Technics SL-PS670A

SL-PS670A
lm Schematic Diagram e Optical Pickup/Servo circuit (Parts list on Pages 34~37)
1 2 3 4
FY servo circuit
° Ce R777 es
me [+ J 1K 4] 25 0 PLAY
osm ss leer Son wn] B a \
A Rin P20 OM GZ ITRS| wo a2 N K) IV
3 ey ex poi eee se (UB
0.5yS. 0.2V/DIV Ro oO oO nN '
pa) a ass SS | ~ us. oswoiv
my «1 C70! TJ701 re a
(vrer) AN8805SBEI SIRF) Bree
SERVO AMP 100K
A
eC B
e c
4
(3.9v)|(3.2v) |(3.6v) (3.6V) (ov)
® (O— 37V 3V 33V lov 3.3V ov 49V
uw w
& «
g <
z
6
o
4 b
>
B 3
ny
we
25V |2.5V SV SV SV $2 26V SV |25V 49V §25V v 5V 5V
AOPTICAL PICKUP (2.3¥)
q y y y {
C747 NO.O| R765
a a 220K
C748 NO.O1 iO Ths Si = bs VW —>
m | fa om] oO °
x | /o x|™ zg
om or Mi
oO o o oO
Ry lox ls KR nN nN o
eo<coosY¥ x oo C3 °
Rmooknm fn
amern 5 c709 |c742
K0.047 |KO.02|7
t i}-—+41F 4
\ | R703
82K
+
iz G E 10) A B c
Q75! 1
2SA933SQRSTA
POWER SUPPLY
ov 5v \
(49v) @, i
SF. YY PLAY \
t- ics > fo} 5V \
cof Olin (4.1V) 3V -
oN |] ON TH iy a p-p PLAY
o | 0 28 2mS, O.1V/DIV pag | 220m
o}]o co = pop
tov)
754
2mS.
0.2V/DIV.
RADIAL Cc ADB CH 107v) OK
COIL DF wx
Rm
Q752 Lay)
D 2SCI740SQSTA
POWER SUPPLY CONTROL
1C703
AN8389SE1
FOCUS COIL/RADIAL COIL
Dd SLEDGE MOTOR/
SPINDLE MOTOR DRIVE
10V220
C734
ve
SLEDGE
MOTOR
L
et
C737
Z0.022
m
1
©
Z0.022
‘+
= wo
SPINDLE (™) 0
MOTOR ,\o fe
| ISS254TA
|
Bt
(2) Pte c738 Ko.018
o| o iS © ra
$701
s|
oi
Sl
ss
(REST)
a
0
BS
e
s
C739
MI5OOP
er m 3° Ro a ™ ©
S = nu ©740 M2700P
ee
()
ee
=
fo
ie
KR
f
—I
F
E
F =16.9344MHz
c722
(2 3V)4.9V
1yS.0.5V/DIV
() TRCRS
MN6627I3RGI
SERVO PROCESSOR/DIGITAL
SIGNAL PROCESSOR/DIGITAL _
FILTER & D/A CONVERTER
PLAY
¢ PLAY
OV
175 PLAY -
BACA BCDEEG ABC OE F GH I
/
/
PLAY PLAY
ro 13v
Ip-p Why WA >
2mS.02V/DIV 2mS.0.1V/DIV
SL-PS670A SL-PS670A
CN702
(23) L ch OUT
1
[8 ano
1
Rch
TP20 +2) R ch our
9
+B(2)
TPIS @
0
TPIS |
4-1 <i) cer
TPIT
p——_1—«f) ™
TPIG
° r7Vv-
+B)
TPIS ©
eig 1
9
1
{9} mex
TPIS oO
9 )
(3) MDATA
; TPI2 ii
B 9
V {| mo
aT Cc TPII
vi0§ °
——$——on |
mp ata (8)=— D F (| SENSE
5 mtd @Q) E "3° |
¥ OV 1°] |
SV SENSE (0) a F . 1) / FLock
G TPS aii
H 9
H (9) /TLOCK
TPS | |
av 4 1 q (8) LRCK
K TPT t
9
. i
| DMUrE Oo Tmav SOCK
J
stat M TPS |
5 N 9
K suBQ
TPS ©
9
L + SRDATA
TP4 1
9
M STAT
8 TP3 S
>T>]2]2T2]2 9°
alololola
SS bala 4 fo Nios a taal
FS 9
eT) VCOF
lt
REST SW
Le Gain
CIRCUIT
(CN401)
(Page 19)
}
10
@ This schematic diagram may be modified at any time with the development of new technology.
Notes:
e S601
e S602
e S603
e S604
e@ S605
@ S606
e@ S607
e@ S608
e S609
e S610
© S611
@ S612
@ S613
e S614
e S615
@ S616
e S617
@ S618
e@ S619
e S620
@ S621
e S622
e S623
@ S624
e@ S625
e@ S626
@ S627
@ S628
e S629
@ S630
e S651
@ S701
@ S781
e@ S782
11 12 13
: Numeric (8) switch
: Numeric (3) switch
: Recall switch (RECALL)
: F. Skip switch ( bb] )
: Stop switch ( Hf )
: Numeric (9) switch
: Numeric (4) switch
: Random play switch (RANDOM)
: R. Skip switch ( k@<d )
: Pause switch (J)
: Numeric (0) switch
: Numeric (5) switch
: Repeat switch (REPEAT)
: R. Search switch (<@<@ )
: F. Search switch ( p> )
: Numeric (6) switch
: Numeric (1) switch
: Program switch (PROGRAM)
: Time fade switch (TIME FADE)
: Auto cue switch (AUTO CUE)
: Numeric (7) switch
: Numeric (2) switch
: Clear switch (CLEAR)
: Tape-side select switch (SIDE A/B)
: Time mode select switch (TIME MODE)
: Disc tray open/close switch (4 OPEN/CLOSE)
: Numeric (>10) switch
: Play switch ( B> )
: Edit tape length switch (TAPE LENGTH)
: Peak level search switch (PEAK SEARCH)
: Power “STANDBY (I) /ON” switch (POWER)
: Reset switch
: Disc tray open detection switch
: Disc tray close detection switch
@ Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-
impedance) with the chassis taken as standard. Therefore, there may exist some errors in the voltage values,
depending on the internal impedance of the DC circuit tester.
No mark: CD STOP
) : CD PLAY [1kHz, L + R, 0 dB]
@ Important safety notice:
Components identified by A mark have special characteristics important for safety.
Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-
noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturer's specified
parts shown in the parts list.
@ 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 legs of IC or LSI with the fingers directly.
® Voltage and signal line
=ummpe== : Positive voltage line
: Negative voltage line
: CD signal Line
@ The supply part number is described alone in the replacement parts list.
Production Part No. Supply Part No.
1C11 LM2940T5M LM2940T5
=1es
14