Trying to restore an older power supply.
All isolated voltages coming out of XFMR are good
Grey = 0
Purple = 12V
White = 50V
Black = 0
Red = 36V
Yellow = 0
Orange = 11.5V
What should be coming out of this circuit board's 20-pin header?
Pin1=50V (Not used) (Trace comes directly from XFMR White 50V wire & there is no connecting wire in 20-pin Molex connector)
Pins2,3,4,5=12V (Trace comes from location[F3] 10A fuse)
Pin6=Not Used - no pin...empty hole..no traces going to it.
Pins7=0 (Trace comes from location [F4] 5A fuse)
Pins8,9,10=11.5V (Trace comes from positive side location [C1] of 63V capacitor)
Pins12,13,14,15,16= 118VAC (Trace comes from positive side of location [C2] of 63V capacitor)
Pins17,18,19=36V (Trace comes from positive side location [C3] of 25V capacitor)
Pin20= -12V (Not Used) (Trace comes from negative side location [C3] of 25V capacitor)
Pin7 is dead.
Pins12,13,14,15, and 16 which are all tied together by solder and a trace are dead.
I'm guessing these pins should be carrying DC rather than AC voltage?
if so, what should be coming out?
I want to order:
4 new caps (2@63V 6800uF and 2@25V 15000uF).
2 new rectifiers (FAGOR FB2502L B80/70-25L) or similar? The Fagors were original.
1 new NTE967 3-pin voltage regulator.
1 new Bournes 2-pin MF-R065 Resettable fuse varistor? At least that's what I think it is?
only other parts are at location [R1] a 5-colored code resistor (brown, black, black, brown, brown)? and
a 4-colored code resistor at location [R2] (yellow, black, red, gold)?
They do not appear to be burned out though I'm not sure of the resistance of them because I haven't isolated them from the board.
Can anyone help me with this circuit board?
I am going to un-solder all 9 components except for the four fuse holders to try and locate all the traces on this thing.
Is that a good plan?
Thanks for any help you can give me on this!
-Mark
Fuse side power board (resized).jpgMOV (resized).jpgCap Side power board (resized).jpg