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22
23
24
(CAPSTAN BOARD]
sod
on
Ic902
CAPSTAN MOTOR DRIVE
: MOTOR
COIL
MOTOR
COfL
MOTOR
COIL
1902
CXx20174
—W——
ROIS
10
R916
10
-———»
4 +
cout
108
16
C908
0.16
C907
0.1» C909
0.18
|_ReD_GNo
BLU
[ WHT_
vce
25
26
27
28
[PREEL MOTOR BOARD] ge |
8 |
So
CNIQS1
bs
'e
anon
die
SLF-325C
ASSIST - fe]
-
(CASSETE LAMP)
ASSIST + Fo
Bs
rete
i
es
B:
wn 82
REEL -
fo
=
ASSIST MOTOR |
REEL
+
+
+9.2V
cose
-
A
M1001
SERVO GNO bef
Sov Te isi
WON
6F ZLABH
103
REEL MOTOR
SOV
FWO TAB
Q00R Sw
CLOSE Sw f o
OPEN Sw f o
PATERN
f o
PATERNS
f o
GNO f r o
PATERNZ
f o
PATERNI fo}
ROTALY
ENCOBER
$1001
<J
=
3 8
11002
GP25228
N TAKE UP REEL
DETECT
R
icoor
N
GP2522B
N suppcy Reet |
N
DETECT
[MD
BOARD}
i
GND
f o
5. SENSOR lo]
HALF
ote:
All capacitors are in uF unless otherwise noted.
pF: wuF
50WV
or
less are
not
indicated
except
for electrolytics
and tantalums.
All
resistors
are
in Q
and
1/,W or less unless
otherwise
specified.
%
: indicates tolerance.
4:
internal component.
Et :
fa :
nonflammable
resistor.
fusible resistor.
Note:
The components
identi-
fied by mark
or dot-
ted
line
with
mark
are critical for safety.
Replace only with part
number specified.
[COMPARATOR BOARD] — TT be
|
C956
474 25V
1C952
TC9142P
ve
Ic9si(v/2)
IC9S1U/2) &
Rcassep
rcasser Ro I
ame
= B+
Line
eeemm
© B—
Line
[C1]:
adjustment for repair.
Voltage
is dc
with
respect
to ground
under no-signal
conditions.
Voltages are taken with a VOM
(input Impedance
10M @).
Voltage
variations
may
be noted
due to normal
produc-
tion tolerances.
@ IC Block Diagrams
IC902 CX20174
gs:
<=
2e2
3
2-2-2
g
es
+
=
5p
€8
IC802 BA6219B
IC803 LB1641
3
§F
Bs
Te
IC952 TC9142P
cLawe
()
FwO/REV/STOP
CONTROL LOGIC
Fwo.
tn &)
REV.
IN (~)
vec
1 (+)
vec
2 (@)
NOISE
FILTER
N CRYSTAL
EFERENCE
DIVIDER
=
S
a =
>
So
x mM
x
AFC 8 BIT
D/A
CONV
CIRCUIT
SPEED MONITOR
INV DETECTIVE
CIRCUIT
1/20 or 1/27
DIVIDER
CIRCUIT
APC 8 BIT
D/A CONV.
CIRCUIT
MOTOR DAIVE
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