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Technics SL-P250 - Page 26

Technics SL-P250
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SB
2)
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20
21
22
23
24
25
26
Mi
SCHEMATIC
DIAGRAM
(This
schematic
diagram
may
be
modified
at
any
time
with
[&y
Power
supecy
circuit
Qi3
Ici
development
of
new
technology.)
/A
CONVERTER/AUDIO
CIRCUIT
2SD1862
LM2940)
o>
ei
REGULATOR
REGULATOR
ae
Is
N
otes:
aov
ACV
2
°S1
:
Power
switch
in
“on”
position.
8
®
A
°$2
:
Voltage
selector
switch.
ee
BA4S5S58FTI
i
ae
E
(For
[EK], [XA], [XB],
[PA],
[PE]
and
[PC]
only.)
91k
dims
2/01
STARIGIZER
im
*S101
—_:
Disc
holder
open/close
detection
switch.
azz
aix|
|
|
Bate
aa
a
Gonz
°$102
—:
Disc
holder
open/close
detection
switch.
),(MC
)
.
sx
GC
Huet
yeas
ne
°S601
—:
Open/close
switch.
+8
4)
am
na)
¢S602
=:
Stop
switch.
Pav
ay
i
R307
¢$603_:
Pause
switch.
7
i{
{fT
_toviasv
8
5ms.2V/DIV
5ms.2V/DIV
seo
QS
2SB1240
¢
$604
:
Play
switch
R417
6
0s
oe
AN
ee
1C401
8
REGULATOR
°S605
=:
Repeat
switch.
Pav
890
NISS4PEP
system
=
bli
15,17,
21,22
9
Tora
8
aay
CONTROL
*9G9
3a=-
NT
re
sebO0N
¢
$606
=:
Program
switch.
a
aaa
ra
ane
aay
(rAT77
ABV
50v
mre
peau
"
=
¢S607
=:
Backward
search
switch.
BV
(0.1)
|
s
,
c
G3)
ent
4
woaTA
69
1CB7I
881,682
¢S608
=:
Forward
search
switch.
b
Hf}
eg
TRV-F
10ms.2v/DIV.
O2ms.2v/0IV
i36ps
7
MLK
GSE
2SD1450
°
S609
Baskward
ski
itch
att]
10V143V
6S
tay-R
Play
M
6
HEADPHONES
AMP
MUTING
|,
gy,
:
Backward
skip
switch.
:
fi
ar
ogy
¢
$610
:
Forward
skip
switch.
é
ke
ale
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I+
Sole
R879
|
aS
|
ov230!
tolviagv
2SB
1238
L
oat
2.2K,
°
$611
:
Preset
edit
play
switch.
=
E
REGULATOR
8
Bee
-
j
S
(HS
re
<
ws
es
*$612
:
Time-mode
select
switch.
ay
=
i
Be
eee
°
$613~623:
Numeric
switch.
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ale
30
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(yes
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3,
S615:
2,
S616:
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0.1
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a5
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»
vu,
2
J,
6
~d,
vies
is
:
bag
8g
-
oe
Von
$617:
+10,
S618:
6,
$619:
5,
S620:
4,
1
a
BS
3
$621:
9,
S622:
8,
S623:
7
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Bi
086!
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ff
CN6OS
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ae
Tit
77
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Gamo
moms
rL
ex
¢
The
voltage
value
and
waveforms
are
the
reference
voltage
of
0
=Fa
Lt
ges
SY
oe
Jollet
ES
this
unit
measured
by
DC
electronic
voltmeter
(high
impedance)
omeavo
8/8
r
“Taz
ate
lo
and
oscilloscope
on
the
basis
of
chassis.
=e
86
1,862
at
Ol
Accordingly,
there
may
arise
some
error
in
voltage
values
and
b
2S8C3311
waveforms
depending
upon
the
internal
impedance
of
the
tester
C
OHO
9
a
ae
aed
HL
a
or
the
measuring
unit.
SOV
SOV
jay
86
[>
a
rer
er
*The
parenthesized
are
the
values
of
voltage
generated
during
sms.2v/OIV
Pray
ae
ea
ies
Ea
playing
(Test
disc
1kHz,
L+R,
0dB),
others
are
voltage
values
1Oms
eve
t
4.7K
Is§eo4
soZe4
are
.
in
stop
mode.
LA,
get,
Pe
188254
*
Important
safety
notice:
g
2oN
-
Components
identified
by
A\
mark
have
special
characteristics
RE5o
eM
24V
(-.8V)
:
ang
Lee
470
important
for
safety.
When
replacing
any
of
these
ov
2
ov
za.
‘o.1vi
hie
ao
avy
Play
1kH7
048
components,
use
only
manufacturer’s
specified
parts.
Tov
Sma
aww
DAI5/SRDATA
G6)
Sf
49v
ao"
(49VI
sey
bs
10802
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;
,
;
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g
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wer
B/
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Cart)
NJM4560M
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—(}
/-+2}--
:
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voltage
lines
and
negative
voltage
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DAI3/SRCK
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wach
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as
805
47P
BUFFER
AMP
fines:
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17
Sus
2w0Wv.
DAI
/BYTCK
GO)
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PAN
tetrad
Oya
ee
:
DTAIIGEST
ok
R809
47K
:
Audio
signal
lines.
Sip
Ze
b
'Oms.2V/DIV
DIGITAL
SIGNAL
“onion
nee
peal
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R923
MUTING
CONT.
3
es
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ps
and
LSI
are
eee
Static
eee
ae
econdary
trouble
can
be
prevented
by
taking
care
during
repair.
J80
|
J
saffoebees
be
EO
Lcho
¢
Cover
the
parts
boxes
made
of
plastics
with
aluminum
foil.
Le
ie
¢
Ground
the
soldering
iron.
Bay
/
22
2e2gaesy
t’,,
ae
(kHz.
048
:
¢
Put
a
conductive
mat
on
the
work
table.
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3st
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*
Do
not
touch
the
pins
of
IC
or
LSI
with
fingers
directly.
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