https://www.greatplainselectronics.com/prodimages/GTLB1_LG.jpg
I am going to attempt to rebuild my first power supply. Here is a rookie question,
Which side is the positive leg? The components I took out was clearly marked +++
I just want to be sure before I proceed. Thanks
pasted_image (resized).jpegThere is a cap C4 on SYS 1 power supplies where negative does not go to ground. Basically negative goes to the lower potential and on this circuit the voltage on this line is below zero. I asked when I did it so I thought I'd pass it on
Quoted from Brypten:Also the side with the indent is positive on a axial cap.
Not always. On some older caps, it's the opposite way.
Here is a refurbishment guide for the power supply: http://www.pinwiki.com/wiki/index.php?title=Gottlieb_System_1#Recommended_Power_Supply_Updates_.26_Repairs
You really should replace some of the diodes as well, as they were sometimes prone to fail, short out, and burn up.
Quoted from ForceFlow:Not always. On some older caps, it's the opposite way.
Here is a refurbishment guide for the power supply: http://www.pinwiki.com/wiki/index.php?title=Gottlieb_System_1#Recommended_Power_Supply_Updates_.26_Repairs
You really should replace some of the diodes as well, as they were sometimes prone to fail, short out, and burn up.
I have never seen an axial with the indent on the negative side. Interesting...
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East Hampton, CT
