Table of Contents
Advertisement
(6)
REPLACING AUDIO TRANSFORMERS
The audio transformers
of
Radiola
16
are built together
as
a
unit.
replacement the following procedure should
be
used.
1.
Remove chassis from cabinet as
described
in
Part
II,
Section
1.
2.
The audio transformer
case
is
held by
metal
tabs,
bent over
on
the
the chassis.
Turn
these up to release the
transformer
assembly.
3.
Tag
and unsolder all leads.
4.
Place the
new
transformer
assembly
in
position occupied
by the old
frame
by
bending over metal tabs
that
hold
it
in
place.
5.
Solder all leads
in
place
as
indicated
by
tags attached.
The
col
these
connections
is shown in
Figure
10.
6.
Replace chassis assembly
in
cabinet.
(7)
REPLACING CONDENSER DRIVE
CABLE
In making a
upper
side of
and fasten
to
or
scheme
of
The condenser
drive cable of
Radiola
16
is
made of
phosphor
bronze and
is
very
rugged.
If
replacement
becomes
necessary the following procedure should
be
used.
1.
Remove chassis from cabinet as described
in
Part II,
Section
1.
Place chassis
on
table
in
normal position with controls to the
front.
2.
Release the cable
adjusting
screw
and clamp, and
remove old cable from
large
drum and grooved drums completely.
3.
Starting
from the
rear
grooved drum place
eye
of cable over pin,
wind on
three
complete
turns,
and then bring cable up to large drum.
I'he
pin
in
the grooved
drum should
be
nearly horizontal and
on
the right
side of
the drum.
4.
Now
bring
cable over the
large drum.
Turn
drum
so
that
cable
adjusting
screw
is
on
top.
Pass
cable over groove until
point
is
reached
where
there
is
a
slot
in
the drum for passing cable to the
other
side
of drum to the
other track.
5.
Follow
on.around
other track
in same
direction until point
is
reached
where
cable
is
directly
above
front
grooved drum.
6.
Starting
on
the
third
groove back from the
front
of the grooved
drum
wind on
two
and
a
half turns and
slip
eye
over pin.
The
cable
is
now
in
the
correct
position, although probably slack.
The
cable
adjusting
screw and clamp
that
were
previously
removed to allow the
cable to pass along the groove
are
replaced.
By slipping the clamp over the cable and
gradually turning
up
on
the cable
adjusting
screw, the cable may
be
tightened until
there
is
no
last
motion
in
any of the controls.
Care should
be
taken not
to
take up
too
much as the cable may
be
stretched or possibly broken.
(8)
REPLACING DIAL SCALE
After considerable
use
a dial scale may become
dirty
or
illegible
and a
new
scale
desired.
A
step
by
step procedure
of making replacement follows:
1.
Open lid of cabinet of
Radiola.
2.
Turn
dial
so
that
the
two screws
that
hold the dial
in
place are
on
top.
3.
Remove screws, washer and
nuts
that
hold dial
in
place.
4.
Replace
old dial with
new one
and replace screws,
but
do
not tighten.
5.
Examine
new
dial from
front
of
Radiola to
see
that
numbers
on
dial are not
upside
down
and the maximum and minimum figures
are
in
their correct
places.
6.
Tighten
screws
holding dial
in
place and
close lid of
cabinet.
19
Advertisement
Table of Contents
