Philips FR975 Service Manual page 37

BLOCKDIAGRAM
+FM
6 3
+B AGC
A
1102
1 Ant1
F
a
4 GND
f = f + f
0 in if
MT
MT
AM-RF
5102
MW
2106
5103
LW
B
7A-3
VCC1
FM FRONTEND
STABILIZER
10,7MHz
IF Out 7 37 FM-IF1I In
F 10,7 MHz 5 FM Osc.
if
F o
Osc Out 8
6
VT
5
8 I-Tune
2 AM-RF
C
AM-OSC
5123
MW
5122
LW
MW/LW-SELECTION
IF-AM IF-AM
10,7MHz
450kHz
VDD
5111 5112
7 23 35 34 33 38 40 41
VCC1 VDD FM-IF2 V Stab B FM-IF2I V Stab A AM-MIX Out AM-IF1 In
FM FM
IF1 IF2
CHARGE
PUMP
AM FM
FRONTEND DET
AM
MIXER
AM
OSC.
Ripple AM-Osc. FM GND RF GND IF GND Dig. GND RF GND FM-Demod
1 6 3 4 17 26 42 18
10,7MHz
7A-3
AM-DET
2 1
450kHz 450kHz
5114
TEA5762
36 32 19 20
AM-IF2 AM-AFC AFC- AFC+
AFC
AM AM
IF DET
CONTROL
DECODER
XTAL
AGC
OSC
Fieldstrength
AGC AF-Out Indc. MPX-In
44 10 21 25 11
75kHz
3142
7
ANTI BIRDY FILTER
VC0
RDS
1121
VCC2
1
GND
22
VCC2 2
RDS RDS
29
WRITE Enable 3
ENABLE
28
DATA 4
DATA
27
CLOCK 5
CLOCK
31
P1
6
STEREO
39
FM/AM
3
30
P0
Mono/
4
Stereo 24
1124
Left 14
1
LEFT
Mute 13
2
STEREO GND
Right
15
3
RIGHT
PILOT 16
Filter
VC0 LPF
9 12
+FM
4
VCC
VCC1
VDD
VCC2
PCS 69 715