U10
Toshiba Abnormal Voltage / Power Supply Fault

U10 or similar code appears; cooker beeps and cancels the program shortly after starting.

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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.

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Possible Causes

Input voltage outside specified range, Failing internal SMPS power supply on main PCB, Loose mains cord connection, Power surge damage

How to Fix / Troubleshooting

Safety: Disconnect from mains before opening the unit. If you are not experienced with mains-voltage electronics, seek professional service.

  • 1. Check outlet: Test the wall outlet with another appliance or a multimeter to ensure stable voltage.
  • 2. Avoid extensions: Plug the cooker directly into a wall outlet, not a power strip or extension cord.
  • 3. Inspect power cord: Check the Toshiba power cord for cuts, burns, or loose connections at the strain relief. Replace if damaged.
  • 4. Internal PSU check: Remove the bottom cover and inspect the main PCB for bulging capacitors, burnt components, or cracked solder joints in the power supply section.
  • 5. Board replacement: If visible damage is present or U10 persists with a known-good power source, replace the main control PCB.

Do not attempt to modify the power supply or use step-up/step-down transformers not rated for the cooker’s wattage.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB
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