Diagrams; Block Diagrams - Sony TMR-RF975R Service Manual

Q Q

4-1. BLOCK DIAGRAMS

3 7 6 3 1 5 1 5 0
TX-BASE BOARD
CHG-NR BOARD
IC401
R-CH
J401
B
13 1
AUDIO IN
J402
L
A
NOISE
FILTER
R R-CH
S401
NOISE FILTER
OFF
|
ON
• R-ch is omitted due to same as L-ch.
• Signal path.
L : AUDIO
T E F
L : FM 1 3 9 4 2 2 9 6 5 1 3
w w w
.
SECTION 4

DIAGRAMS

RV401
(1/2)
MODULATION
2V
D408
IC601
IC403
(L-CH)
STEREO MPX
IC602
12 11
10
(R-CH) RV402
VS
CH1
LPF BUFFER
2 7 14 9
AMP
TIME
MODULATION
DEVISION
MPX
CH2
R-CH
1
AMP
BUFFER
L407
OSC
DIVIDER 8
AMP
MODULATION
6 7
B+
X401
5V
38kHz
Q402,405
BUFFER RECT INPUT
Q401 D404,405 DET
x a o
y
i
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8
RV403
MODULATION
Q403
MODU-
MOD IN ANT O
I
LATION
VCO401
(VCO UNIT)
5V V
1
CHANNEL
S402
SET
2 CHANNEL
Q408
3
Q Q
3 7 6 3
u 1 6 3
.
5 5
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2 4
9 9 8
ANT401
CHG-NR BOARD (2/2)
IC402
SWITCH
+5V SWITCH
REG Q404 Q601
D401
IC604(1/2)
power
POWER
DETECT
ON/OFF
Q406,407
IC603
SWITCH
COMPARATOR
Q602
D407
SWITCH
Q604
D402
chg
1 5 1 5 0 8 9 2 4
m
c o
TMR-RF975R
2
9 9
+
CHARGE
TERMINAL
–
(TO MDR-RF975R)
IC604(2/2)
OSC
DETECT REF V
Q605
IC605
+5V SWITCH
REG Q603
DC IN 9V
9 8 2 9 9