Failed Bit 11 - Main Brush - iRobot Roomba Scheduler Service Manual

Failed BiT 11 – Main Brush
Roomba Symptom:
o Roomba does not clean or
o Brushes do not spin or sound loud
Roomba ends with error "uh-oh and 1 beep".
o
If the main brush test fails or sounds loud:
If the brush motor is not running, try connecting
an *approved* cleaning assembly to pcb main brush
connector and run test. If test passes, then the
Roomba pcb is good and we need to inspect the
returned cleaning assembly.
Inspect brush motor power wires for breaks (see
picture 1)
Inspect the output gear into brushes. Is the gear
worn out? (see picture 2)
If there is a ratcheting and grinding sound, inspect
the brush gear box and side gear box for missing
gear teeth. (see picture 3)
Main Brush Assembly
26