Printer Circuit - Olivetti ECR 7100 Service Manual

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4-14 PRINTER CIRCUIT

Printer Motor
The printer motor is activated using the signal P00 from the CPU.
This signal is normally Low, and goes High to cause the motor to run.
Printer Magnets
The signal P01 from the CPU is the input for the printer magnets.
These normally low signals drop high with a print signal
Timing Signal
The printer generates, through the use of a mechanical switch assembly, a timing signal that is
returned to the CPU.
The CPU uses this signal from the printer as the basic for timing the printer magnet signals, the
motor drive and feed.
CN3
1
WIND MOTOR
2
3
B3B-XH-A
CN6
8
7
6
PRINTER
5
(M42V)
4
3
2
1
8pin x P2.5
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Y110910 – 8
R33
33_1W
C3
0.1uF
P6V
P6V
C11
0.01uF
VCC
R37
R38
R39
C4
0.1uF
ECR7100 Service Manual
.
P6V
C5
0.1uF
U4 LB1268-E
5 4
VCC GND
6 3
OUT3 IN3
7 2
OUT2 IN2
8 1
OUT1 IN1
2.2K
2.2K
2.2K
P_TRG
P_MOTOR
WIND_ON
TP-T
RP
TP-t
57