Brand: Generic
Category: Power Supply
Document Type: Manual
Language: EN
Brand: Generic
Category: Power Supply
Document Type: Manual
Language: EN
Uploaded: Nov. 21, 2025, 7:13 p.m.
None
| Symptom | Check | Cause |
|---|---|---|
| Power switch does not turn on. | 1. Power lamp not lit. 2. Short bar coming off. 3. Overvoltage protection worked. |
Power cord disconnected or connected defectively. Input switch defective. Input fuse blown. Rear-panel short bar disconnected or loose. Voltage set too low. |
| Output voltage is zero or low. | 1. Short bar coming off. 2. Constant-voltage/current lamps do not switch. 3. Ammeter deflects with output off. 4. Oscillating |
Short bar installed defectively. Circuit defective. Output diode broken. Oscillation by remote sensing. |
| Output is excessive. | 1. Short bar coming off. 2. Output voltage/current do not fall. |
Short bars 1-2 and 6-7 come off. Power transistor or control circuit defective. |
| Output is not steady. | 1. Short bar coming off. 2. Input voltage wrong. 3. Oscillating 4. Sensing terminal floating. 5. Strong magnetic/electric fields nearby. 6. Other |
Short bar installed defectively. Out of the rated input voltage range. Oscillation by special load. Proper connection of sensing terminal. Keep away from oscillation sources. |