Brother P-touch BB4 Service Manual page 34

Assembling the Components of the Chassis ASSY
(1) Secure the DC motor ASSY to the chassis with two screws so that the motor lead
wires face as shown below.
(2) Set the roller holder spring onto the roller holder ASSY so that its straight end is fitted
into section "A" on the ASSY, then install them to the chassis and secure the ASSY
with the retaining ring.
(3) As shown below, turn the bent end of the roller holder spring with a flat screwdriver
and fit it into an oval hole provided in the chassis. Then secure the thermal head
ASSY with a screw.
Figure 2.2-22 Assembling the Components of the Chassis ASSY
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