Technics SL-PJ27 - Page 24

Mi SCHEMATIC DIAGRAM
(Parts list on pages 40, 41, 47, 48.)
(This schematic diagram may be modified at any time with
development of new technology.)
A
Notes:
°St
:
Power
switch
(POWER
ML
OFF
=
ON)
in
“on”
ge
cpa
position.
°S2 : Voltage selector switch. [For (GC) area.] pan TROCUS \-{ TRACKING)
*$101, 102 : Disc holder open/close detection switches. aa 081 Ton Le.
¢ $601 : Disc holder open/close (4 OPEN/CLOSE) switch. 5K —_
i
tL
eter
¢
$602
:
Stop
(MI
STOP)
switch.
(eo)
¢
$603
:
Repeat
(REPEAT)
switch.
am
°
$604
:
Pause
(§l
PAUSE)
switch.
A
SERVO
COURCUN
TS
--
sade
cia,
47e
¢
$605
:
Play
(®
PLAY)
switch.
'
2
Are
er
¢
$606, 607
:
Search
(<<
SEARCH
BP)
switches.
B
T
143
|
47°
2SAI547QSTV2
[S606
:
<<q
(B),
S607:
BP
(F)]
i
:
ae
ae ae
ae
AUTO
POWER
CONTROL
*
$608, 609
:
Skip
(qq
SKIP
Di)
switches.
€
‘=
[S608: kq<q (B), S609: PP (F)}
1C103
AN8377N
FOCUS/TRACKING
/TRAVERSE COIL DRIVE
¢ $610 : Time mode select (TIME MODE) switch.
¢ S611 : Program (PROGRAM) switch. CBTECDRIVES aobdce f
©
$612
:
Clear
(CLEAR)
switch.
cN103
° $613 : Auto cue (AUTO CUE) switch. |_| 'S :
° S614 5 Tape side select (TAPE SIDE A/B) switch. Owe tev) Koay) (0. 2v Ka
° $615 : Edit tape length (EDIT TAPE LENGTH) switch. © @ @ 8
s |e & Gene (5)
z 7
3
i" So
TRV Lae J.
Zz we
|
e The voltage value and waveforms are the reference voltage of : S
this unit measured by DC electronic voltmeter (high impedance) Cc c Ke)
and oscilloscope on the basis of chassis. : a
Accordingly,
there
may
arise
some
error
in
voltage
values
and
Wy
2Sn12400RTVE
t
Ki
|
To
BIMAIN
waveforms depending upon the internal impedance of the tester mr lores REGULATOR : re CIRCULT(CNA06)
or the measuring unit. aed lo
* The parenthesized are the values of voltage generated during ie
playing (Test disc 1kHz, L+R, 0dB), others are voltage values hot :
in stop mode. Ke
¢|Important safety notice: 2
Components identified by A mark have special characteristics ,2) J
important for safety. When replacing any of these components, 3}
use only manufacturer’s specified parts. D seewibce
e-< Srle< >: Positive voltage lines and negative RUS 4.7K MOTOR
voltage lines. <l8| | Re O—( mp
° : audio signal lines. =o Ba ake hee
a)
5
@ieva.7
22k
A
Caution! : cise Cae eS hea re
IC and LSI are sensitive to static electricity. re
Secondary trouble can be prevented by taking care during repair. $ ee
¢ Cover the parts boxes made of plastics with aluminum foil. NN ae ae
© Ground the soldering iron.
¢ Put a conductive mat on the work table. Bdalsote ati
© Do not touch the pins of IC or LSI with fingers directly. E q |
b Pio
d _\n 0.4V ap
a eee cere? :
f LL oneeng9 out 2a oi biy
7 10.15Vp-p
Waene eave Play 2ms. 0.1V/DIV a
‘ ny O
Dwg ee [Pw maa
h [| avd (2)
bo ; al “
gain adj. Mie ®
Tracking )
Ploy _. Plo ‘ gain adj. ®
eee | pp
--0
V/D1V.
yeas
O.5ps
OIV/OIV
2us
2V/01V
— 25 — ee