You don’t need a multimeter to confirm some of these components need changing....
I changed the components highlighted (Q4, Q5, Q6, D4, D4 & R5) in yellow except BR2 as I have tested it and it seems fine.
BR Test using Multimeter in Diode testing mode gets a reading of between 0.5v to 0.7v for :
==> -ve MM lead on either the AC legs & +ve MM lead on the -ve DC leg of Bridge Rectifier BR2
==> +ve MM lead on either the AC legs & -ve MM lead on the +ve DC leg of Bridge Rectifier BR2
All looking good and thought I was on for a quick easy fix but put it back in the game with the DMD unplugged and fuse F602 blows straight away.
FYI I have tested it in another machine so it's definitely the DMD Controller Board.
==> Is it possible that the Bridge Rectifier (BR2) can test ok but at higher voltage cause issues??
==> Are there any other components which could cause F602 to blow which I have not yet replaced??
I think I will be replacing BR2 just in case.
Thanks in advance for any suggestions