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Wyse WY-50 User Manual

Wyse WY-50
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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

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Wyse WY-50 Specifications

General IconGeneral
CategoryTerminal
ManufacturerWyse
ModelWY-50
Display TypeCRT
Resolution80x24 characters
Character SetsASCII

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