iRobot Roomba Discovery, Service Manual

Page: 26 / 87

26
Failed BiT 11 – Main Brush
Roomba Symptom:
o
Roomba does not clean or
o
Brushes do not spin or sound loud
o
Roomba ends with error “uh-oh and 1 beep”.
BiT REP
A
IR
STEPS
If the main brush test fails or sounds loud:
Æ 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.
Æ Inspect brush motor power wires for breaks (see
picture 1)
Æ Inspect the output gear into brushes. Is the gear
worn out? (see picture 2)
Æ If there is a ratcheting and grinding sound, inspect
the brush gear box and side gear box for missing
gear teeth. (see picture 3)
REPL
ACE
M
ENT
PART
Main Brush Assembly