Removal And Replacement Procedures; Overview - Wyse WY-60 Maintenance Manual

2 REMOVAL AND REPLACEMENT PROCEDURES
Overview 2-1
Safety 2-2
Required Tools 2-3
Removing and Replacing Assemblies in the
Keyboard Modules 2-3
ASCII Keyboard Replacement 2-4
ASCII Keyboard Cable Replacement 2-5
ASCII Keyboard PCB Replacement 2-6
316X- and AT-Style Keyboard Replacement 2-7
316X- and AT-Style Keyboard Cable Replacement 2-7
316X- and AT-Style Keyboard PCB Replacement 2-7
Removing and Replacing Assemblies in the
Terminal Module 2-9
Remov ing the Terminal Enclosure 2-9
Replacing the Fuse 2-10
Removinng and Replacing the Terminal PCB 2-11
Removing and Replacing the CRT/Yoke Assembly 2-13
Remov ing and Replac ing the Yoke 2-15
Replacing the Terminal Enclosure 2-16
Discharging the Anode 2-16
OVERVIEW
This chapter explains how to remove and replace assemblies and
components in both terminal modules. For purposes of
orientation, "front" is the monitor face, and "back" is the rear
panel and power cord location.
The terminal consists of two major modules (see Figure 2-1):
o
o
Terminal
Keyboard
The terminal module includes the CRT/yoke
assembly and the terminal PCB. The terminal
PCB holds all control logic, power supply
circuitry, and the circuitry to amplify and
display horizontal, vertical, and video
signals on the CRT screen.
The keyboard module includes the keyboard PCB
and the keyboard cable.
2-1