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4-1. BLOCK DIAGRAM
+B
(IR
D301,
SENSOR)
D302
Q301-Q303
Q304
RF AMP
BUFFER
(POWER)
S10
(IR
D303,
SENSOR)
D304
D306
TO
NI-MH
TMR-IF630R
1.2Vx2
(BATTERY CHARGER)
Signal path.
: RF
: ANALOG
16
SECTION 4
DIAGRAMS
L203 2.3 MHz B.P.F
f
f
3
5
MIXER
LIMITER
OUT
IN
MIXER
IN
LPF
MIXER
16
LIMITER
1
OSCILLATOR
2
IC201
MIXER / LIMITER / DEMODULATOR
L103 2.8MHz B.P.F
f
f
3
5
MIXER
LIMITER
OUT
IN
MIXER
IN
LPF
16
MIXER
LIMITER
1
OSCILLATOR
2
IC101
MIXER / LIMITER / DEMODULATOR
— 9 —
L204 2.3MHz DET. COIL
f
8
EXPANDER
QUAD COIL
IC301(1/2)
AMP.
AF
OUT
2
1
DEMODULATOR
9
6
AF AMP.
IN
2
VREF
SCAN
CONTROL 13
14
MUTE
L104 2.8MHz DET. COIL
f
8
IC301(2/2)
EXPANDER
QUAD COIL
AMP.
AF
OUT
6
7
9
6
DEMODULATOR
AF AMP.
IN
2
VREF
SCAN
CONTROL 13
14
MUTE
SW301(1/2)
RV301(1/2)
SOUND MODE
VOL
VOICE
IC202
IC203
VOICE ENHANCER
NORMAL
G.CELL
3
1
OUT
-
7
+
Q201
IC102
IC103
VOICE ENHANCER
SW301(2/2) RV301(2/2)
G.CELL
3
1
OUT
-
7
+
Q101
— 10 —
MDR-IF630R
IC204
POWER AMP
3
5
+
SP201
SPEAKER
–
(L-CH)
8
-1
IC104
POWER AMP
3
5
+
SP101
SPEAKER
(R-CH)
–
-1
8
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