HP 7475A Service Manual page 51

Section VI
7475-A-22-1
PEN DRIVE
MOTOR
CLAMP
PEN LIFT BAR
PEN DRIVE
MOTOR CABLE
(IN J5)
ENCODER
CABLE
(IN J6)
SLIDER ROD
PEN DRIVE
MOTOR ASSEMBLY
Model 7475A
PEN
DRIVE
BELT
Figure 6-13. Pen Solenoid and Pen Drive
IDLE
PULLEY
SPAIN
7475-A-23-1
Figure 6-14. Pen Drive Belt Tensioner
d. Loosen the pen drive motor clamp and remove
the motor. See Figure 6-13.
e. To remove the belt, slide it from the pen carriage.
See Figure 6-15.
f. Loosen the pen solenoid mounting screw shown
in Figure 6-13. Slide the solenoid to the right and
remove the armature and spring.
g_ Slide the pen lift bar
to
the right just far enough
to
allow removal of the belt.
6-12
BELT THROUGH
PEN CARRIAGE
Figure 6-15. Pen Carriage
6-71. To replace the belt and motor, proceed as follows:
a. Replace the belt in position and replace the pen
lift bar.
b. Replace the solenoid spring and armature and
secure the solenoid back into place.
c. Slide the belt into the pen carriage. See Figure 6-15.
d. Place the idler pulley in position.