Grundig RCD 400 Serviceanleitung Seite 25

RCD 400
Schaltbild – Tuner / Circuit Diagram – Tuner
C16 C19
ANT
1
K
FM
22P 15P
2
GND
GND 4
GND
3
R134
2.2K
T25
VT 5
BC548B
+12V
6
FM: 1.6V - 8.0V
MW: 1.1V - 8.0V max. 9V
+FM 12V VT
VT AM-RF
D9
III
SVC321SP
R15
L1
10K
1
4
AM
2
IV 10N
6
K
3
C9
GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of the PCBs and Circuit Diagrams
T4
C27
L9
K K
C24
K
8P
0...5P
D13
BF998
10K
R32
FM-FRONT END
+5V
Q1
C17 C23
7.2MHZ C25
K K F
36P 36P 0U1 LC7217
2.3V 1 2.5V 24 6 20
VDD
REFERENZ PHASE
DIVIDER DETECTOR
12 BIT
18
PROGRAMMABLE
DIVIDER
UNIVERSAL
19
COUNTER
1/2
2.6V
SWALLOW COUNTER
1/16, 1/17 4BIT
IC1
LC7217
SHIFT REDISTER LATCH
+5V
2 3 4 5 9 10 11 12 13 14 17 7 8
4.6V
R24
10K
R25
100K
B0
R26 D14
100K 1N4151
B1
R27 D15
100K 1N4151
B2
R28 D16
100K 1N4151
B3
D17
1N4151
RCD 400
F1
C36
T9
K
5P
R56
470R
100R R48
R37 100R
T5
C38
K
2P
R44
10K
T11
C42
K
8P
C44
K
27P
R57
C39
8K2
F
0U47 C45
F
21 R45
0.24V G D 1N
2K2
22
S
16 T7
2SK30AY1
15
23
T8
BC328-25 BC328-25
R52
47K
Bei den in den Schaltplänen angegebenen Meßwerten
handelt es sich um Näherungswerte!
The measured values given in the circuit diagrams are
approximates!
3 - 10 GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of the PCBs and Circuit Diagrams
A
7 R67
100R
IFOUT
+12V
a
F4
10V
F3
3.1V
T16
BF240
3.8V
C71
K
47P
E C72
R74
K
C49
L16
8
K 100K
390P
330N
15P
OSCOUT
T14
VI
VT
+12V
2U2/100V
R62
4K7
22 21 20
1.8V 4.7V
T12
BC548C
VOLT PHASE
COMPARATOR
REG OSC
SYMMETRICAL
REACTANCE
CIRCUIT
FF FF
T13
IC2
LA3401
R63
MUTING
FM AM CHANGE
47K
C111 3.2V 3.2V 3.2V
1 2 3
C
+12V
C55
K
150P
47N
C56
K
27P
C58
2 4
+
F2
1/3 4U7/25V
D
F6
VII
1 6 7 9 10
12
2 3 4 14 8 11
13
B
20
C82
100P
K 2.8V 11
C83
K 2.5V 10
100P
L19
4V 21
39MH
REF
22
4V
L18
C79
+
10U/50V
C81
K
22N
C62
+
C63 C68
+ +
0U47 1U/63V
19 18 17 16 15 14
2.8V 4V 6.2V 2.8V 5V
PILOT DET
VCO STOP
FF FF 90 FF
0
38KHZ 19KHZ 19KHZ
MUTING CONTROL
FM AM CHANGE OVER
DECODER
VCC ON
MUTING
3.2V 5.5V 3.2V 3.2V 5.5V 3.2V
4 5 6 7 8 9
R81 R85
270K 270K
C66
C74
K K
180P 180P
C
3 - 11