smello
Member
I rebuilt the 90411 Midway power supply in my Space Zap from parts from Bob Roberts. Probably about 90% of the parts were replaced.
However, the lights and sound still do not work.
On the Transformer, I put the DMM leads on the 0 and 12v lines that go to pins 8 and 12 on the power supply and test for AC.
Nothing appears to register on the DMM. However, when I put on lead on the Common on the Transformer and measure the voltages on each of the outputs they appear correct. Is something wrong with the 0 lead from the transformer?
Could I move the wires from the 0 lead and put them on the Common on the transformer safely?
If you look at the schem, it looks why that's why I don't have audio either, since the pins that connect to the lights also provide the power to the audio amp.
Please anyone help??? I am a noob.
What else could I do to properly test what's wrong?
However, the lights and sound still do not work.
On the Transformer, I put the DMM leads on the 0 and 12v lines that go to pins 8 and 12 on the power supply and test for AC.
Nothing appears to register on the DMM. However, when I put on lead on the Common on the Transformer and measure the voltages on each of the outputs they appear correct. Is something wrong with the 0 lead from the transformer?
Could I move the wires from the 0 lead and put them on the Common on the transformer safely?
If you look at the schem, it looks why that's why I don't have audio either, since the pins that connect to the lights also provide the power to the audio amp.
Please anyone help??? I am a noob.
What else could I do to properly test what's wrong?
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