Troubleshooting
Model: C520U/C531U
Malfunction: Unit will not start (battery).
Circumstance: Display shuts off when no one pedals.
Possible causes: 1. Wires are not connected.
2. Battery voltage is too low.
Troubleshooting: 1. Inspect all wire and bridge board connections.
2. Inspect battery voltage. Normal: 5.5V or more.
3. Inspect the drive board F2 fuse.
4. If battery voltage is lower than 5.5V, pedal at over 50 RPM to
recharge the battery.
3-2-1
Drive
Board
Display
board
Battery
F3 fuse
Power LED
Test battery voltage.
Display requires 5.3V or
more to operate.
Inspect IC
Display power supply LED1.
