Philips FR-975, Руководство по обслуживанию

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7B-1
CS52 930
TABLE OF CONTENTS
Blockdiagram ......................................................... 7B-1
Component layout ................................................... 7B-2
Adjustmanttable ...................................................... 7B-2
Circuit diagram ........................................................ 7B-3
Partslist .................................................................... 7B-4
TUNER BOARD ECO5
7B-1 7B-1
1
FM
frontend
AM
Frontend
FM
Osc.
FM
Mixer
AM
Mixer
AM
Osc.
AM IF
IF1
IF2
FM
Det.
AM
Det.
2
3 39 37 33
FM
RADIO IC
TEA 5757T
TUNER BOARD
ECO 5
systems
1101
(1102) LF filter
10 18 11
15
14
24
left
left
buffer ampl.
RDS
(MPX)
RDS
(MPX)
right
right
stereo
VCO
41 40 36 19 32 44 25
Stereo
Decoder
1124
Vcc1
Vdd
Vcc2
AFC
AFC + AFC -
4
4
AGC
Pre-
scaler
Multi-
plexer
Charge
pump
CONTROL
AM-FRAME AERIAL
Reference
Oscillator
1126
1
4
1
4 6
1
stereo
27
28
29
clock
data
enable
clock
data
enable
Version
P1
P0
MW/LW
31
30
programmable
output ports
AM-RF,
AM-Osc.
3
5
1121
V
Loop
V
Loop
V
Loop
V
Loop
V
Loop
2
6
5
43
1103
B
C
450kHz 450kHz 450kHz
20
75kHz
V
Stab
A V
Stab
B V
Stab
B
V
Stab
A V
Stab
B
10,7 MHz 10,7 MHz
35 9
Vcc
Vdd Vcc1
7 23
V
Stab
A
V
Stab
B
38
34
22
Vcc2
8
ECO5 sys., 240698
A
AM-RF
AM-Osc.
FM-Osc.
FM-RF
Discriminator
10,7 MHz
BLOCKDIAGRAM
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