Power supply performance depends heavily on the operating environment and load conditions. Before concluding that the unit has failed, please check the following common issues and troubleshooting steps to resolve the problem.
| Symptom | Possible Cause | Troubleshooting / Corrective Action |
|---|---|---|
| No output voltage | Incorrect wiring (especially on the input side). | Verify all wiring connections and input polarity. |
| Output voltage does not increase | 1. Insufficient input power capacity. | 1. Ensure the input power source meets the required current and voltage specifications. |
| 2. Overcurrent protection activated by the load. | 2. Disconnect the load and check if the voltage rises under a no-load condition. | |
| Disconnected or open output cable. | Check the output cable for continuity and proper connection. | |
| The voltmeter impedance is too low for the monitor output. | Use a voltmeter with an input impedance of 10 MΩ or higher. | |
| Inaccurate voltage monitor reading / Voltage appears low | Incorrect scaling or reading interpretation. | Verify the monitor output ratio against the datasheet specifications. |
| Inaccurate current monitor reading or offset observed | 1. The voltmeter impedance is too low for the monitor output. | 1. Use a voltmeter with an input impedance of 10 MΩ or higher. |
| 2. Monitor offset voltage is not nulled. | 2. Adjust the offset null potentiometer or circuit as described in the datasheet. | |
| Audible noise or unstable output | Overcurrent condition or load mismatch. | Check if the noise persists under rated-load or no-load conditions to rule out overload. |
| Ripple exceeds specifications | External noise coupling or improper grounding. | - Use a low-noise DC input source. |
| - Use shielded cables for input and output wiring. | ||
| - Implement a single-point ground connection. | ||
| - Keep the unit and wiring away from other noise sources. |