Overview; Before You Start; Terminal Modules; Safety - Wyse WY-30 Maintenance Manual

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.
Figure
2-1
Terminal Modules
Termlnal--'"
"h~-
Keyboard
BEFORE YOU START
Safety
Warning--This terminal contains high voltage. Don't attempt to
service the terminal without taking all the precautions necessary
to work with high voltage, including the following:
o If you must open the terminal for any reason, turn off the
power, disconnect any communications cables, and unplug the
terminal.
2-2