Deckel FP3NC - Problem with NSV56 Board

[Gorki]

Hi, I have a deckel FP3NC with the following problem.

If I turn the machine on nothing happen. Then I opend the Console an on the NSV56 Board all LEDs except one are off. The Fuse Si2 is blown. If have tried to take a new Fuse, it´s blow again.

Has somebode any idea how to fix the problem?
And can someboy send me the schematic of the NSV56 board, because I have sadly no documentation to this board.
My e-Mail is gorki12345@googlemail.com

Thank you for your help.
Johan

[AlfaGTA]

Need a bit more of a clue.....
What control does your machine have?
Guessing a Dialog4 as it is an NSV 56....
Cheers Ross

[Gorki]

Oh, sorry I forget this.
The FP3NC has a Dialog 4 control.

I also tried to run the NSV 56 Board seperatly (Just the green connector in the board for the 24V supply).
But then the fuse also blows. It seems that something on the NSV Board is broken or make a short circuit.

Johan

[wrench]

Does anyone have schematics for the D4 control boards? (Hi Ross). I know they exist for the D3 set but maybe this is a good time to collect those for the D4 and then I'll be ready to do some fixing there.

Alan

[rklopp]

I have the D4 orange book. You are welcome to top by some time and borrow it.

[HankMa]

Hi there Johan
I have the same problem with a D4 I got a week ago.
exept my card is marked NSV55.
In my orange book I have the schematics for NSV 56
and the component layout.
If you have solved the problem I would be glad to know
the solution.
If you want to I can copy the drawings and mail them to you .
By the way, I have tried to change some of the big capasitors
but no luck so fare

Harald
hmadsen@online.no

[miburk]

Is the Problem still there ?

Typical on the NSV Cards is that the supply voltage and the generated voltage is monitored.
If one of these voltages is (much) to high the NSV Card itself protects and blows the fuse.

As these cards are a older, there are components on it which "die".
Repaired one card last week and found the following components destroyed: Main Transistor in the FUSE-Line , One Z-Diode of the 5V Monitoring Side defect.
The Z-Diode was optical OK but electrical shorted.

So if you are sure that the supply voltages isn't to high the NSV card is bad.
If you need further information please contact me direct. Mail-address see below.

Regards
Michael
miburk@gmx.de