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Technics SL-P250 - Page 46

Technics SL-P250
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12
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SCHEMATIC
DIAGRAM
D
|
D/A
CONVERTER/AUD!O
CIRCUIT
ov
Sms.
2V/DIV
‘Sms.
2V/DIV
1401
T
arian
Sr
teM
Of
4.8V
|
310
22K
OO!
4.8V
GND
5.0V
DMUTE
7
0
MDATA
QI)
TRV-F
loms.2v/DIV
O.2ms.2V/DIV
zeus
@*Y
MCLK
TRV-R
Ploy
MLD
adcb
[i
rower
surety
circuit
Qi3
cil
2801862
LM2940
REGULATOR
REGULATOR
77
<A
fool
49v
77M
STO
16
©
ost
=>
(6)
©
|
CNIL
[AC
13.8V
]
4.9V
$B
1c
13
BA4558FT
STABILIZER
cav
Al
ae
2
C13
10V100
©
© ©
©
©
Oo
cl4
10V100
42SB1240
REGULATOR
ov
<i
-86v
<A
ry
<t
“115V
Ql2
2SB
1238
REGULATOR
|
fons
15,17,
21,22]
ISR35200V
Ice7I
MS2
(18.
HEADPHONES
AMP
ass!
,
882
2S
D1450
MUTING
(gy)
o6v
re79
|
2.2K
DIG
MA4330M
Px
|
Q
12
C30
R16
1K
324
R87
100KA
V7
018
MA4062|
(PHONES
V'
LEVEL)
CN406
BCNGOGH
CN6O7#§
CN67I
ae6)
2SC3311
REGULATOR
i]
Jy
J
[OOOCODO
[OROKCHOKONS)
EERE
S
SOOO
Eee
SOSOSO
ae62
i.
9
2SA1309
Sms.2V/DIV
Pio
toms:
2v/01v
pes
REGULATOR
azedt
R851
D852
|
2
m
QV
(2.
cf
Ploy
'kHz0dB
3
\soves
eam
war
1OV
1c805
NJM45
2
g
805
47P
BUFFER
AMP.
d
47V
Q85i
6
Q8s2
1c301
°
N
DTAI2Z4EST
DTCI24EST
a853
MN66
17
225:
2/0.
mare
Eee
SS
SWITCHING
SWITCHING
DTAIIGEST
DIGITAL
SIGNAL
a1o/R/L
h
.
MUTING
CONT.
E
PROCESSING
E
a
ee
1cgo2
i809
|soves
DAT/1PBYTE
G5)
,
ov
25V33
-5.0V
0
pa6
/1PSEL
:
Sere
Be
5ys.2V/DIV.
b
A
®
ov
441C803
~2.0V
ul
E
ore
eran
ai
mala
Play
/
1kH2,068
ELE
ov
32
2
SOps.2v/01vV
|
RIESE
UIE
DREISER
TRER
SOIR
IS
EIS
URONSNER
TREN
—ery
|]
PT
R808
pps
NGITAL
Fa
Be
estent
2)
3
|
803,004
5.0V
d
-
°
2SD1450
abcdefghijkimnoparsty
oy
en
ov
ory
|
LLY
La
et
eeSRGS
sr
vata
(|
Se
nme
erences
Sil
2ps.2v/01V
\92ts(8.4672MHz)
s|
3
Gmibe
Teststssecsamnz)
“YS
SS
LT
[ion
Lee
ae
a
L
#|
8
Play
5.dv
§
x
°
&ss
2ps.
2vAlV
:
Icso3
cava
|
RE20
S
1c302
:
eeeta
Ses
aoa
a
scence
Sas
egaearVAA
cactus
commer
eam
oe)
CXK58
16M
E
RBI2
47K
®
830
R824
eis
1c302
6
16K
RAM
Ra58
'6v22
120
alas
Aa
ca0s
47P
1K
&)
=
;
ea
yt
SoAL)
ov
J
Males
Be"
;
1C803
(-1.8V)
sega
ny
MAN
ons
49
£
LM833M
6.0Vp-p
Q405
gp
2408
g-4t245
COMPARATOR
;
ge
BT
Play
|
DIG
heaesr
I
DTCI2Z4EST
DTAI24EST
1cB04
penteri
ardent
mee
=
SWITCHING
SMUT
CHING
R840
330
NJM4560M
SWITCHING
LOW
PASS
FILTER
aia
BUFFER
AMP
AC
120V
60Hz
For(M),(MC)
areas
©)
Lch
(This
schematic
diagram
may
be
modified
at
any
time
with
development
of
new
technology.)
Notes:
°S1
$2
:
Power
switch
in
“on”
position.
:
Voltage
selector
switch.
(For,
[XA],
[XB],
[PA],
[PE]
and
[PC]
only.)
:
Disc
holder
open/close
detection
switch.
:
Disc
holder
open/close
detection
switch.
:
Open/close
switch.
:
Stop
switch.
:
Pause
switch.
:
Play
switch.
:
Repeat
switch.
:
Program
switch.
:
Backward
search
switch.
:
Forward
search
switch.
:
Backward
skip
switch.
°
$610
:
Forward
skip
switch.
$611
:
Preset
edit
play
switch.
°
$612
:
Time-mode
select
switch.
©
$613~623:
Numeric
switch.
(0~9,
+10)
¢
The
voltage
value
and
waveforms
are
the
reference
voltage
of
this
unit
measured
by
DC
electronic
voltmeter
(high
impedance)
and
oscilloscope
on
the
basis
of
chassis.
Accordingly,
there
may
arise
some
error
in
voltage
values
and
|
waveforms
depending
upon
the
internal
impedance
of
the
tester
or
the
measuring
unit.
*
The
parenthesized
are
the
values
of
voltage
generated
during
playing
(Test
disc
1kHz,
L+R,
0dB),
others
are
voltage
values
in
stop
mode.
¢
important
safety
notice:
Components
identified
by
/\
mark
have
special
characteristics
important
for
safety.
When
replacing
any
of
these
components,
use
only
manufacturer’s
specified
parts.
«
—_}
/-+1}--
:
Positive
voltage
lines
and
negative
voltage
lines.
-
:
Audio
signal
lines.
I
¢
$101
©
$102
¢
$601
¢
$602
¢
$603
¢
$604
¢
$605
¢
$606
¢
$607
¢
$608
¢
$609
HEADPHONES
3871
Power
Source
For
Continental
Europe
and
Australia.
Asi
TI25mA
(POWER)
(50/60Hz)
J80
1
cnt
Au
1Ari
st
I125ma
(POWER)
iB io
<
LINE
OUT
g
es
AC
240V
(50Hz1
AC
110/127/220/240V
(50/60Hz)

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