Philips MC-70/21 Service Manual page 28

Painel Tuner ECO6
SISTEMA não-CENELEC
versão:
DIAGRAMA EM BLOCOS
PAINEL TUNER
Sistemas ECO 6
V A
Stab
FM-RF FM-IF 1
1101 V
Loop
(1102)
10,7 MHz
D
A FM 3 39 37 35
43
FM FM
IF1
Frontend Mixer
FM-Osc.
FM
5 Pre-
V
Loop Osc. scaler
Multi-
plexer
AM-Osc.
6 AM
V
Osc.
Loop
AM-FRAME AERIAL
1103
AM-RF
2 AM IF
AM AM
Mixer
Frontend
C
V
Loop
1
8 Charge
B
V
pump
Loop
38
V A
Stab
34
Stabilizer
V B
Stab
23 7 22 40 41 36
AM-IF 1 AM-IF 2
Vdd Vcc1 Vcc2
450kHz 450kHz
V A V B
Stab Stab
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
33 18 10 11 9
14
left
FM right 15
Stereo
IF2
Decoder
Det.
stereo
24
RADIO IC
TEA 5757H
Version
enable
29
data 28
clock 27
AM
CONTROL
Det.
AGC
31
P1
programmable
30
P0
output ports
AFC
Reference
Oscillator
44 32 19 20 25
AM-AFC
75kHz
450kHz
2
V B
Stab
1120
4
left 1
4
right
Vcc
RDS
(MPX)
enable
data
clock
stereo
8
3
ECO6 Systems, 140499