Technics SU-Z55 EK - Page 12

i SCHEMATIC DIAGRAM
(This schematic diagram may be modified at any time with the
development of new technology.)
*The part No. of transistors, IC and diodes mentioned in the schematic
|H|
diagram
stand
for
production
part
No.
Regarding
the
part
No.
with
SPEAKER TERMINAL @ mark, the production part No. are different from the replacement
part No. Therefore, when placing an order for replacement part, please
use the part No. in the replacement parts list.
| Level Meter
lo~t2a Lch level segment
Ipwt2b Reh level segment
POWER AMPLIFIER, MUTING AND POWER SUPPLY
1c301 D301, 302 Q301, 302 1C302
AN7062 MAI62A 250992 SVISTK2038B
VOLTAGE AMP DRIVER 2ch POWER AMP L
Ee ae Notes:
33 i : ; M i eh aie, ;
a309
FF
a3
NF
Line
7
/
7
1.
This
is
basic
circuit
diagram
(For
continental
Europe)
of
this
unit.
==
o:3
;
:
oY
ime
2.
Regarding
the
circuits
to
be
changed
in
the
basic
circuit
diagram
(For
Power
Amplifier
:
:
a
1
SPEAKERS
:
_
:
|
continental
Europe)
and
related
areas
([EGA],
[XL],
[XA]}
and
[PC]
les
20s
5680",
182%
A
s
eee
refer
to
the
booklet
contain
manual
(Order
No.
SD83062525C8—A).
SVIBAGI4G
#
fool
A
A
ie
|
3.
$1-1
~
$1-3
:
Input
selector
switch
in
“phono”
position.
(COMPARATOR
)
at
3s
Rare
g
|
cto
(S1—1
:
phono,
$1—2
:
tuner,
$1—3
:
Aux/
|
Ao
J
:
8
Slee
el
CD/Video)
|
2
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z
a
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8
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God
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7]
G7
Bed
2]
Gea
(2)
Bed
Gale]
Gad
2
4.
$2—1
~$2-2
:
Tape-monitor
selector
switch
in
‘‘source
|
=
=
ele
Lp
1301
1¢302
Protect
Position.
~
3
3 gle
o]
33
cog
eg
G52)
Geol
GF)
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Be.)
Reece
<—
38.4)
aa oO}
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o] Si
338 —P-_O—@—-O-O—-O-O—-B
©—9-O—D—-O@—)-O—G
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4
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tape
1,
S2—2
:
tape
2)
6
6
q
ww
td
-
2
cdte]
An3ee
4
5.
$3
:
Loudness
switch
in
“off”
position.
|
-
3
BT
sual
2
zl
26}
[
L3oe
A
6.
S4—-1
~
S$4-2
:
Speaker
switch
(main)
in
on’
position.
S204
+
B
7
*
“a
u
cae
i
320
:
Speaker
switch
(remote)
in
“off”
position.
i¢
a
4
:
ae
fae
3-
Fs
(S4—1
:
main
speaker,
S4—2
:
remote
spe-
car
Nive
Rech
FL
ORIVER
=
(COMPARATOR
}
aker).
j
4
7.
$5
: Power
source
switch
in
“‘on’’
position.
“ee
_
!
|
:
ri
:
cate
8.
S6
([XA]
and
[PC]
area
:
Voltage
selector
switch
in
“240V"
position.
7
R502
:
‘
3
=
_
4
:
8
Bae
E
only)
(Refer
to
booklet
contain)
10V
(Segment
Light
up)
S
1
|
3
—O1V
|B!
;
120V
<—
110V
<->
220V<—>
240V
wee
9.
[__]
Indicated
voltage
values
are
the
standard
values
for
the
DC
Oo:
a
7
s
.
.
.
:
tester
(h
i
roun
i
a
Sen
Baiahics
|
S|
;
:
aaa
eae
electronic
circuit
(high
impedance)
with
the
ground
point
taken
SVDSLV56VC3,
‘
="
4
z
as
standard.
Therefore,
there
may
exist
some
errors
in
the
voltage
volues,
INPUT
INDICATOR
Bar
Switch
:
Muting
a
0502~
506
i
j
i 1
i
SvOsV
seca
=
—_
aa
I
depending
on
the
internal
impedance
of
the
DC
circuit
tester.
MUTING
&
PROTECTION
\
Se
LEVEL
METER
ie
TI
20:
Fosoe.aos
|
Power
Supply
I
35
ee
.
fone
SSS
2SA
1015
250592
ANC
2)a(2
24
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Components
identified
by
A mark
have
special
characteristics
important
NE
CONTROL
1C.40)
|
[oven
Load
0€T}-{wuTing]
SWITCHING
M
REGULATOR
RERTE a
‘
‘
C3
(2)
Bg
Beg
Bea
Fog
G7)
G9)
3
er
oy
for
safety.
When
replacing
any
of
these
components,
use
only
manufacture-
.r-O—-O)
+)
-O—-O©-—-F
isk
0403
E
main
B
ie
Tp
*esian
3
be
=
ass
330
ta
G0
E
free
te
r’s
specified
Parts.
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at
(et
labd
12 EL)
$8)
QL
.
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al
-
q]
i
!
;
11,
Phono
signal
lines of
left
channel.
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Jak
S8h
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cay
si
|
|
ls
Sa
ge
Gt
:
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;
JME
CONTROL
H
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ig
er
FER
Fs
el
Feloao:
me
wi
ere
Ll
its
Laks
yor
a
E
12.
NF
Signal
lines
of
left
channel.
veens
|
|_
$3
Ss
Tile
[yo
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LP
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:
re
.
—~
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5
|
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A
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tih3
FIR
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pepe
encoun
13,
>
Positive
(+B)
voltage
line.
b
4
gs
est]
&
t]8
A+
ot
.
:
4,
)
oao2
STs
Peaeerer
alg:
#t
G:
ie
14, =
=>
Negative
(—B)
voltage
line.
gee
|
!
Fs.
7
d
fA.
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i
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sey!
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last,
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HEADPHONES
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8
2
:
:
D401
D402
0403,
404
0405
~
408
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pstrtriorterecie
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repose
Rpts
D
Veo
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8
3
maiso
SVOMZ312C
SVDMZ316
sv0s2v20
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Tekh
se
5
gg
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A
g
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me
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l2V
ZENER
16V
ZENER
RECTIFIER
Py Ree
A
=e
=8
g
:
SPEAKER
[
i
ine
Seals
SWITCH
4
fasten
Son
/ y
J:
4
;
5
R
i
3
ee
:
3
(BALANCE)
;
E
=
=
£330
E
a
on
A
R40.
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ccd
/
= 1
GBs!
=
‘
os
Ze
;
a
;
aoe
Beer
Ge
GS
a
=
Sahel
ona
FL
Tone
Bass
“6
=
2
2
Ey
dase
isons
Wane
G2
=
-
a
®
Bar Switch Treble/ IH ee
asf