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BLOCKDIAGRAM
TUNER BOARD
ECO 5
1101
(1102)
A
FM
FM-Osc.
V
Loop
AM-Osc.
V
AM-FRAME AERIAL
Loop
1103
AM-RF
V
B
V
V
Stab
V
Stab
7-3
systems
V
A
Stab
FM-RF
V
Loop
10,7 MHz
3
39
37
43
FM
FM
frontend
Mixer
FM
Pre-
5
Osc.
scaler
AM
6
Osc.
2
AM
AM
Frontend
Mixer
C
Loop
1
8
Charge
pump
Loop
38
A
34
B
23
7
22
40
41
Vdd Vcc1
Vcc2
450kHz
V
A
Stab
buffer ampl.
V
B
Stab
Discriminator
5
LF filter
10,7 MHz
10,7 MHz
35
33
18
10
FM
IF2
IF1
Det.
RADIO IC
TEA 5757T
Multi-
plexer
AM IF
AM
Det.
AGC
AFC
36
44
32
19
20
450kHz
450kHz
2
V
B
V
B
Stab
Stab
7-3
Vcc1
Vdd
RDS
Vcc2
(MPX)
VCO
4
11
9
15
right
4
14
Stereo
left
Decoder
stereo
Version
24
stereo
clock
27
clock
data
28
data
enable
29
enable
CONTROL
31
P1
programmable
30
P0
output ports
Reference
MW/LW
Oscillator
25
AM-RF,
AM-Osc.
75kHz
1124
Vcc
4
right
left
1
3
1126
1121
4
6
1
RDS
(MPX)
1
ECO5 sys., 240698
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