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Simpson 1000 - Fuse Failure

Simpson 1000
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MAINTENANCE
FUSE
FAILURE
When
the
primary
winding
of
the
power
transformer
becomes
overloaded,
the
fuse
in
series
with
the
power
input
will
blow
to
protect
the
tube
tester
from
any
further
damage.
There
are
three
possible
reasons
for
fuse
failure:
1.
It
can
indicate
that
you
have
set
the
tube
tester
controls
incor-
rectly;
2.
It
can
indicate
that
you
have
applied
voltages
to
shorted
elements;
3.
It
can
indicate
that
a
short
circuit
has
developed
within
the
circuits
of
the
tube
tester.
If
the
fault
is
a
short
circuit
in
the
tester,
use
the
schema-
tic
diagram,
figure
4,
to
locate
and
eliminate
the
source
of
trouble.
The
fuse
is
a
1
ampere
type
3AG.
It
is
mounted
in
a
fuse
holder
through
the
front
panel.
To
remove
it,
unscrew
the
cap
of
the
holder
and
the
fuse
will
lift
out
with
the
cap.
Replace
this
with
another
1
ampere
type
3AG
fuse.
Do
not
use
a
higher
ampere
rating
fuse
for
this
replacement.
TROUBLESHOOTING
YOUR
ROLL
CHART
SPRINGS
There
is
a
small
flat
spring
inside
the
base
of
the
roll
chart
mounting
bracket.
This
spring
presses
up
against
the
bottom
of
one
gear
wheel
to
hold
the
chart
in
any
position
in
which
you
set
it.
If
the
spring
has
been
bent,
it
may
interfere
with
fast
action
in
your
rotation
of
the
wheels
to
find
tube
information,
or
it
may
have
been
pressed
down
so
that
it
does
not
place
any
tension
against
the
wheel
and
the
chart
does
not
tend
to
stay
in
a
position
to
which
it
has
been
set.
Reset
the
spring
as
necessary
to
obtain
the
slight
38

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