timberterror
Well-known member
Blew up the 24V on my PP7B during testing, so I made a test aid!!!
I've had a couple spare Nintendo PP7B power supplies lying around and decided I would recap one of them and put in in my Junior. I ordered the caps from Mouser a couple months ago and forgot about it.
Today I decided to do it. The capping was no problem and it went back together fine. I hooked it up to a Nintendo isolator and began to check voltages. As I was testing the +24 volts my probe slipped and shorted the +24 to the -5. I heard a pop, a little burning smell and no +24 volts. I pulled it apart and checked the fuse and it was good. I could smell, but not see any damage. Put it back together and no +24volts. Trying to test voltages on those small connectors is a royal pain.
Since I've been helping Dokert build the Atari test aids, I thought I'll build a test aid for my PP7B. I picked up a couple parts from Dokert and built it. Since I have a PP7A power supply as well I made it to test both.
On the one end it plugs into the power supply and on the other easy to use plugs for a multimeter. I made the cables 5ft long per Dave's suggestion so it would be easy to test in cab as well as on the bench.
I may have killed a power supply, but I gained a nice test aid...... - Barry
I've had a couple spare Nintendo PP7B power supplies lying around and decided I would recap one of them and put in in my Junior. I ordered the caps from Mouser a couple months ago and forgot about it.
Today I decided to do it. The capping was no problem and it went back together fine. I hooked it up to a Nintendo isolator and began to check voltages. As I was testing the +24 volts my probe slipped and shorted the +24 to the -5. I heard a pop, a little burning smell and no +24 volts. I pulled it apart and checked the fuse and it was good. I could smell, but not see any damage. Put it back together and no +24volts. Trying to test voltages on those small connectors is a royal pain.
Since I've been helping Dokert build the Atari test aids, I thought I'll build a test aid for my PP7B. I picked up a couple parts from Dokert and built it. Since I have a PP7A power supply as well I made it to test both.
On the one end it plugs into the power supply and on the other easy to use plugs for a multimeter. I made the cables 5ft long per Dave's suggestion so it would be easy to test in cab as well as on the bench.
I may have killed a power supply, but I gained a nice test aid...... - Barry

