With just a circuit board containing these connections lighting a dim bulb tester hard on I need to test just the main transformer, to separate this would I connect 230v live to AC5 and neutral to AC3?
Which transformer?
You only show half, which is same as nothing.
Please post more complete schematic.
No guessing allowed on mains circuits.
Besides:
1) what´s wrong with connecting mains the proper way, straight at "K001 - Power In"?
2) I hope you are not inserting both jumpers J001 - J002 at the same time,it´s either one or the other
3) disconnect all secondaries (half) shown: at K25 and incomplete/not shown connectors under it
Much suspect your shining lightbulb comes from a secondary load problem, rather than transformer itself or its primary connections.
Even if not, let´s separate them for confirmation.
You only show half, which is same as nothing.
Please post more complete schematic.
No guessing allowed on mains circuits.
Besides:
1) what´s wrong with connecting mains the proper way, straight at "K001 - Power In"?
2) I hope you are not inserting both jumpers J001 - J002 at the same time,it´s either one or the other
3) disconnect all secondaries (half) shown: at K25 and incomplete/not shown connectors under it
Much suspect your shining lightbulb comes from a secondary load problem, rather than transformer itself or its primary connections.
Even if not, let´s separate them for confirmation.
Here's a more detailed schematic. Just jumper J001 is in circuit, all secondaries are disconnected from circuit. The dim bulb lights when secondaries are in and out of circuit.
Secondaries resistance measurement
Across k25 0.64r continuity across
Across k23 3.45r continuity across
Across k22 0.52r continuity across
Across k24 pins 1-3 4.78r continuity
3-2 2.49r continuity
1-2 2.49r continuity
Primary resistance measurement
Across k21 pins AC 3-5 9.68r continuity
5-4 2.25r continuity
4-3 7.62r continuity
Across k25 0.64r continuity across
Across k23 3.45r continuity across
Across k22 0.52r continuity across
Across k24 pins 1-3 4.78r continuity
3-2 2.49r continuity
1-2 2.49r continuity
Primary resistance measurement
Across k21 pins AC 3-5 9.68r continuity
5-4 2.25r continuity
4-3 7.62r continuity
