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Toshiba ST-55 Service Data page 10

Digital synthesizer tuner

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TA7616P
TC9137P
22
AMIN
PSC
FMIN
STANDARD
-
-_
Do-1
DIVIDER
25KHz
LINEAR
BAR
|e
H4
INDICATE
H5
DECODER
ee
DRIVER
TS
L2
RAM
(PRESET
MEMORY)
DIGITAL
INDICATOR
DECODER
CONTROL
LED
DRIVER
MEMORY
LEAD
LIGHT
CONTROL
VDD
GND
INT
INH
PEE
LA1231
QUADRATURE
LIMITER
AF C/TUNING
(7)
R QUADRATURE
METER ORIVE
DETECTOR
DETECTOR
Weevil
ST-55
ST-55
7. |C BLOCK DIAGRAM
TA7654P_
HA12412
i
HAI24!2
R
vin O-PD
se OHS
ot
roy
a
(13)
RI
AS
A
Quadroture
|
AFC
Detector
Amp.
al bl ci d! el
fi! gi
a2 b2 c2 d2 e2 f2 g2
a3 b3 c3 d3 e3 f3 g3
1/0
TD6104P
Tt
10
20
TA7324P
HA12016
V9
ae
TC5029BP
vec
a
RECTIFIER
POWER
as
4
HOLD
INPUT(4 )
CIRCUIT
\/4 COMPRESSOR
HOLD(R)

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