Eco6 Tuner Board - Philips mc77 Service Manual

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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
World of free manuals
11/03/2012
BLOCK DIAGRAM
TUNER BOARD
ECO 6
Systems
FM-RF
1101 V
Loop
(1102)
D
3
A FM
43
FM FM
Mixer
Frontend
FM-Osc.
FM
5
V
Osc.
Loop
AM-Osc.
AM
6
V
Osc.
Loop
AM-FRAME AERIAL
1103
AM-RF
2
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
Vdd Vcc1 Vcc2
7A-1
MPX
buffer ampl.
V A V B
5
Stab Stab
Discriminator
FM-IF 1 FM-IF 2
VCO
LF filter
10,7 MHz 10,7 MHz 10,7 MHz
39 37 35 33 18 10 11
FM
Stereo
IF1 IF2
Decoder
Det.
RADIO IC
Pre-
scaler TEA 5757H
Multi-
plexer
AM IF AM
CONTROL
Det.
AGC
programmable
output ports
AFC
Reference
Oscillator
40 41 36 44 32 19 20 25
AM-IF 1 AM-IF 2 AM-AFC
450kHz 450kHz 450kHz
2
V A V B V B
Stab Stab Stab
www.nostatech.nl
Vcc1
Vdd
RDS
(MPX)
Vcc2
1120
4
left 1
9
left 14
15 4
right
right
stereo Vcc
24
RDS
Version
(MPX)
enable
enable 29
data 28 data
clock 27 clock
stereo
8
31
P1
3
30
P0
75kHz
ECO6 Systems, 140499