iRobot Roomba Discovery, Service Manual, Page: 18 / 87

18
Failed BiT 1 – Bumpers
Roomba Symptom: Roomba may back up and circle
with no error code.
BiT REP
A
IR
STEPS
Æ Clean area where bumper arms meet the IR sensor
housing on pcb with compressed air. If test still fails
remove arms (see
Appendix M ) and wipe sensors in
housing with alcohol.
Æ Make sure the front caster is properly inserted and
that the connectors are secure.
Æ
Inspect the bumper springs and ensure they spring
back and that there are no wires or obstructions as
they compress.
Æ Check for broken bumper arms.
Main PCB
REPL
ACE
M
ENT P
A
RT
Inner Bumper Module
QC
o
When reattaching the outer bumper verify that
wires are not being pinched and that the springs
are free to compress.
o
Ensure BiT passes.