Commodore MPS-801 - Rotation Detector Adjustment

Commodore MPS-801

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MECHANICAL

ADJUSTMENTS

(Continued)

Rotation

Detector

Adjustment:

If

adjustment

of

the

dot

sensor

unit

does

not

produce

satisfactory

results,

the

rotation

detector

must

be adjusted. To

adjust

the

rotation

detector,

remove

the

BE-50S ring and

dot

sensor

unit.

Move

the

rotation

detector

4 holes,

clockwise

in

the

case

of

(b),

OR

counterclockwise

in

the

case

of

(c). When

replacing

the

rotation

detector,

be careful

that

the

two

bosses are engaged

with

the

gears

of

the

head

motor.

PLATEN

GEAR

o

00-

o

I

I

I

I

,

,

\

\

,

/

I

"\

"

o

"

ROTATION

DETECTOR

,

,

,

I

,

I

Rotate the platen gear so

that

one

of

the holes

of

it

matches hole

[8J

in

the

ground plate. Keep holding

the

platen gear

while

setting

the

rotation

detector.

Set

the

rotation

detector

so

that

part

~,

where

there is no hole, is facing hole

@]

of

the

ground

plate. Setting up by

this

method

insures

that

it

is possible

to

eliminate

the

missing upper

or

lower

part

of

a character by

only

adjusting

the

position

of

the

dot

sensor

unit.

25

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