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c.
Slide
spacers
onto new
meter
support.
d.
Push
meter
into
socket
with
meter
supports
protruding
through
to
rear
of
PC4.
e.
Reinstall
lock
washers
and
nuts
to
secure
meter
to
board.
Do
not
overtighten
nuts
or
meter
may
be
damaged.
6.
To
install
replacement
display
board,
carefully
line
board
up
with
front
panel
openings
for
meters
and
LED’s.
7.
Reinstall
securing
screws.
8.
Reconnect
PLG2O
and
PLG24
to matching
receptacles
on
new
PC4.
9.
Reinstall
unit
top
cover.
B.
Motor
Board
PC2
Replacement
1.
Remove
unit
top
cover.
2.
Remove
securing
screw
and
unlatch
standoff.
3.
Gently
pull
board
from
receptacle
RC5.
4.
Insert
new
board
into
RC5.
5.
Reinstall
securing
screw
and
latch
standoff.
6.
Reinstall
unit
top
cover.
C.
Replacement
Procedure
For
Remaining
Boards
1.
Remove
unit
top
cover
and
locate
board.
2. Disconnect
plug(s)
from
board.
3.
Unlatch
standoffs
and
ing
rail.
slide
board
out
of
retain-
WARNING:
4.
Slide
new
board
into
retaining
rail
and
latch
stan-
doffs.
5.
Connect
plug(s)
to matching
receptacle(s)
on
new
board.
6.
Reinstall
unit
top
cover.
5
-5.
TROUBLESHOOTING
CHART
ELECTRIC
SHOCK
can kill.
•
Do
not
touch
live electrical
parts.
•
Shut
down
unit,
welding
power
source,
and
robot
and
disconnect
,nput
power
employing
‘lockout/tagging
procedures”
before
internally
inspecting
or
servicing.
Lockout/tagging
procedures
consist
of
padlocking
line
disconnect
switch
in
open
position,
removing
fuses
from
fuse box,
or shutting
off
and
red-tagging
circuit
breaker
or
other disconnecting
device.
MOVING
PARTS can
cause
serious injury.
•
Keep
clear
of
moving
parts.
HOT
SURFACES
can
cause
severe
burns.
•
Allow
cooling
period
before
servicing.
Troubleshooting
to
be
performed
only
by
qualified
per
-
sons.
It
is
assumed
that
the
computer
interface
was
properly
installed
according
to
Section
2
of
this
manual,
the
operator
is
familiar
with
the
function
of
controls,
the
unit
was
working
properly,
and
that
the
trouble
is
not
related
to
the
welding
process.
The
following
chart
is
designed
to
diagnose
and
provide
remedies
for
some
of
the troubles
that
may
develop
in this
unit.
Use
this chart in
conjunction
with
the
circuit
diagrams
while performing
troubleshooting
procedures.
If
the
trouble
is
not
remedied
after
performing these
pro
-
cedures,
the
nearest Factory
Authorized
Service
Sta-
tion
should
be
contacted.
In
all
cases
of
equipment
malfunction,
the
manufacturer’s
recommendations
should
be
strictly
followed.
TROUBLE PROBABLE CAUSE REMEDY
Unit
does
not
operate.
Fuse
Fl
open.
Check
Fl,
and replace
if
necessary
(see
Section
5-2). Correct overload
problem before
continuing
operation.
Circuit
breaker
CB1
tripped.
Check
CBl,
and reset
if
necessary.
Correct
overload
problem
before
continuing
operation.
No
meter
display.
Meter
not working.
Use
check
points
on
display
board
PC4
to
deter
mine
if
power
is
available
to
meter
(see
Section
5-3).
If
check
points
are
okay,
replace
meter
(see
Section
5-4).
Display board
PC4
not
working.
Use
check points
to
determine
if
power
is
available
(see
Section
5-3).
If
check points
do
not
test
okay,
replace
PC4
(see
Section
5-4).
OM-882
Page
10