Spot welding when there is no current, what is the matter, ask the experts to help! Thank you Online, etc.!
Welding, has the switch been turned on? Is there an alarm signal?
There is something wrong with the control circuit.
The general switch is broken lines can be very large, if the investigation, then trouble, circuit board, circuit, electrical, SCR, transformer are within the scope of the investigation, from the second pictures, the connection board and the transformer output transformer with connections between the copper melt is bright, but it is not very clear, please transformer ash wipe off, to see if there is any marks.
