Sony MDR-IF5000 Service Manual page 20

4-1. BLOCK DIAGRAM
B+
(+3.0V)
B+
(+1.7V)
INFRARED
SENSOR
D1-4
RF AMP BUFFER
Q1-3 Q4
BPF
B+
(+3.0V)
04
SECTION 4
DIAGRAMS
AUDIO (L) MIXER LIMITER
IC31
SQUELCH TRIGGER
WITH
L34,35
HYSTERESIS
TUNING
(L)
QUAD COIL
8
OSC
2
OSC
OSCILLATOR
1
MIXER LIMITER
MIXER
OUT 2.3MHz BPF IN
IN
BPF 16 MIXER 3 5
L33
LIMITER
AMP
MIXER MIXER LIMITER
2.8MHz BPF
IN OUT IN
MIXER
16 3 5
L53
LIMITER
AMP
OSC
1 OSCILLATOR
OSC
2
L54,55
TUNING
(R)
QUAD COIL
8
SQUELCH TRIGGER
WITH
HYSTERESIS
AUDIO (R) MIXER LIMITER
IC51
– 7 –
MUTE
14
GND
15
AF
AF
AMP
OUT
DEMODULATOR 9 -1
L
B+
VCC 4
(+3.0V)
RV10
BALANCE
(+3.0V)
RV11
VOL
AF
OUT
DEMODULATOR -2
9
R
AF
AMP
MUTE
14
GND
15
VCC 4
B+
(+1.8V)
B+
(+1.7V)
D10
POWER
DRIVER AMP (L-CH)
IC32
VIN
–
4 VO1
5
3 +
FC1
–
8
FC2
+
2 VO2
VCC
B+ BIAS
6
CIRCUIT
DRIVER AMP (R-CH)
IC52
VIN
–
4 VO1
5
3 +
FC1
–
8
FC2
2 + VO2
VCC
BIAS
6
CIRCUIT
DRY BATTERY
• Signal path
SIZE "AA"
(IEC DESIGNATION R6)
S10
2PCS, 3V
(POWER)
OR
NICKEL CADMIUM
BATTERY
(NC-AA)
700mAh 2.4V
– 8 –
MDR-IF5000
SP31
L-CH
SP51
R-CH
: RF
: ANALOG