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Ok, from the output side i'm getting very little ac voltage ~0.2v ish.
However on 5 of the 10 (not 8 sorry) fets i get ~110 v in the middle pin DC.
On the other 5 fets i get 0v DC on the centre pin but on all the right legs i get the same voltage (~110v).
When i test the left pins the amplifier goes into protect. No matter where i put the gnd probe, even if its on another left leg.
When the amplifier goes into protect the fan continues to run and i still get voltage on my supply side. However the buzzing noise stops coming from the caps (as the relay clicks out)
Too i have noticed that across those 4 random fets (DP3/4S) in the middle of the board, i get 2 of them with ~230v AC. Wherea the other 2 i only see about 7v DC(DP1/2R)!
Why is that???
Also when i test for voltage across any of these fets the buzzing from the capacitors gets much quieter.
These are the 4 fet's i'm on about.
However on 5 of the 10 (not 8 sorry) fets i get ~110 v in the middle pin DC.
On the other 5 fets i get 0v DC on the centre pin but on all the right legs i get the same voltage (~110v).
When i test the left pins the amplifier goes into protect. No matter where i put the gnd probe, even if its on another left leg.
When the amplifier goes into protect the fan continues to run and i still get voltage on my supply side. However the buzzing noise stops coming from the caps (as the relay clicks out)
Too i have noticed that across those 4 random fets (DP3/4S) in the middle of the board, i get 2 of them with ~230v AC. Wherea the other 2 i only see about 7v DC(DP1/2R)!
Why is that???
Also when i test for voltage across any of these fets the buzzing from the capacitors gets much quieter.
These are the 4 fet's i'm on about.
That is still ok, if you have load on or not
This seems ok too, since I is probably full bridge amp, am just not sure, do you really have 10 fets in total, coz in half bridge that could work, but you would need + and - voltages, in full bridge I don't see how whis could be, one voltage is ok, but for every bank of fets you would need the same number of fets [half has 2 banks, full has 4, so in half you have min of 2 fets and any number times that, in full, 4x any number]
This sounds to me like you do have half bridge and you do have +/-110v. What is the voltage diffrence between pins that had 100v on? Did you at all times had black lead of dvm on gnd?
Fest are probably same, so what is on the right side most right is on other side most left, Still it doesn't explain why did it go into protect. If you did with scope, you can have much problems, depends on where you put you probes gnd to... I know I could measure voltage on resistors [current] that were on - rail, coz I had to put gnd of scope to - of amp, and it was like short! Only way everything worked was if gnd is on gnd
A bit odd, but I guess amp section stops working in protect mode, or maybe there is some other thing
I have no idea, coz I don't know what they do in circuit
I think this are diods, that are part of making 110v dc
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