Hi,
Sins a few days a added a DE JP to my collection. I have a problem with the power supply.
My T-rex is moving left and right but very very slow: You think perhaps ok motor is damaged but if I connect a smal bulb to it, it flashes in the way as the motor is moving. If I connect motor to an another regulated PS it runs just fine.
T-rex up and down is very smooth and ok.

So first thing I thing I did was checking the PS.: Testing +12V & -12V gives me 25VDC.
Testing +12V & GND is 10.93VDC
Testing -12V & GND is -14.07VDC with a AC rimple of 0.312VAC at 100Hz
5VDC is 5.01VDC.

But now if there is something displayed on the DMD and ugly sound (like an old color tv starting up) comes out of the speakers. The more there is on the display the more the sound changes. If I disconnect the 5V on the DMD this is almost gone but still there, but also nothing on the display.
The big capacitor is checked and is ok.

What could this be?

Alex

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With the external PS T-rex is moving good. So this is not the issue.

DB1 gives 25.19VDC at the - & +
CN1 has burned pin 10+11+12 if I measure between pin 10 + 12 there is 10.23VAC 10 + 11 there is 10.23VAC 10+11 20.4VAC
At F1 is 10.1VAC
At F2 is 10.1VAC
At F7 is 0V (GND)
I have a *.MOV file that records the sound you can find it here:

C2 has been replaced by the previous owner.

Thanks in advance!
Alex

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Fuse clip checked and they are all ok.

Ok il try this. Any idea of the brand/type of connector?