Fender Super Twin Owner Manual - Page 7

Panel, Functions, Corrective, Check - schematic

Page 7 highlights

REAR PANEL FUNCTIONS SPEAKER JACK Connects internal speakers to amplifier. OUTPUT LINE/RECORDING JACK Permits direct connection to recorders, P.A. systems or amplifiers, with input impedances of 200 ohms or more. OUTPUT TUBES MATCHING This control makes it unnecessary to use matched power output tubes for optimum performance Best balance is obtained by setting the OUTPUT LEVEL to "1" and adjusting for minimum hum level. Ordinarily, no adjustment should be required unless the output tubes are changed. EQUALIZER PEDAL JACK Used to connect EQUALIZER (EQL) switch on foot pedal to amplifier for instant on/off control. Use shielded lead plug. VOLUME BOOST & DISTORTIOI PEDAL JACK Used to connect VOLUME BOOST switch (slide) and DISTORTION (DST) switch (both on foot pedal) to amplifier for instant on/off control. Use unshielded lead plug. HUM BALANCE After the "GROUND SWITCH" has been positioned to minimum hum, the hum balance may be used to further reduce hum. This control should not need adjustment unless tubes or other components are changed. A.C. ACCESSORY OUTLET (120 V AC, 60 Hz) (Load limit 250 Watts) This socket is provided as a convenience outlet for any A.C. accessory. FUSE 61/4 Amp 125 Volts CAUTION: Disconnect amplifier A.C. plug from outlet before changing fuse. Remove fuse by pressing in and unscrewing cap counter-clockwise. Replace only with Littlefuse No. 3136.25 or Bussman fuse No. MDL 6'/4. GROUND SWITCH Gives player control of polarity. Positions "A" and "B" ground to each side of the line respectively. The "OFF" position disconnects all but the third line chassis ground. Try each position to find minimum hum condition. CORRECTIVE CHECK LIST If your amp is set up but does not function, check the following items: Is the amp power supply cable plugged into the wall? Is there power at the wall outlet where the amp is plugged in? Is the speaker plugged into the amplifier speaker jack? Are the tone control knobs turned up above 4? Is the volume control on your instrument turned up? Is the fuse good? If, after checking all of the above, the system is still not performing correctly, consult your authorized Fender Service Dealer. CARE OF VINYL COVERING If the vinyl covering and handles require cleaning, use a mild soap and warm water solution, rinse with a damp cloth, and buff dry with a terry cloth. This will restore the original luster. REPLACEMENT PARTS If the amplifier should require new parts, they will be replaced under the term of the warranty stated in the back of this manual. Your authorized Fender Dealer will have parts in stock, or he can obtain them quickly for you. If a tube should need replacement and no Fender Dealer is available, an electronic store can usually supply the tube required, but not under the warranty. The schematic furnished with this manual will be helpful at that time. Fender Musical Instruments furnishes warranty service only through authorized Fender Dealers. 4

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REAR
PANEL
FUNCTIONS
CORRECTIVE
CHECK
LIST
SPEAKER
JACK
Connects
internal
speakers
to
amplifier.
OUTPUT
LINE/RECORDING
JACK
Permits
direct
connection
to
re-
corders,
P.A.
systems
or
amplifiers,
with
input
impedances
of
200
ohms
or
more.
OUTPUT
TUBES
MATCHING
This
control
makes
it
unnecessary
to
use
matched
power
output
tubes
for
optimum
performance
Best
balance
is
obtained
by
setting
the
OUTPUT
LEVEL
to
"1"
and
adjusting
for
minimum
hum
level.
Ordinarily,
no
adjustment
should
be
required
unless
the
output
tubes
are
changed.
EQUALIZER
PEDAL
JACK
Used
to
connect
EQUALIZER
(EQL)
switch
on
foot
pedal
to
amplifier
for
instant
on/off
control.
Use
shielded
lead
plug.
VOLUME
BOOST
&
DISTORTIOI
PEDAL
JACK
Used
to
connect
VOLUME
BOOST
switch
(slide)
and
DISTORTION
(DST)
switch
(both
on
foot
pedal)
to
amplifier
for
instant
on/off
control.
Use
unshielded
lead
plug.
HUM
BALANCE
After
the
"GROUND
SWITCH"
has
been
positioned
to
minimum
hum,
the
hum
balance
may
be
used
to
further reduce
hum.
This
control
should
not
need
adjust-
ment
unless
tubes
or
other
com-
ponents
are
changed.
A.C.
ACCESSORY
OUTLET
(120
V
AC,
60
Hz)
(Load
limit
250
Watts)
This
socket
is
provided
as
a
convenience
outlet
for
any
A.C.
accessory.
FUSE
6
1
/
4
Amp
125
Volts
CAUTION:
Disconnect
amplifier
A.C.
plug
from
out-
let
before
changing
fuse.
Remove
fuse
by
pressing
in
and
unscrewing
cap
counter
-clockwise.
Replace
only
with
Littlefuse
No.
3136.25
or
Bussman
fuse
No.
MDL
6'/4.
GROUND
SWITCH
Gives player
control
of
polarity.
Positions
"A"
and
"B"
ground
to
each
side
of
the
line
respectively.
The
"OFF"
position
disconnects
all
but
the
third
line
chassis
ground.
Try
each
position
to
find
minimum
hum
condition.
If
your
amp
is
set
up
but
does
not
function,
check
the
following
items:
Is
the
amp
power
supply
cable
plugged
into
the
wall?
Is
there
power
at
the
wall
outlet
where
the
amp
is
plugged
in?
Is
the
speaker
plugged
into
the
amplifier
speaker
jack?
Are
the
tone
control
knobs
turned
up
above
4?
Is
the
volume
control
on
your
instrument
turned
up?
Is
the
fuse
good?
If,
after
checking
all
of
the
above,
the
system
is
still
not
perform-
ing
correctly,
consult
your
authorized
Fender
Service
Dealer.
CARE
OF
VINYL
COVERING
If
the
vinyl
covering
and
handles
require
cleaning,
use
a
mild
soap
and
warm
water
solution,
rinse
with
a
damp
cloth,
and
buff
dry
with
a
terry
cloth.
This
will
restore
the
original
luster.
REPLACEMENT
PARTS
If
the
amplifier
should
require
new
parts,
they
will
be
replaced
under
the
term
of
the
warranty
stated
in
the
back
of
this
manual.
Your
authorized
Fender
Dealer
will
have
parts
in
stock,
or
he
can
obtain
them
quickly
for
you.
If
a
tube
should
need
replacement
and
no
Fender
Dealer
is
available,
an
electronic
store
can
usually
supply
the
tube
re-
quired,
but
not
under
the
warranty.
The
schematic
furnished
with
this
manual
will
be
helpful
at
that
time.
Fender
Musical
Instruments
furnishes
warranty
service
only
through
authorized
Fender
Dealers.
4