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Tungsten needle burnt seriously

Can not break the oxide film when

welding aluminum

and replaced.

(2) If the abnormal indicator does not light:

a. It may be damaged in the middle plate transformer. The primary

inductance and Q value of the main transformer can be measured by

the bridge.

b. It may be that the transformer secondary rectifier is individually

broken down, and the same type of rectifier is found and replaced.

4. It may be that the feedback circuit is open.

The duty cycle is adjusted too much to reduce the duty cycle.

1. The welding gear selection is incorrect;

2. The duty cycle adjustment is too small;

3. The secondary inverter has field tube damage.