The Webmiester
Pvt. Picklestein,
- Joined
- Aug 4, 2001
- Posts
- 425
Hi! I'm helping out a friend. He apparently had trouble with this in the past intermittently but then moved it while it was on and it stopped working.
I've been following the manual and I can see that things are definitely not receiving the voltages they should be. Checking all the test points on the transformer board is fine, but then it looks like the fuses are not getting voltage through. So at other test points, all 5 VDCs are showing up as 0.5. One set of voltages is getting through, but I think it's only because someone has soldered directly from the one of the TP's to another board.
So what's the problem here? Bridge rectifiers? Why are they necessary if the voltages already exist at the TPs? Is it easier to fix this problem or just buy a new board? The MPU has been tested in another machine and it's fine, and as far as I can tell nothing else looks amiss.
Thanks all.
I've been following the manual and I can see that things are definitely not receiving the voltages they should be. Checking all the test points on the transformer board is fine, but then it looks like the fuses are not getting voltage through. So at other test points, all 5 VDCs are showing up as 0.5. One set of voltages is getting through, but I think it's only because someone has soldered directly from the one of the TP's to another board.
So what's the problem here? Bridge rectifiers? Why are they necessary if the voltages already exist at the TPs? Is it easier to fix this problem or just buy a new board? The MPU has been tested in another machine and it's fine, and as far as I can tell nothing else looks amiss.
Thanks all.