Table of Contents
Page
Service Guide ML390/391
0 About This Manual
Front Cover
1
Manual Copyright
2
1 Product Specifications
1.1 General Description - General Information
3
....1.1.02 Compatibility - Microline 390/391 vs. Microline
390/391-Plus
4
1.2 Product Specifications
5
1.3 Paper Specifications
6
1.4 Physical Specifications
7
1.5 Power Requirements
8
1.6 Environmental Requirements
9
1.7 Agency Approvals
10
1.8 Options
11
1.9 Consumables
12
1.10 Memory Specifications
13
1.11 Reliability Specifications
14
2 Principles of Operation
2.1 Printer Overview - General Information
15
....2.1.02 Compatibility - Microline 390/391 vs. Microline
390/391-Plus
16
2.2 Circuit Board Description
17
....Block Diagram (Microline 390/391)
18
....Block Diagram (Microline 390/391-Plus)
19
2.3 Electrical Operation - Initialization
20
....2.3.02 Interface Control
21
....2.3.03 Print Head Drive Circuit
22
....2.3.04 Spacing Operation
23
....2.3.05 Line Feed
24
....2.3.06 Alarm Circuits
25
2.4 Mechanical Principles Of Operation - Printhead
26
....2.4.02 Space Mechanism / Operation
27
........Head Gap Adjusting Mechanism
28
............Head Gap Adjusting Mechanism - Diagram 1
29
............Head Gap Adjusting Mechanism - Diagram 2
30
....2.4.03 Ribbon Drive Mechanism / Operation
31
....2.4.04 Paper Feed Mechanism
32
....2.4.05 Paper-End Detection Mechanism
33
....2.4.06 Semi-Automatic Sheet Feeder (SASF) Operation
34
....2.4.07 Release Lever Operation
35
3 Maintenance & Disassembly
3.1 Maintenance - General Information
36
