QL MicroDrive electrolytic caps

[keyboardjunkie]

Hey Nasta,

Thanks for the heads up - I've ordered some 220nF and 470nF polyester film caps - for all the cost, I'll replace them and see where that takes me.

Hopefully it's not the head..

Cheers,

Mark.

[keyboardjunkie]

And the caps arrived.. still nothing.. time to look some more..

I'll maybe break the scope out and check the waveforms on the new ULA to make sure that's working..

M

[keyboardjunkie]

Hey everyone,

Thanks for all the pointers and help with my QL. Just a small update..

I replaced the caps on the MDV PCB (electrolytics) with the caps mentioned here.. and no dice.

I then replaced 2 transistors on the motherboard and also the 1N4148 at D28.. and the MDV will read sometimes, sometimes not. It will not format or write..

I then took the plunge and removed the MDV PCB and transplanted that onto a parts MDV that I had with a broken ULA - and everything now works fine.. I guess the head was on the way out..

Thanks for all the help as usual!

Mark.