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Scully 280B Series - Page 190

Scully 280B Series
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4-2
IpOWER
SUPPLl;---
- - - - - -
--,
I
>-
24V
REGULATOR
I
CURRENT
LIMITER
>-
OVER-VOLTAGE
-PROTECTOR
I
I,
+24V
rR~;;';';-C
- -
11
I
ASSV
I
I
SPEED
I S
ELECT
I
SWITCH
I
L
____
~
Theory
of
Operation
Model
285B
I
ASSY
=81-----1-')
1: 3
I_
~
_________
-
_
rR~Y~IZI
I
ASSY
I 1 _ _ _
'I
VOLUME
I I I I
I
RIOI
[291
-II
TBI
I
~CHI
1
1-----
1 1 I
~ONES
:
I I
SPEAKER
I CHI
~~4---~
I
PLAY
HEAD
I
L
__
~
-==~~-J\
OUT
:
PREAMP
L
____
·
....J
R23
U2
>4---1
LINE
DRI
VER
H
["~:"~
001
I
I
1
POWER
SUPPLY
I A
SSY
I
R2
·1 U2
T2
1J134
:-----1
1I
NE
DR
IVER
>----.-------..
CH
2g
r - - -, I,
LINE
OUT
I
RELAY
LOGICI
I
ASSY
I I
1 I I
1
VOLUME
2 I
U3
C30
I-II
TBI
PWR
~
CH2
1
RI02
I
AMPL.
r
~ONES
II
SPEAKER
I
I I I II
OUT
I
L
__
~_-~_-_
-.JI---
J
202392A
Figure
4-1.
285B
Reproduce
System
BZock
Diagram

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