Sansui SR-737/7090 - Page 2

5635/5090
1.
BLOCK
DIAGRAM
|
1) SR-737/SR-7090
|
| FG SERVO CIRCUIT
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SPEED PROPO- FREQUENCY CONTROL
| VOLTAGE
:
TIONAL
PULSE
CONVERTER
-
CIRCUIT
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MOTOR
CONTROL
CIRCUIT
Fig.
1-2
FR
Bree
One
nt
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TV
Ls-1~Lg-3
POSITION
SENSER
COIL
TTD
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LM-1~LM-3
DRIVING
COIL
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3
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2
-2
53
tor
BIAS
COIL
%
1
FG
SERVO
CIRCUIT
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MONOSTABLE
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7
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360H2
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VOLTAGE!
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PRL
tie
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HK
HK
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(3343)
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FACTOR
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PLL
PHASE
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COMPARATOR.
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on
Bae
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OUTPUT
DIVIDER
AND
PHASE
COMPARATOR
(MSM5810)
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bard
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9
TRoe
TRoe
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oF
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(45)
|
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vee
CR
PLL
SERVO
CIRCUIT
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A.V.R :
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CR GENERATOR (MSM4069)
Ct] 7 Vvoo
CR GENERATOR
FREQUENCY A.C. J
45:360H2 OUTPUT A.D.J
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PLL
SPEED
SELECTOR
SW
~ SR-737, SR-7090 Main Circuit
The
electronic
circuitry
in
this
set
is
two
servo
circuits
and
a
motor
This
set
employs
both
the
F-G
servo
system
and
PLL
servo
system
control
circuit.
|
by
which
rotation
fluctuation
is
always
locked
in
the
reference
The servo circuit employs the PLL servo system and the speed signal.
control system (frequency-generator servo) together.