Technics SL-PC25

lM BLOCK DIAGRAM
ANB374SE2
LHSII6N3
SERVO PROCESSOR | 16302
4
VREF | 16K RAM
Tracking ANB373SE2 D
: Column ato
sia | @ @ veer | conte
OPTICAL
PICKUP
(VRIO6)
SERVO
AMP
|
aa
Bare err e 1 de oe | tae. ees (eae. See :
FT.
ain
426
voo
Vee
vss
7
|
Chip
select,
write
;
enable
output
enable
@ © down |
eet Pot amp.| Tain 2s 29 L wy e- MN6474
up Speed 1
position
pubter
F
gain
J24
23
control
{1c
801
|
w
| a up Yio oe ay w Seees DIGITAL FILTER & D/A CON
T Loop filter ? [1301 |
101 go tes :
oe
DIGITAL
SIGNAL
PROCESSOR
a
©
aa
& 53 52 44 154 64 \ 10,15,17,22 | 23,28,38 .
|
:
eae
ah
ae
a
pe
Se
sa
net
is
ra
| Distinction of 3 AVOD Ovo0 AVS
PO | direction EFM frequency Syndrome
I Tracking le] detection NJ computation ccu
| | gain adj. flag count
I |
|
;
EFM
\ F Loop filter VREF protection demodulation Working
| oS a rpolation RAM ALU
| Addition Sub code
| (x2) Tracking demodulation
j \ Best sjecaj: balance | offset adj. ERC check
L (VRIO1)
SRDATA
Focus offset
adj.
(VRIOS)
Tracking
balance
15 VREF| Focusgain
“yr adj.
I (VRIO4)
RAM address
generation
CLV control
7
8 {CLK} 4wock rad
Freguency
detector
EFM !
!
Se oie oe L ee zee
% — “Tee 7
8 28 Fe
Lepr oe
VREF
(
SRF
=
|
Ss AN8377N (Spo)
7 i
To —
BTL DRIVE
Tracking ir >
coil
To +
|
BA4558FT!
po
! Fo -|
\ Focus i 0353
coil FD +
fet Pe at es =] al Motor control
TRAVERSE UNIT
eee Ore eae 5 a
re Q351
Traverse g I ees 352
coil +1 14 coil drive
| T aap oe |
te ee a J LESS 6 Sd
7 3 i
VREF as ( |
SPINOLE
¢s)
MOTOR
BA6247N ah REE AIG NS A MOT NS BS 0 a a SRR AI ROS a a SB ee ay
b >ot Mm uw = x ow x x ° = a¥Qy w | HC-MDIOE
oO a 9 a =
a wFeebeete & 2 a g s 8 ros? 5
MOTOR DRIVE a BERE SS & 4 5 a &$ 6275 = |
ra
66
6
6
za
r)
a
=
REMOTE
CONTROL
RECEIVER
15 “
MNI87I24PKD4
remocon.
6
OF
fc
404]
I
|
|
|
|
herr
SYSTEM
CONTROL
Control | Q47!
|
|
|
|
circuit
y
TURN
SYNCHRO
yo
>>,
SYNCHRO
|
©
ORAW
a
ll
EDIT
18
|
Ean
So
See
so-~
$9
P40~P47
RECVEN
0
|
4
L
F:
VPP vop vss J
$40IV419
control
LOADING
MOTOR
0451, 452
FL DISPLAY (PHOTO SENSOR)
—
2
— —
26
—