noob board repair question

thefader

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I have a stupid question, but I guess it's better to ask a stupid question than do something stupid. I am going to replace all the lamp transistors on my baby pac board, since I am having trouble with alot of the lights not working. I noticed on the back of the board, there are some solder pads that are connected, and a some in the exact same spots that arent, it looks like solder dribbled connecting them, but barely. Should these be seperated, or soldered better together after I replace the transistors, or doesnt it matter?
 

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I have a stupid question, but I guess it's better to ask a stupid question than do something stupid. I am going to replace all the lamp transistors on my baby pac board, since I am having trouble with alot of the lights not working. I noticed on the back of the board, there are some solder pads that are connected, and a some in the exact same spots that arent, it looks like solder dribbled connecting them, but barely. Should these be seperated, or soldered better together after I replace the transistors, or doesnt it matter?

Those look like they're supposed to be connected (if I'm seeing the same ones you are).

If you have a lot of the lights not working, check on the schematics and see what the common issue with most of them are. Willing to bet it's just something bad in/around the lamp driver that handles those lights.
 
I Found This, So I think my next move is to replace all the light transistors.


The AS-2518-107 lamp/solenoid driver board often has problems. Most often the 2N5060 SCRs fail causing non-working or locked-on pinball playfield lamps. The 4514 lamp decoders (U1,U2) usually don't fail though. So if some playfield lamps don't work (and its not the bulb or lamp socket), suspect a 2N5060 SCR on the lamp/solenoid driver board connector. Note the color of the wire going to the problem lamp socket. Then find this wire color on the lamp/solenoid driver board connector. Then trace the connector its corresponding 2N5060 SCR. The lower leg of the SCR can be grounded, and the playfield light should turn on. If it does the wiring from the SCR to the play field lamp is good, and the 2N5060 SCR should be replaced.
 
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