AUTO ARC 120 - SECTION 5 - MAINTENANCE & TROUBLESHOOTING; ROUTINE MAINTENANCE PROCEDURES; OVERLOAD PROTECTION AND FUSE LOCATION

SECTION
5
MAINTENANCE
& TROUBLESHOOTING.
a
WARNING
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live
electrical
parts.

Turn
Off
welding
power
source,
and disconnect
input
power
before
inspecting, maintaining,
or
servicing.
HOT PARTS
can cause
severe
burns.

Allow
cooling
period
before
maintaining
or
servicing.
MOVING
PARTS
can
cause
Injury.

Keep
away
from
moving
parts.

Keep
away
from
pinch
points
such
as
drive
rolls.
ance
to
be
performed
only by
qualified
swarn8.2 2/93
A.
Motor
Fuse
Fl
Located
behind fan.
2
Fuse
Fl
(See
Parts
List
For
Rating)
Pull
fuse from fuse
holder
on
PCi.
To
reinstall,
push
fuse
into
fuse
holder.
Reinstall
wrapper,
and
latch door.
5-1.
Routine
Maintenance
Turn
Off
all
power
before
maintaining.
3
Months
Trigger
Cord
-
Gun
Cable
5-2.
Overload Protection
Figure
5-1.
Maintenance Schedule
a
CAUTION
READ
SAFETY
BLOCKS
at
start
of
Section
5
before
proceeding.
STATIC ELECTRICITY
can
damage
parts
on
circuit boards.

Put
on
grounded
wrist
strap
BEFORE
handling
boards
or
parts.
fwam5.1
9/91
Turn Off
and
unplug
unit.
Unlatch
door
and
remove
door/wrapper.
1
Circuit
Board
PCi
Tools Needed:
~
3/8
in
Figure
5-2.
Fuse
Fl Location
5T-150
114/ST-149
327
OM-15i
015
Page
10