User Manuals: Wyse WY-120 Terminal

Manuals and User Guides for Wyse WY-120 Terminal. We have 2 Wyse WY-120 Terminal manuals available for free PDF download: Maintenance Manual

Wyse WY-120 Maintenance Manual

Wyse WY-120 Maintenance Manual (96 pages)

Brand: Wyse | Category: Touch terminals | Size: 3 MB

Table of Contents

Table of Contents
4
Removal and Replacement Procedures
8
Overview
8
Terminal Modules
8
- Safety Requirements
  9
- Required Tools
  9
Keyboard Module Removal and Replacement
9
Keyboard Styles
10
- ASCII/ ANSI Keyboard Cable and PCB Removal and Replacement
  11
ASCII/ ANSI Keyboard Assembly
11
- Enhanced PC-Style Keyboard Cable and PCB Removal and Replacement
  12
Enhanced PC-Style Keyboard Assembly
12
Terminal Module Assemblies Removal and Replacement
13
Removing the Terminal Enclosure
14
- Discharging the Anode
  15
Fuse Location
15
- Terminal PCB Removal
  16
Discharging the Anode
16
- Terminal PCB Replacement
  19
- CRT Removal
  20
- CRT Replacement
  21
- Yoke Assembly Removal
  21
- Yoke Assembly Replacement
  22
Before You Start
23
- Safety
  23
- Required Tools
  23
2 Troubleshooting

23
- Error Codes
  24
  - Troubleshooting Quick Reference Guide
    25
- Primary Troubleshooting Procedures
  24
  - Diagnostic Self-Test
    24
- Loopback Test Connector Pin Assignments
  25
- Module-Level Troubleshooting Quick Reference Guide
  25
  - Reset Circuitry IC U1 Flowchart
    26
- Troubleshooting by Symptom
  26
- Troubleshooting Flowcharts
  27
- CRT Flowchart
  44
  - Adjustments and Alignments
    46
- Overview
  46
  - Safety Summary
    46
  - Required Tools
    46
- Loopback Test Connector Pin Assignments
  47
- Setting up the Test Patterns
  47
- Checking the Display Specification
  48
- Test Pattern Sequence
  48
- The Pincushion Pattern Test Screen
  49
- Adjusting the Voltage
  50
- Component Locations on the Terminal PCB
  51
- Adjusting the Terminal Display
  52
- Display Adjustment Quick Reference Guide
  52
  - Vertical Size
    54
  - Horizontal Hold
    54
  - Linearitv
    54
  - Horizontal Size
    54
  - Display Rotation
    54
  - Centering Rings
    55
- Display Tilt
  55
  - Display Magnets
    56
  - Brightness/Subcontrast Adjustment
    56
  - Focus
    56
  - Theory of Operations
    57
- Yoke Lock, Centering Rings. and Display Magnets
  55
- Introduction
  57
- Logic Circuitry Block Diagram
  57
  - 8032 Microcontroller (U6)
    58
  - Pin Assignments for the 8032 Microcontroller
    58
  - System PROM (US)
    59
  - Custom IC (U4)
    60
- Terminal PCB Logic Components Functional Description
  57
- Pin Assignments for Custom IC U4
  60
  - Display RAM (U3, U9)
    61
  - Character Fonts (U2)
    61
  - System Clock (US)
    61
  - Keyboard Buffer (U13)
    62
  - Battery Backup
    62
- Keyboard Buffer (U13) Diagram
  62
  - Parallel Port (AUX1)
    63
- System Clock Diagram
  62
- Parallel Port (AUX1) Diagram
  63
  - Serial Port (MAIN)
    64
  - Monitor/Power Supply Components Functional Description
    64
- Serial Port (MAIN) Diagram
  64
  - Line Filter
    66
  - Pulse-Width Modulator
    66
  - Main Switching Power Transformer
    67
  - Horizontal Driver
    68
  - Regulation Circuitry
    68
  - Output Filtering
    69
- Regulation Circuit
  69
  - 4-15 Flyback Transformer
    70
  - Vertical Deflection Circuit
    71
  - Video Amplifier
    72
  - Crt
    73
- Keyboard
  74
  - Parts Lists
    75
- Product Safety Notice
  75
- Terminal Assemblies
  75
- Terminal Assemblies
  77
- Terminal PCB and CRT Driver PCB
  78
6 Schematics

84

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Wyse WY-120 Maintenance Manual

Wyse WY-120 Maintenance Manual (99 pages)

Brand: Wyse | Category: Monitor | Size: 3 MB

Table of Contents

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