Arcade Collecting > Pinball
New pin: Lethal Weapon 3 (Update: FIXED)
shardian:
I pulled the entire assembly, cleaned it, checked for problems, etc. Sanded the end a little more, so absolutely no mushrooming to speak of. The whole mechanism moves cleanly and perfectly. It acts exactly the same still! I've been reading about the transistor logic of this machine, and the L/R relay could be a remote possibility as a problem.
I also tested the diode, and got odd results. Unfortunately, I don't have any 4004 diodes - just 4001,4002,4007's.
shardian:
--- Quote from: pinballjim on September 01, 2009, 10:17:37 am ---You didn't try swapping parts, did you?
:bat
--- End quote ---
Unless a single spec of dust can hold back a high powered coil, this simply cannot be a mechanical issue. I'll be testing voltage, transistors, and the L/R relay this evening. And hey, if I get proved wrong I will happily bow to down to you as master.
shardian:
Ahh, I see what you are saying about the plunger now. Duh! okay then, I will compare assemblies with the other kickout before I do anything else. I can almost guarantee it is the right plunger though, because the link is the correct blue. It all appears to be original.
There are no parts missing.
shardian:
--- Quote from: pinballjim on September 01, 2009, 12:31:08 pm ---$1 says you've got the wrong plunger in that coil.
--- End quote ---
I'll be happy to supply you with my paypal address, or would you prefer to send cash? ;D
Assembly tests fine by directly grounding the coil, and by directly grounding the transistor. Hence, the problem lies in logic. I pulled out the board and now see why people don't like Data East. These boards cook themselves!! The 7408 chip associated with this coil has been previously replaced...badly. It is now socketed, but almost all of the solder pads on the solder side of board are gone! I'd almost bet the problem lies with a crappy connection on the associated pin.
I noticed solder pads missing on several other places on the board. Damn...some people need to stay the hell away from a soldering iron...
After looking it over, I figured I'd go ahead and put in that new board I have. I got as far as putting on 2 connectors and the batteries before I looked at the roms installed - Robocop. Uh Oh... Checked reference materials, and then checked the board - revision 2. Son of a...
So now I am kind of stuck. I don't think my soldering skills are good enough to work with missing pads. I need to do some practice and research on repair methods in this case.
shardian:
--- Quote from: pinballjim on September 02, 2009, 09:30:53 am ---The problem lies in the logic even though the mech works fine after you actuate it 1/8"?
New one to me. I'll give you your dollar when you come visit the Alamo.
--- End quote ---
Like I said, it was really weak. It will pull the plunger down, but half-heartedly. If I lightly held it, it would not go.
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