Philips MCM8/21 Service Manual page 28

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
IF1
Frontend Mixer
FM-Osc.
5 FM Pre-
V
Osc.
Loop scaler
AM-Osc.
AM
6
V
Osc.
Loop
AM-FRAME AERIAL
1103 AM-RF
2
AM AM IF
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 AM-IF 2
Vdd Vcc1 Vcc2
450kHz 450kHz
V A V
Stab Stab
7A-1
Vcc1
MPX
buffer ampl.
V B
5
Stab
Vdd
Discriminator
RDS
FM-IF 2
(MPX)
Vcc2
VCO
LF filter
10,7 MHz 10,7 MHz
35 33 18 10 11 9
14
left
15
FM Stereo right
IF2
Det. Decoder
stereo
24
RADIO IC
TEA 5757H
Multi-
plexer
enable 29
data
28
clock 27
AM
CONTROL
Det.
AGC 31
P1
programmable
30
P0
output ports
AFC
Reference
Oscillator
36 44 32 19 20 25
AM-AFC
75kHz
450kHz
2
B V B
Stab
1120
4
left 1
4
right
Vcc
RDS
Version
(MPX)
enable
data
clock
stereo
8
3
ECO6 Systems, 140499