Technics QUARTZ SL-MA1 - Page 26

10 11 12 13 14
@ SCHEMATIC DIAGRAM
(This schematic diagram may be modified at any time with the development of new technology.)
Notes:
1. $601 : Power switch.
2. $602 : Start - Stop switch.
s
wont
3.
$603
:
Cueing
switch.
Caution
!
4.
$604,
S605
:
Forward
search
switch.
IC and LSI are sensitive to static electricity. 5. $606,S607 _; Backward search switch.
“stor
“PLAY
Secondary
trouble
can
be
prevented
by
taking
care
during
6.
S608
Pepeed
selestOl
site)
lgmsec 23msec. “ 7. $609 : Repeat switch.
°
°
pepe:
8.
The
voltage
value
and
waveform
are
the
standard
values
of
- * Cover the parts boxes made of plastics with aluminum foil. this measured by DC electronic voltmeter (high impedance)
ene
hy
*
Ground
the
soldering
iron.
and
seal
aes
the
bais
of
dv
seach
te
Ba
/]
_19msec.
23msec.
:
value
and
waveform
may
inclu
some
error
due
to
the
/
ly
fe
ei
ae
|e)
*
Put
a
conductive
mat
on
the
work
table.
internal
impedance
of
the
tester
or
the
measuring
unit.
4 * Do not touch the legs of IC or LS! with the fingers directly. * is the voltage when turntable is stop.
pera”
(
)
is
the
voltage
when
turntable
is
in
rotation.
Bmaee. | is the voltage when tonearm is in lead-in mode,
v
SW
.
*
<<
=>
is
the
voltage
when
tonearm
is
in
return
mode.
a
9.
Positive
voltage
lines.
Arm drive coil circuit :
10. Important safety notice:
Value of Coils
RI =About 163.0
R2=About 163.0
R3=About 113.0
Components identified by A\ mark have special characteristics
important for safety. When replacing any of these components,
use only manufacurer’s specified parts.
R4=About 327
*The part No. of transistor, I1C and diodes mentioned in the
schematic diagram stand for production part.No. Regarding the
part No. with © 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.
Z Vertical drive Coi
Horizontal drive
@ TERMINAL GUIDE OF IC’S, TRANSISTORS and DIODES
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2801383
2SD892
Turntable
drive
circuit
Turntable
control
circuit
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