Chapter Operating Principles

2.1 PRINTER MECHANISM OPERATION 2-1

2.1.1 Printhead Mechanism 2-4

2.1.2 Carriage Mechanism 2-5

2.1.3 Platen Gap Adjustment Mechanism 2-6

2.1.4 Paper Feed Mechanism 2-7

2.1.4.1 Tractor Wire Operation 2-9

2.1.5 Ribbon Feed and Tractor Select Mechanisms 2-10

2.1.6 Plunger Mechanism 2-12

2.2 POWER SUPPLY OPERATION 2-13

2.2.1 Power Supply Overview 2-14

2.3 CONTROL CIRCUIT 2-13

2.3.1 Control Circuit Operation Overview 2-17

2.3.2 Reset Circuit 2-21

2.3.3 Sensor Circuits 2-22

2.3.4 CR Motor Drive Circuit 2-25

2.3.5 PF Motor Drive Circuit 2-29

2.3.6 RF Motor Drive Circuit 2-30

2.3.7 PG Motor Drive Circuit 2-31

2.3.8 Plunger Drive Circuit 2-32

2.3.9 Printhead Drive Circuit 2-33

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