Technics SL-PJ28 - Page 18

SL-PJ28. SL-PJ28
1 2 3 _4 5 6_ 7 8 9
FY servo circuit
4gov
Ploy
OPTICAL PICKUP Q70l
2SBT09STW snipe o3v
LASER POWER DRIVE me J
2ms.0.2v/Div.
cba
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fe
1s
eaae
Mite
SH
nrg
Ploy
25
. Ww a
Best
eye
adj
a
qs
0.5ps.0.2v/D1V.
RT4aL R742
« Lng
ov
4.9
(OV) 4.8V
rT
4.8V
rere gpovew TT
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2
>
(5)-—-(6)
48v Jov [sav |4.ev
(ov) (ov)
=
tc701
OSV
3
AN8800SCE
2
|
ca
ce
SERVO
AMP
O.Spso.iworv.
=
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TRACKING
coiL
Pioy
ae |
oO2Vv
Sms.0 Iv/01V.
1
1
1
; Focus \
} COIL
u
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rest f ARF (1)
CONNECTOR !
|
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6
TP703
SPINDLE
MOTOR
TRAVERSE oes
MOTOR no
S21
1c703
AN8377N
TRAVERSE
- MOTOR DRIVE/
COIL DRIVE
cP702
())
vm
s701
(REST)
O.5ps.0.2v/0IV
cv
C725
M0.0i
R704
10K R7i4 47K
F =4.2336MHZ
1C706
MN6626
DIGITAL
'e702 SIGNAL .
TCAO372DM2RI PROCESSOR S
SPINDLE =
MOTOR DRIVE
49V(0.1V)
® 2.3¥
Ic705,
“PP MN6475
DIGITAL FILTER
F 216.9344MHr & 0/A CONVERTER \
T= 27 ms.
Ploy
0.5 ps.0.2wolv.
Play
Uv
0.5ys.0 2v/0lV
/
vw
oP
(0.6 V) (0. 1¥) | (0.4V)] (1.6) 1(0.3v)
ov Ov ov
R746 C754
ik Sovi
R719 12K
R720 27K
R718 22K
F =33.8686MHz
AW
cra F=33.8688MHz
Moo!
R730) «R745 «(C753
_ IK (K S$0VI
+
C736 6.3V100
— 29 — eee |e
C763
MO.01
C704
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DIGITAL SERVO PROCESSOR - wn
bedwe:
LYOODOYOUDO
OROKOROROKO
cs702
REST SW
SMCK
RST
STAT
D.MUTE
sua
Sock
BLKCK
/TLOCK
/FLOCK
SENSE
MLO
M OOATA
MCLK
P. GND
+801)
™
Lo sw
0.GND
+812)
Reh OUT
A GNO
r@-
Lech OUT
7
10