There is no output transformer, and the transformer has input and output lines

You're talking about outputless transformer power amplifiers, right? It is an audio power amplifier. A power amplifier that uses a push-pull method instead of an output transformer.

Since there is no output transformer, the sound quality can be improved by avoiding distortion caused by the core. Small size and easy to integrate. If the inverted effect of the complementary symmetry tube is used, the input transformer can also be dispensed with.

It is often used in high-fax receivers or amplifiers.

Friend, it should be an inductance coil, or it may be a reactor.

It is an audio power amplifier.

Summary. The transformer has input current, and the input current is within the normal range, indicating that the magnetic flux of the transformer is normal. Without an output, there are multiple possibilities.

First of all, it is possible that the output winding of the secondary side of this transformer has a fault, which will cause no output voltage on the secondary side after the circuit is broken. If it is a newly manufactured semi-finished transformer, it is also possible that the secondary windings are misconnected, causing the voltages to cancel each other out, so there is no output. It doesn't have to be that the transformer is damaged.

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The transformer has input current, and the input current is within the normal range, indicating that the magnetic flux of the transformer is normal. Without an output, there are multiple possibilities. First of all, it is possible that the output winding of the secondary side of this transformer has a fault, which will cause no output voltage on the secondary side after the circuit is broken.

If it is a semi-finished transformer that has just been manufactured, it is also possible that the secondary winding is misaligned, resulting in the voltage phase coarse offset each other, so there is no output. It is not necessarily that the transformer rock imitation coarse device is damaged. Hope it helps.

If my answer is helpful to you, please also give a like (comment in the lower left corner), look forward to your like, your efforts are very important to me, and your support is also the driving force for my progress. Finally, I wish you good health and a good mood!

In this phase where there is no current, the input side of the transformer is out of phase. The result is that the secondary appears to have a voltage, but this voltage is much lower than the actual value, which is the induced voltage of the windings of the other two phases of the voltage. Since there is no voltage that can provide actual power in this phase of the secondary, there is no current in this way.

If you are referring to the live zero line of the power supply system, it means that the zero line is broken. If it is the neutral line of the control transformer secondary sis electrified, it is normal. Because the secondary winding, whether it is the head or tail of the winding, Kaiqi is not connected to the neutral wire or grounding system.

Power transformer If the secondary coil has no voltage, there are the following reasons:

1. There is a power outage and no power supply.

2. The internal circuit of the primary coil is broken, or the lead wire is broken, and the input circuit of the primary coil is not connected.

3. The output terminal of the secondary coil is short-circuited, and the transformer emits a relatively loud humming sound at the same time.

4. Power transformer fuse. Broken.

Check whether the power supply is normal, and then check whether the primary coil of the transformer is in good condition.