Technics SU-Z35 Service Manual

Mi CONTENTS
Page
Page
SAFETY
PRECAUTION
...........2000005
Estiaatant
2
RESISTORS
&
CAPACITORS
.............00000.
10
PROTECTION
CIRCUITRY
............-0..-00005
2
BLOCK
DIAGRAM
...............c0eceeee
11,
12
LOCATION
OF
CONTROLS
..........
00.000
e
ee
3
SCHEMATIC
DIAGRAM...................
13
~15
BEFORE
REPAIR
AND
ADJUSTMENT..............
3
REPLACEMENT
PARTS
LIST
...........00.0ce
16
DISASSEMBLY
INSTRUCTIONS.
...............
4,5
EXPLODED
VIEW
............-
0c
ce
eeeaee
17,
18
POWER
AMPLIFIER
PROTECTION
............-e0005
6
PRINTED
CIRCUIT
BOARDS/WIRING
CONNECTION
DIAGRAM
.........-0..002005
as
7~9
Hi SAFETY PRECAUTION
ORWN =
. Before servicing, unplug the power cord to prevent an electric shock.
.
When
replacing
parts,
use
only
manufacturer's
recommended
components
for
safety.
. Check the condition of the power cord. Replace if wear or damage is evident.
.
After
servicing,
be
sure
to
restore
the
lead
dress,
insulation
barriers,
insulation
papers,
shields,
etc.
Before
returning
the
serviced
equipment
to
the
customer,
be
sure
to
make
the
following
insulation
resistance
test
to
prevent
the
customer
from
being
exposed
to
a
shock
hazard.
INSULATION RESISTANCE TEST
1,
2.
3.
Note:
Unplug
the
power
cord
and-short
the
two
prongs
of
the
plug
with
a
jumper
wire.
Turn on the power switch.
Measure
the
resistance
value
with
ohmmeter
between
the
jumpered
AC
plug
and
each
exposed
metal
cabinet
part,
such
as
screwheads
antenna,
control
shafts,
handle
brackets,
etc.
Equipment
with
antenna
terminals
should
read
between
3MQ
and
5.2MQ2
to
all
exposed
parts.
(Fig.
A)
Equipment
without
antenna
terminals
should
read
approximately
infinity
to
all
exposed
parts.
(Fig.
B)
Some
exposed
parts
may
be
isolated
from
the
chassis
by
design.
These
will
read
infinity,
Antenna
terminal
Exposed Exposed
metal
metal
part
part
Ohmmeter Ohmmeter
(Fig. A)
Resistance = 3M2—5.2MQ
(Fig. B)
Resistance = Approx oo
4.
If
the
measurement
is
outside
the
specified
limits,
there
is
a
possibility
of
a
shock
hazard.
The
equipment
should
be
repaired and rechecked before it is returned to the customer.
M@ PROTECTION CIRCUITRY
The
protection
circuitry
may
have
Operated
if
eigher
of
the
following
conditions
is
noticed:
®
No
sound
is
heard
when
the
power
is
turned
on.
@ Sound stops during performance.
The
function
of
this
circuitry
is
to
prevent
circuitry
damage
if,
for
example,
the
positive
and
negative
speaker
with
an
impedance
less
than
the
indicated
rated
im-
pedance
of
the
amplifier
are
used.
If this occurs, follow the procedure outlined below:
1. Turn off the power.
2.
Determine
the
cause
of
the
problem
and
correct
it.
3.
Turn
on
the
power
once
again
Note:
When
the
protection
circuitry
functions
the
unit
will
not
operate
unless
the
power
is
first
turned
off
and
then
on
again.

Technics SU-Z35 Specifications

General

Brand	Technics
Model	SU-Z35
Category	Amplifier
Language	English