Testing PCB transformer
- Thread starter jackecole
- Start date
Ω resistance usually k Ω
WHat boiler?
It depends what pins are on the transformer. Some only have 3, some many more, on both sides.
The low voltage side will be very low resistance. If it has shorted turns it'll be just a bit less - hopeless to try to measure it.
The only way is to know what voltages you're supposed to get, and see if they're correct. Then you really need to isolate it.
Some trannys are easy, eg a puma has 24vac output and when they "go" there's nothing.
Others not so.
It depends what pins are on the transformer. Some only have 3, some many more, on both sides.
The low voltage side will be very low resistance. If it has shorted turns it'll be just a bit less - hopeless to try to measure it.
The only way is to know what voltages you're supposed to get, and see if they're correct. Then you really need to isolate it.
Some trannys are easy, eg a puma has 24vac output and when they "go" there's nothing.
Others not so.
Fail to see the logic in your thought.
Why would it need to be the PCB or the transformer? What are you using to test for voltages?
Measuring resistance on a transformer will tell you nothing. What will you compare the resistance values with- the manual is not going to tell you! You don't even say what boiler you have.
Me thinks you are in a different ballpark when it comes to fixing your boiler. Leave it alone and get someone who knows what he is doing, to have a look see.
Why would it need to be the PCB or the transformer? What are you using to test for voltages?
Measuring resistance on a transformer will tell you nothing. What will you compare the resistance values with- the manual is not going to tell you! You don't even say what boiler you have.
Me thinks you are in a different ballpark when it comes to fixing your boiler. Leave it alone and get someone who knows what he is doing, to have a look see.
G
gasafengineer
No smell = not broken/bust.
Generally, if you have 240v at the primary windings, all you need to do is to test for the expected secondary voltage.
On many this will just be a single 24v secondary winding.
However, this is all past technology! Most modern PCBs dont have a transformer and use a switched mode power supply as they are cheaper and lighter!
Tony
On many this will just be a single 24v secondary winding.
However, this is all past technology! Most modern PCBs dont have a transformer and use a switched mode power supply as they are cheaper and lighter!
Tony
G
gasafengineer
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