Philips LX7000SA Service Manual page 24

ECO6 Tuner Board
SYSTEMS non-CENELEC
version:
TABLE OF CONTENTS
Blockdiagram ..................................................................7A-1
Schematic Diagram .........................................................7A-2
Component Layout..........................................................7A-3
Adjustment table .............................................................7A-3
Electrical Partslist ............................................................7A-4
7A-1
BLOCK DIAGRAM
TUNER BOARD
ECO 6
Systems
V A
Stab
FM-RF FM-IF 1
V
1101
Loop
(1102)
10,7 MHz
D
3 39 37
A FM
43 FM FM
Frontend Mixer
FM-Osc.
FM
5 Pre-
V
Osc.
Loop scaler
AM-Osc.
AM
6
V
Osc.
Loop
AM-FRAME AERIAL
1103
AM-RF
2
AM AM
Frontend Mixer
C
V
Loop
1
8 Charge
B
V
pump
Loop
38
V A
Stab
34
Stabilizer
V B
Stab
23 7 22 40 41
AM-IF 1
Vdd Vcc1 Vcc2
450kHz
V A
Stab
7A-1
MPX
buffer ampl.
V B
5
Stab
Discriminator
RDS
FM-IF 2
(MPX)
VCO
LF filter
10,7 MHz 10,7 MHz
35 33 18 10 11 9
FM Stereo right
IF1 IF2
Decoder
Det.
stereo
RADIO IC
TEA 5757H
Multi-
plexer
enable
clock
AM IF AM
CONTROL
Det.
AGC
programmable
output ports
AFC
Reference
Oscillator
36 44 32 19 20 25
AM-IF 2 AM-AFC
75kHz
450kHz 450kHz
2
V B V B
Stab Stab
Vcc1
Vdd
Vcc2
1120
4
left 1
14
left
4
15
right
Vcc
24
RDS
Version
(MPX)
29 enable
data 28 data
27 clock
stereo
8
31
P1
3
30
P0
ECO6 Systems, 140499