Table of Contents
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7B-1
TUNER BOARD ECO5
TABLE OF CONTENTS
Blockdiagram ..................................................................7B-1
Adjustmant table .............................................................7B-2
Component layout ...........................................................7B-2
Circuit diagram ................................................................7B-3
Partslist ...........................................................................7B-4
7B-1
BLOCKDIAGRAM
TUNER BOARD
ECO 5
systems
FM-RF
V
1101
Loop
(1102)
A
FM
3
43
FM
FM
frontend
Mixer
FM-Osc.
FM
5
V
Osc.
Loop
AM-Osc.
AM
6
V
AM-FRAME AERIAL
Osc.
Loop
1103
AM-RF
2
AM
AM
Frontend
Mixer
C
V
Loop
B
1
8
Charge
V
pump
Loop
38
V
A
Stab
34
V
B
Stab
23
7
Vdd Vcc1
Vcc2
buffer ampl.
V
A
V
B
Stab
Stab
Discriminator
5
RDS
(MPX)
LF filter
10,7 MHz
10,7 MHz
10,7 MHz
39
37
35
33
18
10
11
FM
IF2
IF1
Det.
RADIO IC
Pre-
scaler
TEA 5757T
Multi-
plexer
AM IF
AM
CONTROL
Det.
AGC
AFC
Reference
22
40
41
36
44
32
19
20
450kHz
450kHz
450kHz
2
V
A
V
B
V
B
Stab
Stab
Stab
7B-1
Vcc1
Vdd
Vcc2
VCO
1124
Vcc
4
4
right
9
15
right
14
4
Stereo
left
left
1
Decoder
stereo
Version
24
3
1126
1121
stereo
4
6
clock
27
clock
data
28
data
enable
29
enable
1
RDS
(MPX)
1
31
P1
programmable
30
output ports
P0
MW/LW
Oscillator
25
AM-RF,
AM-Osc.
75kHz
ECO5 sys., 240698
CS 52 930
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