On Tue, Apr 29, 2025 at 02:57 PM, Pfaff1222 wrote:
PCB on window control on 2005 Colorado.\
I'm going to assume that is the year and model of a motor vehicle.? Not everyone speaks the same language, and "Colorado" doesn't make me think "car" nearly as much as "state", but I'm sure to you it's different.)
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There are many SMD components. One came off. It has stamped on top G1 which from google searches is an NPN transistor similar to common 2N2222.
Did the Google search include the kind of circuit board where it was used?? I am certainly no expert on in-house part numbers, but I would be cautious, if the "G1" was the only thing you were going from.
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G1 might mean anything, including a datecode, or a code for the manufacturer.? (But what do I know?!)
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From schematics for the vehicle ...
That's pretty good information right there.
... that transistor powers a relay which raises the RR window. I managed to resolder in place and the window operated fine several times but came off again later. I think the pads are damaged as one is very small (collector lead) so I¡¯m not surprised.?
Is it subject to much vibration?? Maybe consider a dab of glue or silicone to hold the transistor from shaking free.? Also, try adding thin wires soldered down to the traces leading to the pads, to get better contact with them, if you can access them.
Two things I¡¯ve considered doing:
1) solder a 2n2222 in its place.?
2) I found a similar control board at the salvage shop. The transistors have a different number though. BR02. What¡¯s the chances?
That's a tough choice.? Since the 2N2222 part seems very likely, I think I might go with that.? Unless it comes off again and you can't get another one in its place.? What can you lose?
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Like I say, the code printed on the transistor might not mean anything important, but that is only a guess.? Can you tell if both boards have the same finished assembly part number?? I'm sure the service guys would go with choice #2.
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Andy
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