Table of Contents
Advertisement
general maintenance information
3.2
PRINTED CIRCUIT BOARD LAYOUT AND COMPONENT IDENTIFICATION
Wyse utilizes an X-Y coordinate system on all printed circuit
boards.
This aids the technician in locating integrated circuits
on the PCB which were referenced on the schematics.
A brief
explanation of the coordinate system follows.
3.2.1
PRINTED CIRCUIT BOARD
X-Y
COORDINATE SYSTEM
Along the length of the WY-50 microcomputer board runs a set
of alphabetic coordinates (A, B, C etc.), and along the
width runs a set of numeric coordinates (1, 2, 3 etc.).
These coordinates form an X-Y grid so that ICs can be
located rapidly.
In addition, next to each IC, its X-Y
coordinate is printed on the silkscreen.
This allows rapid,
error-free identification of components.
Refer to Figure
3-2 for an example of coordinate identification.
TCOM CONNECTORS
------.~--~
r
.AUX.
MODEt'/ '
KEYBO,A.RD
CPU
I. C. 3A (EXAMPLE)
Figure
3-2.
MICROCOMPUTER PCB
POVVEH
& VIDEO
3-3
Advertisement
Table of Contents
