Tennant EC-H2O T12, Service Information Manual, Page: 146 / 178

5-14
T12 Service Information 9009917 (12-12)
SERVICE
LOGIC bOARD REPLACEMENT
removinG loGic boarD
for Safety: When servicing machine, disconnect bat-
tery connections before working on machine .
NOTE: Always use two wrenches when securing the power
supply terminals or damage to the circuit board will occur.
Also, make sure the power supply terminals are secured on
the new board before installation. The torque specification
is 52 in-lbs (6 Nm).
1 .
2 .
3 .
4 .
5 .
6 .
7 .
8 .
key off . disconnect batteries .
Lift seat .
remove side access panel mounting bolt (1) .
remove side access panel and set aside .
remove circuit board cover mounting hardware (6) .
attach a wrist static strap tool to a bare metal frame
surface .
disconnect logic board connectors and cables .
remove logic board mounting screws (2) .