Philips LX3700D Service Manual page 64

1.5 Block Diagram RX
S1
RECEIVER / FRONT END
7601 7602
1602 BFC520 BFR92A 5606
LNA
SAW
(LOW
MIXER
FILTER
NOISE
10.7MHz
AMPL.)
- PLL -
7603 LOCAL
BF392A OSCILLATOR
7604
6601
BB151
1609
(VARICAP)
4MHz
J1
1
Mains In 2
NC
3
SMPS
AC/DC
Switch Mode
Power Supply
11-4
S2
RECEIVER / BACKEND
7710
7707
LA1836M
1706 BF520 1707
1
IF IF IF
11
7605 7050 1710
TSA5060ATS PIC12C508A DET
ADJ.
1
10,7MHz
14
+5V
F741
µC
16 5 DA 7 2 MUTE-VIA µC
SYNTHE-
3 POWER SAVE
F742
SIZER
2 6 CL 6 programmed
4
for 433 MHz
CHANNEL
or 864 MHz
SELECTION 1765
5
carrier
SWITCH
4 POSITIONS
J3
1
+10V
To Wireless
2
Amplifier
Conn. 1107
3
STBY_OUT
J2
1
-29,5V
2
To Wireless
Amplifier
3
Conn. 1104
4
+29,5V
FM STEREO
AMPLIFIER
DETECTOR DECODER
L R R
30 7 8 12 20 21 19
1730
7706
3741 F724
FILTER
SLIDING
MUTE
20kHz
STEREO
LEVEL
F725
CONTROL
ADJ.
7705
3743
SLIDING
STEREO 1740
ADJ.
FILTER
20kHz
AND
6710
GATE
W
AUDIO OUTPUT AMPLIFIER
+10V
3144
sensitivity 1.4Vrms
1106
F135
1 R
F137
2
F138
3 L
F139
4
+10V
3117 3126
F140
5
(active high)
F142
6 MUTE
F144
7 POWERSAFE
(active high)
sensitivity 2.5Vrms
7105,7108
F120
1109 1
WIRED
WIRED
F121
R
3
AUDIO MUTE
F125 DRiVER
IN
2 L
(3,5MM
5 F122
stereo MUTE WIRED
jack)
F110
+29,5V "+Power"
F128
+ Analog
1104
F129
1
+15V
2
From
SMPS
3
Conn. J2 +10V
F134
4
-15V
F141
F136
- Analog
F119
1
-29,5V "-Power"
From SMPS Conn. J3
11-4
- EXPANDER -
7780
7770
SA572D NJM4565M
2703, 3727
17 7
5 6
R DE-EMPH.
∆G
5
9
16
11 V
L
DE-EMPH.
L
18 2702, 3728
2
3
3
V
RECTI-
13
FIER
3766
MUTE
+5V
6751
+10V
7790
LA931
8
1
+8V
5
+ Analog + Power
7101
7100-D,7100-A
TDA8920
Input Driver
F111
Input
Driver
F114
7100-C,7100-B
Temperature
7104
protection
6100
F127
MUTE Mode
OSC
CONTROL mute
6101
C5V1
7107 MUTE_AMPn
POWER 6103
SAFE
CONTROL
6106
C2V7
7110
"ON"
LED
7106
DRIVER
STANDBY
F124
DRIVER
6109
GREEN
Standby out
F145
F143
2 3
1107
1790
F712 F728
1
7 R
2
F713
L 3
1
7784 7789
F729
7755
F702
4
+10V
5
F727
6
MUTE
F745
POWERSAVE 7
5104,2122
1100
F113
4
8 Ohm/50W
F112
3
F115
2
F117 8 Ohm/50W
1
5105,2125
- Power
- Analog
7109
"STANDBY"
LED
DRIVER
F123
6110
RED
update mdi 13-03-03