Jaguar
Switch-Mode Power Supply (SMPS) Acoustic Noise
Charger emits a high‑pitched whining noise even when not charging.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Aging capacitors in low-voltage power supply, Loose transformer core or inductor, Operation at light load causing audible switching, Manufacturing tolerance in Jaguar power module
How to Fix / Troubleshooting
Safety first: Noise alone is not usually dangerous, but any smell of burning or visible damage requires immediate isolation.
- Step 1 – Confirm source: Place your ear near (but not touching) the charger to confirm the noise originates from the wallbox, not another device.
- Step 2 – Check for heat or smell: If the unit is excessively warm or smells burnt, turn it off and contact a technician.
- Step 3 – Tighten mounting: With power OFF, ensure the PCB and any transformers/inductors are firmly mounted.
- Step 4 – Monitor over time: If the noise is mild and there are no functional issues, it may be acceptable. If it worsens, the power supply module should be inspected and possibly replaced.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Jaguar Wallbox Low-Voltage Power Supply Module
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements