Circuits; Introduction; Functional Description - IBM 1627 Manual

INTRODUCTION
The circuits presented in this section describe the
theory of operation for the 1627.
DRUM CONTROL CIRCUIT
1=
D=-- --- --- -- -- --
MANUAL
DRUM DOWN
PULSES
DRUM DOWN
ONE- SHOT
01-02
DRUM UP
PULSES
DRUM UP
ONE- SHOT
012-013
I
I
DRUM UP-
MANUAl.
L __
REVERSIBLE
__________ R_I_NG~E~
SECTION 3 CIRCUITS
FUNCTIONAL DESCRIPTION
The detailed block diagram of Figure 3-1 illustrates
the operation of tee 1627 in terms of signal flow and
CHART DRIVE
ON - OFF
115VAC~
----
TAKEUP SPOOL
--tEJ]
COIL I
DRUM
STEP
MOTOR
M4
COIL 2
COIL 3
CARR IAGE
CARRIAGE LEFT PULSES
COIL I
CARRIAGE
CARRIAGE
CON TROL
COIL 2
STEP
CARRIAGE RIGHT PULSES
CIRCUIT COIL 3
MOTOR
M3
,
,
CARRIAGE
LEFT-
MANUAL
CARRIAGE
RIGHT-
MANUAL
--~
PEN UP PULSES
'----
---:-
--
--
PEN
CONTROL
FLIP -FLOP
019-Q20
CONTROL
STAGES
014-015
017
PEN DOWN PULSES
+
3V
+
1.5V
GND
- 7.SV
-9V
- 24V
POWER
ON - OFF
I~>--_~
POWER
SUPPLY
Figure 3-1. 1627 Block Diagram
PEN SOLENOID CONTROL CIRCUIT
3.1