Sony MDR-IF630R Service Manual page 12

• IC BLOCK DIAGRAMS
IC101, IC201 SC111711DR2
IC104, IC204 MC34119DTBR2
MIXER
INPUT GND MUTE
16 15 14
SQUELCH TRIGGER WITH
HYSTERESIS
MIXER
OSCILLATOR
1 2 3
MIXER
OUTPUT
CRYSTAL
OSC
7 6
8
BIAS
CIRCUIT
1 2
SCAN SQUELCH FILTER
CONTROL IN OUTPUT
13 12 11
FILTER
LIMITER
AMP
4 5 6
VCC LIMITER
INPUT
DECOUPLING
3
— 15 —
FILTER RECOVERD
INPUT AUDIO
10 9
–
AF
AMP AMP
+
DEMODULATOR
7 8
QUAD
COIL
5
+
_
4