OKIDATA ML590 Service Manual page 4

Table of Contents
....1.10.08 OKISmart Typer Utility
....1.10.09 OKISmart Panel Utility
1.11 Reliability
2 Principles of Operation
2.1 Electrical Operation
....2.1.02 Main Control Board
........Block Diagram
........Program ROM
........RAM
........Character Generator ROM (CG ROM)
........Electrically Erasable Programmable ROM (EEPROM)
........LSI
....2.1.03 Initialization
....2.1.04 Parallel Interface Control
....2.1.05 Print Control
........LSI/Printhead Interface
........Gap Adjust Control
........Print Compensation Control
....2.1.06 Space and Line Feed (SP/LF) Motor Control
........Line Feed Motor Control
........Space Motor Control
........Encoder Disk
....2.1.07 Operation Panel
....2.1.08 Alarm Circuit
........Head Drive Time
........Print Speed
........Head Overheat Alarm Processing
....2.1.09 Power Supply Circuit
2.2 Mechanical Operation
....2.2.01 Printhead Mechanism
........Interconnect Diagram: Control Board to Printhead
........Line Feed Motor Resistance
........Space Motor Resistance
........Printhead Operation
....2.2.02 Spacing Mechanism
....2.2.03 Head Gap Mechanism
....2.2.04 Ribbon Drive Mechanism
........Color Ribbon Shift Mechanism
....2.2.05 Line Feed Mechanism
........Cut Sheet/Continuous Sheet Switching Mechanism
........Cut Sheet Paper Feed Operation
........Continuous Paper Feed (Rear Tractor Mechanism)
........Continuous Paper Feed (Pull Tractor Mechanism)
........Continuous Paper Feed (Bottom Tractor Feed
Mechanism)
Page
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83