Philips FW-C280, Руководство по обслуживанию

Страница: 25 / 40

7D-1 7D-1 7D-1
IF1
FM
VCC1
VCC1 VDD VCC2
7
VDD
23
STABILIZER
FM-IF1I In 37
IF2
FM
FM-IF2
35
V Stab B
34 33
FM-IF2I V Stab A
38
AM-MIX Out
40
AM-IF1 In
41 36
AM-IF2
32
AM-AFC
AM
IF
AM
DET
DET
FM
AFC
19
AFC-
20
AFC+
44
AGC
AGC
10
AF-Out
18
FM-Demod
AM
MIXER
2 AM-RF
AM
FRONTEND
AM
OSC.
STEREO
DECODER
CONTROL
MPX-In
11
VC0
3142
9
LPF
12
Right 15
16
Left 14
13 Mute
Stereo
21
Indc.
XTAL
OSC
25
P0 30
39 FM/AM
31
P1
27
CLOCK
28
DATA
29
WRITE Enable
5 FM Osc.
CHARGE
PUMP
8 I-Tune
24
Mono/
FM GND
3 4
RF GND
17
IF GND
26
Dig. GND
42
RF GND
1
Ripple AM-Osc.
MW/LW-SELECTION
6
PILOT
Filter
Fieldstrength
22
VCC2
TEA5762
FM FRONTEND
1102
A
B
+B AGC
6 3
Fo
Osc Out
IF Out Ant1 7 1
GND 4 8
a
F
if
F 10,7 MHz
f
0
= f
in
+ f
if
+FM
MT
MT 5
VT
75kHz
10,7MHz
VC0
IF-AM IF-AM AM-DET
ANTI BIRDY FILTER
2 1
450kHz 450kHz
5111 5112 5114
450kHz
3
DATA
ENABLE
RDS
4
CLOCK
5
STEREO
6
GND
2
1
1121
4
GND
3
2
LEFT
RIGHT
1
VCC
1124
10,7MHz
10,7MHz
2106
5102
MW
5103
LW
3
4
+FM
VCC1
VDD
VCC2
RDS
RDS
AM-RF AM-OSC
5123
MW
5122
LW
7
6
C
TABLE OF CONTENTS
Blockdiagram ..................................................................7D-1
Adjustmant table .............................................................7D-2
Component layout ...........................................................7D-2
Circuit diagram ................................................................7D-3
Partslist ...........................................................................7D-4
TUNER 95 BOARD
BLOCKDIAGRAM