I did something stupid and fried some components on the board...at least it smelled that way. No visible damage. This sucks. Anybody repair these boards?
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I did something stupid and fried some components on the board...at least it smelled that way. No visible damage. This sucks. Anybody repair these boards?
What did you do? Which board do you think you fried? Maybe it's something simple, maybe not but you never know.
Ouch, well lesson learned. It's a good idea to take plenty of pictures before you unplug any connectors and label them so you avoid what just happened. Hopefully the damage isn't too severe.
Yeah. I have no idea what that 2 pin molex connector coming from the dc out is actually for...it isn't supposed to hook to anything is it? I should have just got out the meter instead of just plugging stuff in anywhere. So dumb. But yeah, a mistake I won't make again
Off the top of my head the only 2 pin molex coming off the DC power supply is P 12 which supplies +5 volts to the coin door lights. If thats it then it looks like you put 120 Volts AC on the 5 volt line.each plug should have a number put on the connector with a black sharpie.
Which Star Trek cabinet are you working on, Dedicated, convert a cabinet,kit or cockpit ? The kit version has a 44 pin edge connector on the top cover of the card cage. The others have the 3 molex plugs on the side of the card cage.
It's a weird stern convert a cab. It does have that edge connector. So the cpu and sound board smelled funny...is it possible I got lucky and only two boards were affected by my screw up? Seems to me since they are all connected via slots that all of em were affected, I dunno. Is it repairable?
Yea they made a kit to convert Stern games. Well if you smelled something then something is damaged but how bad depends on how long it took the main 5 amp fuse to blow if it even blew. I am sure it's fixable as long as theirs no damage to the PC board but it could have took out many components and yes anything connected to the 5 volt line could have been damaged so if you send it off to be repaired it's best to send all the boards so they can be tested.
Be sure to read The Sega/Gremlin X-Y FAQ written by: Mark Jenison
http://www.darkstararcade.com/mars/faq/SegaXY_FAQ.txt
Wile you can test your boards in your Eliminator game the only 2 boards that are a direct swap are the X-Y timing and control boards and if you put them in your Eliminator and they are bad then they could damage your monitor. Star Trek and Eliminator CPU boards are the same but you would have to swap the special chip (protection chip/slapstick) at U21 and an EPROM at U25 as they are specific for each game and Eliminator dose not use a speech board and the sound boards are different too so you can swap some boards around but you cant test every board. If you had another working Star Trek board set then their would be no problem.
I would start by checking the power supply voltages from your Star Trek power supply with your boards disconnected and look at all your boards for any blown/burnt components. One step at a time.
As I understand it, you applied AC between +5V and GND pins.
I would take each board out individually, and ohm 5V/GND to find any short on that board. I would guess the input caps were affected and they may or may not have saved the ICs. (more "may not" than "may").
Look for small holes in the IC packages. These might be found at the top of the package or at the side where the pins are. Got a microscope?
Example (damage may not be as extreme/obvious):
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So you swapped the AC and DC cables on the power supply or plugged the AC directly into the cage?
Thats a bummer man. Lots of parts could have been damaged by either scenario.
If douglasgb doesnt take it on LMK. I could probably help out here.