Motor And Gear Train Assembly - Sinclair ZX Printer Service Manual

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3.2
To install the belt and styli assembly:
(a) if a stylus has been removed, place a new stylus over its
mounting spigot on the,belt.so,that the leg of the stylus.which
has the longer 'foot1 1S outside tlie belt-, secure tlie stYlus °?
pushing the retainer cap on to the spigot.
(b)
Place the belt assembly over the pulleys so that the styli are at
the outer edges of the pulleys, and the styli are in the trailing
position on the belt - the belt rotates in a clockwise direction,
viewed from the top.
{c}
Install the top cover assembly (see para 2.2).
4.

MOTOR AND GEAR TRAIN ASSEMBLY

4.1
To remove motor and gear train assembly:
(a)
Remove top cover assembly (see para 2.1).
(b)
Remove belt and styli assembly and idler pulley (see para 3.1).
(c)
Remove the drive pulley by pulling it upwards (its shaft is a
push fit in the large spur gear within the base frame).
(d)
Prise the wormshaft out of its supports, and remove it.
(e)
Prise the bevel pinion from the motor shaft, and remove the
spacer from the shaft (if fitted) .
(f)
Unsolder the wires from the motor terminals.
(g) Remove the two screws securing the motor to its mounting, and
withdraw the motor.
NOTE:
On earlier printers, the motor is lightly glued to its
mounting, and it will be necessary to prise them apart
carefully.
4.2
To install motor and gear train assembly:
Prior to installing the motor, determine whether the base frame is of
the early pattern or the later design.
a cross-shaped slot in the motor mounting flange; the later design has
a vertical slot only.
(a)
If the printer is of the early type,
suitable glue, such as Loctite, to the face of the motor.
On the early pattern, there is
4.3
apply a thin coat of

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