Hi,
Please be aware I am a bit of a noob when it comes to PCB's, electronic circuits... thanks for the patience in advance...
Over the past years I've collected a few instrument clusters from 70's Alfa Romeo Cars (different hobby ;-) ) Before reselling, I want to make sure the basics are working. All of these clusters have basically the same PCB in use. For now I only want to test if all instrument lights are working / coming up.
Please find picture attached, some basic questions:
(All lights basically work the same way, see picture for details)
1 I assumed taking a look at the patterns would tell me which Pin (3) would match with which light. I was able to get a few tested but majority failed.
2 This board seems to have 2 'grounds' ? Why would that be?
3 What would be the best approach to verify if all connections are still working?
4 General: Why are these patterns widening / narrowing (see 1 for example), a simple line would work as well?
(For now I am using a bulb I know is ok, just replacing the position every time)
Once again, thx for the patience/replies in advance!
Please be aware I am a bit of a noob when it comes to PCB's, electronic circuits... thanks for the patience in advance...
Over the past years I've collected a few instrument clusters from 70's Alfa Romeo Cars (different hobby ;-) ) Before reselling, I want to make sure the basics are working. All of these clusters have basically the same PCB in use. For now I only want to test if all instrument lights are working / coming up.
Please find picture attached, some basic questions:
(All lights basically work the same way, see picture for details)
1 I assumed taking a look at the patterns would tell me which Pin (3) would match with which light. I was able to get a few tested but majority failed.
2 This board seems to have 2 'grounds' ? Why would that be?
3 What would be the best approach to verify if all connections are still working?
4 General: Why are these patterns widening / narrowing (see 1 for example), a simple line would work as well?
(For now I am using a bulb I know is ok, just replacing the position every time)
Once again, thx for the patience/replies in advance!