Michael Roma
Active member
Atari System1 ARIII R20 Burning
R20 (2.2ohms, 1watt) burned up on my ARIII board so I ordered some new ones and replaced it today. I powered the game on will all boards connected and noticed a burning smell again. I powered it down and pulled the ARIII again. R20 looks a little discolored but measures 2.1ohms across it.
I disconnected the main system board and powered the game back up. Resistor not burning, no smell. I left the game running for approx. 5 minutes while I tested voltage on the ARIII.
I connected the system board (without a cartridge) to the ARIII and immediately started smelling that burning smell and noticed that the solder on one of the R20 legs was heating up and getting soft. I unplugged the game and reinstalled another 2.2ohm, 1watt resistor.
Tested voltage again with only the ARIII connected...
5v was around 2.1v on the top side of resistor and 5v on the bottom (see pic)
10.3v was around 5v
15v was good
22v was 24.1v
-15v was good
-22 was -24.5v
Where should I start looking for the root of the problem... The ARIII or system board??? Thanks
- Mike
R20 (2.2ohms, 1watt) burned up on my ARIII board so I ordered some new ones and replaced it today. I powered the game on will all boards connected and noticed a burning smell again. I powered it down and pulled the ARIII again. R20 looks a little discolored but measures 2.1ohms across it.
I disconnected the main system board and powered the game back up. Resistor not burning, no smell. I left the game running for approx. 5 minutes while I tested voltage on the ARIII.
I connected the system board (without a cartridge) to the ARIII and immediately started smelling that burning smell and noticed that the solder on one of the R20 legs was heating up and getting soft. I unplugged the game and reinstalled another 2.2ohm, 1watt resistor.
Tested voltage again with only the ARIII connected...
5v was around 2.1v on the top side of resistor and 5v on the bottom (see pic)
10.3v was around 5v
15v was good
22v was 24.1v
-15v was good
-22 was -24.5v
Where should I start looking for the root of the problem... The ARIII or system board??? Thanks
- Mike
Last edited:
