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Need help with Gottlieb System 80a Power Board

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Kmartcivic

Posted: Monday, July 26, 2010 7:58:13 PM

Rank: Newbie
Groups: Member

Joined: 7/26/2010
Posts: 2
Location: Florida

Hello everyone. Ive been messing with this James Bond pinball machine for a while. It started with the power board giving me around 12v. where I should only be getting 8. Also had no 42v or 60v output. So I ordered the power supply rebuild kit from Big Daddys. Put the majority of everything in like the new transistor, capacitors, some diodes, and resistors, new 5v. pot, and chips, minus a few resistors and diodes that checked out ok. Now when I power it up, Im getting my 5v., 8v. which is good. But now the 42v. is giving me 60v. and the 60v. is putting out 81v. I did notice also resistor R1 and R5 are getting hot.

Ive highlighted the resistors that are getting hot.

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Posted: Monday, July 26, 2010 7:58:13 PM

Justjoe

Posted: Sunday, August 01, 2010 11:14:49 AM

Rank: Member
Groups: Member

Joined: 6/14/2010
Posts: 29
Location: Yorkville, IL

Did you check to see what your incoming voltages are at?

FireSlash

Posted: Tuesday, August 03, 2010 10:49:25 AM

Rank: Advanced Member
Groups: Member

Joined: 3/7/2010
Posts: 81
Location: Ohio

1) Use everything in the kit. I did what you did and only replaced what I thought was needed in my rebuild kit, ended up causing nothing but headaches and in the end I did the full rebuild anyway.

2) Check incoming voltages.

3) Be aware that some rails will report higher when unplugged, due to the lack of a load. Sites such as pinrepair may list these unloaded voltages for your system.

Kmartcivic

Posted: Thursday, August 19, 2010 10:33:52 AM

Rank: Newbie
Groups: Member

Joined: 7/26/2010
Posts: 2
Location: Florida

Thanks, Im gonna look into it a little more. Its driving me nuts so I gave up on it for the past week. Figure I won't get anything fixed if Im aggravated. But thanks for your inputs. Ill keep you posted on how it works out.

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