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a)
Visually
inspect
unit
for
broken
wires,
damaged
components,
loose
connections
and
other
obvious
defects.
b)
Make
certain unit
is
connected and
operated
according to
Owners Manual
or
instruction
label
located
on bottom
of
unit.
If
possible,
check
associated
equipment
such
as
cables,
battery
or
amplifier
used with the
unit.
c)
Connect
9
volt
dc
power
source to battery
clip
and
turn
DRIVE
and
VOLUME
pots
to
maximum
output
level.
d)
Apply
a
200
millivolt
peak-to-peak
sine
wave
at a
frequency
of
500
Hz
to
AXE
jack
J2
and
observe
dc
voltage
levels
and
ac
signal levels as
shown on
the schematic
diagram
using
an
oscilloscope.
NOTE
A
high
impedance
voltmeter
(1
megohm
per
volt
or
higher)
may
be
used
to
measure dc
voltage
levels.
Note
that
voltage
levels
and waveforms
displayed
on
the
schematic diagram
are
not
absolute values
as
readings
may
vary
between
units.
e)
Once
the
problem
is
localized,
check
the
suspected
part
by
direct
substitution
if
possible.
Otherwise
use
a
voltmeter or
oscilloscope to deter-
mine
the malfunctioning
part.
NOTE
All
replacement
parts
may
be obtained
from
Moog
Music,
Inc.
However,
many
standard
electronic parts
may
be obtained
locally
in
less
time than
is
required to
receive
them
from
Norlin.
When
purchasing
replacement
parts
locally,
check
the parts
list
for
proper
value,
tolerance
and
rating.
REASSEMBLY
a)
Reassemble Maestro
Fuzz
in
reverse
order of
disassembly
referring
to the
exploded
view (Figure
1
and
noting the following additions.
b)
Finger
tighten
nuts (13) securing printed
circuit
board assembly
(15) to
housing assembly (26)
to
allow printed
circuit
board assembly
to
fit
into
slots
of
end
caps
(10).
After
both end
caps
are
installed,
tighten
nuts
(13).
c)
Connect
three pin
connector
(24) to printed
circuit
board assembly
(15)
making
certain
black
wire (pin 1)
is
on
left
side
of
connector
at
bottom
of
printed
circuit
board.
d)
Slip
dial
assemblies (4
and
5)
on
rotary
pot
shafts
(left dial
assembly
(4)
marked
"L"
between
"9" and "0"
and
right dial
assembly
(5)
marked
"R"
between "9" and "0") and
turn
each
dial
assembly
full
counterclockwise
and then
clockwise.
e)
Turn
right dial
assembly
full
counterclockwise.
Holding
dial
assembly steady
at
"0,"
insert
small
screwdriver
in
hole
at
center of
dial
assembly and
turn
pot
shaft
full
counterclockwise, then approxi-
mately
five
degrees clockwise to
relieve strain
on
pot
shaft.
Tighten
setscrew
(3).
f)
Turn
left
dial
assembly
full
clockwise.
Holding
dial
assembly steady
at
"0,"
insert
small screwdriver
in
hole
at
center of
dial
assembly and
turn pot
shaft
full
clockwise,
then
five
degrees counterclockwise
to
relieve strain
on
pot
shaft.
Tighten
setscrew
(3).
g)
Rotate both
dial
assemblies
making
certain
their
range
is
from "0"
to
"9."
REPLACEMENT PART
LISTS
ORDERING
The
following
lists
specify parts
available
from
Moog
Music,
Inc.,
Customer
Service
Department,
2500 Walden
Avenue,
Buffalo,
New
York
14225,
(716)
681-7242.
Please specify
the
unit
name, model,
serial
number,
part description,
electrical
reference
designator
if
applicable
and
part
number
when
ordering.
3
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