Circuit And Power - IBM System/32 Introduction And Maintenance Manual

9.1.2.4 Circuit and Power
The printer contains one print magnet card and one
motor driver card, one voltage regulator and sense
amplifier card, print emitter and forms emitter cir-
cuits, a power supply that produces 24, 30, and
10.8 Vdc, and an end-of-forms switch.
The system supplies the printer with the following:
• 48 Vac, +5 Vdc, and ground.
• A signal to reset the wire check latch in the
printer.
• Signals to fire the print wire magnets.
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• Signals to move the print head left and right
along the print line.
• Signals to advance the forms to the next line or
eject the form.
The printersupplies the system with the following:
• A signal that the printer is ready.
o A signal that a print magnet driver is on too
long (wire check).
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Forms
Feed
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Stepper
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Printer Motor
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Power Supply
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9-12
• Left margin and print emitters 1, 2, and 3 sig-
nals so the system can determine the position
of the print head and the direction it is moving.
• A signal that determines how far the forms
have advanced.
• A signal that forms are not present.
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Print Emitter
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Pickup
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Printer Status
Ready
Print Emitter
Print Wire
4 Print 4 Forms Feed
Forms Feed
Wire Check
Amplifiers
Drivers!
Head Stepper Stepper Motor
I
Emitter
End of forms
and Left
XA100
Motor Drivers!
Drivers! Amplifier
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Reset
Margin Amplifier XAll0 XAll0
ZA130
Printer
System
48 Vac
Printer
Print Head
Print Logic
Print Head
Forms Feed
+5 Vdc
Status
Position
Stepper
Stepper
Ground
Logic
Counter
Motor Logic
Motor Logic
- - -
---
Power Supply
t
Common Control Logic
1
The printer has driver cards that plug into a printed circuit board at the back of the printer.