[Shanghyd]

Hi All,
I went to turn on my mill and there was no power. No lights, no CRT display, nothing. There are 2 fuses that provide power to the T1 transformer. Both are good. I checked for power to the 220V input and there was power. So it looks like I have power to the primary. I checked for power at the secondary side of the transformer and there was nothing.
The transformer part number is 1553957.
Any help troubleshooting is appreciated.

[cncmakers001]

Hi All,
I went to turn on my mill and there was no power. No lights, no CRT display, nothing. There are 2 fuses that provide power to the T1 transformer. Both are good. I checked for power to the 220V input and there was power. So it looks like I have power to the primary. I checked for power at the secondary side of the transformer and there was nothing.
The transformer part number is 1553957.
Any help troubleshooting is appreciated.

If you suspect the transformer is faulty and you have access to another compatible transformer, consider swapping it temporarily for testing.

[Shanghyd]

I don't have one. This transformer has input of 20 - 0 - 210 - 220 - 380 - 420 - 460 and output of 110V @ 150Va - 25V @ 50Va - 30V @ 150Va.
I guess the next step would be to use a multimeter to check the windings.
I'm looking on ebay for a replacement transformer but can't find anything with those specs yet.

[Shanghyd]

Fixed. It was fuse MF2

[bptcontrols]

heidenhain control needs 24vdc. either no input to ps, or no output. you will need schematic to trace out and test