Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: Karetaker on March 21, 2006, 05:32:34 pm

Title: WG K7200 cap explosion! Help!
Post by: Karetaker on March 21, 2006, 05:32:34 pm

I'm working on a Wells Gardner k7200 at the moment. C101 keeps on blowing it's top. The high voltage comes up but sounds a bit strained. All large diodes and resistors test good. I can't keep it going long enough to test the B+. Any ideas?

Thanks

Title: Re: WG K7200 cap explosion! Help!
Post by: grantspain on March 21, 2006, 05:37:30 pm

the only time i have seen a cap blow its lid is when its in the wrong way round or the voltage is extremely high

Title: Re: WG K7200 cap explosion! Help!
Post by: Karetaker on March 21, 2006, 05:48:07 pm

That was my first thought as well. I'm very careful when putting them in so it would be a rare mistake. The polarity was correct when I pulled it out. I replaced it and it blew up again.

Title: Re: WG K7200 cap explosion! Help!
Post by: grantspain on March 21, 2006, 05:52:40 pm

what part of the circuit is it on?

Title: Re: WG K7200 cap explosion! Help!
Post by: Q*Bert_OP on March 21, 2006, 06:03:31 pm

voltage rating of the cap you put in?

Title: Re: WG K7200 cap explosion! Help!
Post by: Karetaker on March 21, 2006, 06:17:20 pm

160v.... I know the first thought would be that I made a mistake. It was my first thought as well. But, the cap was the correct voltage(160v), microfarads (@100 microfarads), and was put in properly (polarity).

Title: Re: WG K7200 cap explosion! Help!
Post by: Karetaker on March 23, 2006, 12:59:39 pm

Anybody????? Anything????

Title: Re: WG K7200 cap explosion! Help!
Post by: censei on March 23, 2006, 01:27:59 pm

inspect your chassis and make sure no solder/solder pieces is over lapping/touching in the circuit. Check T103 also for proper voltage.

Title: Re: WG K7200 cap explosion! Help!
Post by: Karetaker on March 27, 2006, 11:02:06 am

I don't have a schematic for it. What is T103 supposed to be? It's going to be difficult to get a reading, because this thing blows the top out of the cap in a short time.

Thanks for the input, it's greatly appreciated.