Oki ML520 User Manual
Page 2
Table of Contents
Page
Service Guide ML520/521
0 About This Manual
Front Cover
1
Copyright Information
2
1 Product Specifications
1.1.01 General Information
3
....1.2 Physical Specifications
4
....1.3 Power Requirements
5
....1.4 Environmental Conditions
6
....1.5 Agency Approvals
7
....1.6 Operational Specifications
8
....1.7 Paper Specifications
9
....1.8 Memory Specifications
10
....1.9 Consumables
11
....1.10 Options - Cut Sheet Feeders
12
........1.10.02 Pull Tractor Kit
13
........1.10.04 Bottom Push Tractor Kit
14
........1.10.05 Serial Interface
15
........1.10.06 Roll Paper Stand
16
........1.10.08 OKISmart Typer Utility
17
....1.11 Reliability
18
2 Principles of Operation
2.1 Electrical Operation
19
....2.1.01 Main Control Board
20
........Block Diagram
21
........Program ROM
22
........RAM
23
........LSI
24
........Electrically Erasable Programmable Read Only Memory
(EEPROM)
25
....2.1.02 Initialization
26
....2.1.03 Parallel Interface Control
27
....2.1.04 Print Control
28
........LSI/Printhead Interface
29
........Gap Adjust Control
30
........Print Compensation Control
31
....2.1.05 Space and Line Feed (SP/LF) Motor Control
32
........Line Feed Motor Control
33
........Space Motor Control
34
........Encoder Disk
35
....2.1.06 Operation Panel
36
....2.1.07 Alarm Circuit
37
........Low Motor Drive Voltage Alarm
38