Genie
Gottlieb, 1979Genie System 1. I have no voltage going into the power supply in the backbox. I measured it earlier in the week and I had all the requisite voltages. I assume that it is a bridge rectifier issue. The Old BRs were 35 amp 200 v. Can I replace those with 35A 1000V kbpc3510W?
Quoted from MarkAnderson:... The Old BRs were 35 amp 200 v. Can I replace those with 35A 1000V kbpc3510W?
Yes, a 1000 V rectifier can replace a 200 V rectifier. The voltage rating is the max peak voltage.
The incoming voltages on a System 1 power supply board are all AC voltages. Voltages are tested at connector J1 on power supply board. Bridge power goes elsewhere. Highly unlikely your AC voltages are missing. Testing a System 1 power supply isn't simple. Follow the instructions in the link below.
Quoted from MarkAnderson:I assume that it is a bridge rectifier issue.
Have you tested the bridge?
https://www.pinwiki.com/wiki/index.php/General#Testing_a_Bridge_Rectifier
Quoted from phishrace:The incoming voltages on a System 1 power supply board are all AC voltages. Voltages are tested at connector J1 on power supply board. Bridge power goes elsewhere. Highly unlikely your AC voltages are missing. Testing a System 1 power supply isn't simple. Follow the instructions in the link below.
http://www.pinrepair.com/sys1/index.htm#power
The info and diagram here is also helpful:
Quoted from phishrace:The incoming voltages on a System 1 power supply board are all AC voltages. Voltages are tested at connector J1 on power supply board. Bridge power goes elsewhere. Highly unlikely your AC voltages are missing. Testing a System 1 power supply isn't simple. Follow the instructions in the link below.
http://www.pinrepair.com/sys1/index.htm#power
I agree with you 100%
Last week I was on Clays page. On the bottom panel I checked all of the fuses for continuity by removing them. There were 6 plus the two by the power supplies. One was bad so I replaced it then they all checked out. I checked only one playfield fuse that I could find.
Then I put my DMM on diode and checked the bridge rectifiers they all were either .4 or .6 so they were ok too. From there I went to the original system 1 power supply. At that point i had the correct voltages at a2/J1 on the connector from the bottom panel they were:
pin 1 = 11.4 volts AC
pin 2 = 11.4 volts AC
pin 3 = common
pin 4 = 13.1 volts AC
pin 5 = 13.3 volts AC
pin 6 = 68 volts AC
pin 7 = 68 volts AC
At this point i had no computer controlled lighting. I had general illumination. If I left one of the connectors unplugged the displays fully lit but did not show anything.
Now the Bridge rectifiers are showing zero. The fuses all still have continuity. All of the pins above show zero. The thoughts that I have
Is the ball tilt open when it should be closed. I see two slam switches do they look like they are closed when they are actually open?
Did I short something when removing and installing the connectors. Did the bridge rectifiers get shorted out or die?
Quoted from ForceFlow:Have you tested the bridge?
https://www.pinwiki.com/wiki/index.php/General#Testing_a_Bridge_RectifierThe info and diagram here is also helpful:
https://www.stevechannel.com/system1PowerSupply.htm
I have tested them twice see my post.
Quoted from MarkAnderson:I have tested them twice see my post.
I read it as a voltage test, rather than the diode test.
Quoted from MarkAnderson:Now the Bridge rectifiers are showing zero.
Intermittent issues can sometimes indicate one of these things:
1) The component fails under load
2) The component fails when it gets too hot
3) Loose/broken connection. Can happen when you're touching or moving things, or when heat causes things to change/expand.
Quoted from MarkAnderson:Did the bridge rectifiers get shorted out or die?
Maybe. They don't last forever, but bridges in sys1 games seem to be fairly robust. I've only had to replace one or two on system 1 games I've had.
I would check for cold soldier joints on the bridge tabs and line filter.
I've had to replace several line filters on system 1 games, so if you're not getting voltage on the bridge inputs, that's another place I'd look.
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Minneapolis, MN