing it then you're in the right place and you'll get all the help you need.

cheers

tim

 

[tb lilley]

Strange set of symptoms. Have you checked what's going on with the power block from cold?

If you fancy it look for the 12 pin molex on the right hand side of the power block, then remove it.

4 columns of 3 pins. Column 1 = pins 1-3 from top to bottom, colums 2 = pins 4-6 etc.

With the power on you'll be looking for:

Pins 1&2 = 10.3VDC
Pins 4&6 = 25VAC
Pins 4&5 = 12.5VAC
Pins 11&12 = 6.3VAC

 

[banditman]

thanks for that. all for buying a power block as well as trying to fix the one i have, please could you move into wanted

thanks

steve

 

[tb lilley]

Good luck trying to find one to buy. As rare as hen’s teeth as they differ quite a bit from the power blocks used in most other Atari machines of that era.