Technics SL-PJ27 - Page 23

SL-PJ27
M@ INTERNAL CONNECTION OF FL
¢ Grid connection diagram
126
e Anode connection table
e Pin connection
PEN NO. [Be}n6 oda 22a 02025127 a6 28/24
commonon [3 Efe
3.)1G~12G----Grid.
a
a
BE
— 3) 00] 0)
(14)
= Of Ol
(8)
(5)
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.)
Notes:
°S1 : Power switch (POWER Hl OFF m ON) in “on”
position.
© $2 : Voltage selector switch. [For (GC) area.]
¢ $101, 102 : Disc holder open/close detection switches.
e $601 : Disc holder open/close (4 OPEN/CLOSE) switch.
° S602 : Stop (HB STOP) switch.
¢ S603 : Repeat (REPEAT) switch.
° $604 : Pause (§— PAUSE) switch.
¢ $605 : Play (® PLAY) switch.
¢ S606, 607 : Search (<< SEARCH PP) switches.
[S606 : <4<q (B), S607: BP (F)]
¢ S608, 609 : Skip (Kq< SKIP BP) switches.
[S608: Kq<q (B), S609: DP (F)]
° $610 : Time mode select (TIME MODE) switch.
° S611 : Program (PROGRAM) switch.
° $612 : Clear (CLEAR) switch.
° $613 : Auto cue (AUTO CUE) switch.
$614 : Tape side select (TAPE SIDE A/B) switch.
° $615 : Edit tape length (EDIT TAPE LENGTH) switch.
¢ 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, OdB), others are voltage values
in stop mode.
¢ Important safety notice:
Components identified by A mark have special characteristics
important for safety. When replacing any of these components,
use only Wyle acs specified parts.
e-< >-/: >: Positive voltage lines and negative
voltage ines:
° : audio signal lines.
Caution!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during repair.
¢ Cover the parts boxes made of plastics with aluminum foil.
¢ Ground the soldering iron.
¢ Put a conductive mat on the work table.
¢ Do not touch the pins of IC or LSI with fingers directly.
PY servo CIRCUIT
RI28 10K
SL-PJ27
SL-PJ27
3
OPTICAL PICKUP
( FOCUS} (TRACKING)
SPEED
RAL oa LHON
NSOR
bie CNIO
(eo)
fa
G
R103 1.2K
1C103
AN8377N
FOCUS/TRACK ING
/TRAVERSE COIL ORIVE
(BTL ORIVE)
Ploy O16
0.2Vp-p 25B1240QRTVE
REGULATOR
C145,
6.3V100
2ms.0.1V/0IV
a
°
°°
e
aa
fe
<
rs
a Gey
cv, a
~ ee ao
Uh
1
AN8374S
SERVO PROCESSOR
Ploy
1.0V
pp
Lev YH 2ms.0.5V/D1V.
x At efeaeking offset adj.
at
R10 120
oe 1647
G7) 800 Te out (6)
G6) RFDET TE BPF
(Ov)49V
seg
v
10V)49 64)
| ov)
G3)
Play
2ms O.1V/0IV
a2v
oP
Play
2mso02v/Dlv —
0.4V
p-P
\
ae Ploy
~70V - ov
2us 2V/0IV O.2us 2V/01V
Play
rey
<
OSus 2v/01V.
O.5pys O1V/D1V