Radio Shack TRS-80 PT-210 Service Manual page 13

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Solenoid Assembly
1
'
(2)
to^)
Figure 9.
A gap is produced between the thermal head
(5)
and the paper by the rotary motion of the head shaft
0.
While the solenoid is not actuated, the thermal head is in contact with the thermosensitive paper so
that a print can be made at any time.
It is possible to adjust the pressure of the thermal head applied to the thermosensitive paper by chang-
ing the tension of the tension spring @located at the end of the
Control Unit
The control unit controls the recording of input/output data, the transformation of signal levels (TTL level
-
sound) and the transmission and receiving of data. Refer to the description of circuits and interface for
details.

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