Block Diagram - Sony TMR-RF845R Service Manual

Q Q
3 7 6 3 1 5 1 5 0

4-1. BLOCK DIAGRAM

R-CH
J401
B
AUDIO IN
J402
L
A
NOISE
FILTER
R R-CH
S401
NOISE FILTER
OFF
|
ON
• Signal path.
T E
L 1 3 9 4 2 2 9 6 5 1 3
16 : AUDIO
w w w
.
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SECTION 4
DIAGRAMS
IC403
STEREO MPX
IC401
INPUT CH1
LPF 1 BUFFER
AMP AMP
TIME
DEVISION
MPX
CH2
R-CH 14
AMP
BUFFER
OSC
DIVIDER
AMP
6 7
X401
38kHz
BUFFER RECT
Q401 D404,405
x a o u 1 6 3
y
i
— 5 —
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8
RV403
9 MOD IN ANT
T-OUT
VCO UNIT
8
5V
B+
CE DI CL
11 12 13
IC405(1/2)
CE DI CL
VS 10
INPUT D408
15
Q Q
IC404
DET
3 7 6 3 1
VCO CONTROLLER
5V 16
9 7 6
1
S402
2
CHANNEL
3
.
2 4
9 9 8
ANT401
IC405(2/2)
POWER OFF
DET
D402
CHG
IC402
+5V SWITCH
REG Q404
D401
POWER
+4V
Q402
2V
5 1 5 0 8 9 2 4
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in Ω and
• : internal component.
¢
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 9 V and fed with regulated dc power supply
from battery terminal.
• Voltages are dc with respect to ground under no-signal conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
• Waveforms are taken with a oscilloscope.
m Voltage variations may be noted due to normal production toler-
ances.
• Circled numbers refer to waveforms.
c o
• Signal path.
L: AUDIO
— 6 —
TMR-RF845R
2
9 9
CHARGE
J404
DC IN 9V
9 8 2 9 9
1 / W or less unless otherwise specified.
4