Tuner Board Eco5; Blockdiagram - Marantz SR3000 Service Manual

TUNER BOARD ECO5

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