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Post by crudeau on Dec 15, 2013 23:46:29 GMT -5
Finally found them. There are 7 or so regulators under the coax connector on the bottom. I get 1 volt on all outer legs. All of them. So your finding something
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Post by crudeau on Dec 16, 2013 10:29:36 GMT -5
Checked again. All legs are about 1 volt. In a few I will check the voltage at the two fuses. Do you have voltages I can check right out of the power supply. I see three regulators on tge back of it
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Post by mastertech on Dec 16, 2013 10:47:27 GMT -5
I'm not at my PC with the schematic right now but if I remember correctly I think those fuses were on the AC side. So put your DMM on AC voltage and test with 1 probe on 1 fuse and the other probe on the other fuse. You should probably read at least 20 volts AC.
I will be at other PC in about an hour.
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Post by crudeau on Dec 16, 2013 11:06:52 GMT -5
Just went up to recheck. My meters on dc and I get like .01 on all legs and the fuses show nothing. Do I need the cross board that goes from the riser out of the power board to the left up rite board with ribbons to front panel. I can here the large transformer humm when I plug it in. Seems like the only wire out it not hooked up is to that upper transistor board. I think I need to test the power supply. Seems like it is sending voltages but not everything
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Post by crudeau on Dec 16, 2013 11:09:05 GMT -5
On ac I read nothing across the fuses
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Post by mastertech on Dec 16, 2013 11:42:27 GMT -5
You do have to have the board 8U-110031-4 connected but I now see there is a relay on that connector board. So here is what I need you to do for testing.
On the connector board (8U-110031-4)locate connectors CX033 and CY054. You are going to have to solder 2 small wires across these connectors. 1 wire will go from CX033 pin 1 to CY054 pin 1 and the other wire will go from CX033 pin 3 to CY054 pin 5.
Triple check your work before installing and powering up. Let me know if you then have your correct voltages on those regulators.
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Post by crudeau on Dec 16, 2013 12:08:47 GMT -5
Will do but I don't think cx033 has anything that plugs into it. Only wire tgat would fit it is from tge large transformer but that I believe goes to the cx031 on the 8u-110041-1 reg unit (tge top board)
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Post by mastertech on Dec 16, 2013 12:16:08 GMT -5
No, CX033 should have a wire from the main power transformer. CX031 on 110041-1 should also have a wire from the main transformer.
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Post by crudeau on Dec 16, 2013 12:20:37 GMT -5
Your right it does. I had a brain fart. Just got 1-1 and 3-5 jumped
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Post by crudeau on Dec 16, 2013 12:23:08 GMT -5
Ok. So now I have voltages. Ic707 shows 13.7 and 9.6
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Post by mastertech on Dec 16, 2013 12:29:53 GMT -5
Good, keep going. We need to see outputs of:
IC701
IC702
IC703
IC704
IC705
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Post by crudeau on Dec 16, 2013 12:31:09 GMT -5
Ic706 is 17 and 14.6
Ic702 is 17.5 and 7
Ic703 is 17.7 and 10.7
Ic705 is -4.7 and -16.5
Ic704 is -4.6 and -16.5
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Post by crudeau on Dec 16, 2013 12:32:46 GMT -5
Icic701 is 11.4 and 5.7
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Post by mastertech on Dec 16, 2013 12:36:15 GMT -5
Were do you have your neg probe attached?
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Post by crudeau on Dec 16, 2013 12:47:19 GMT -5
Chassis ground
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