1-3
GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
RCD 405
1-4
GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
RCD 405
2.5V
4V
2.5V
2.8V
4V
5V
5V
2.8V
6.2V
4V
2.8V
4.7V
3.2V
5.5V
3.2V
3.2V
5.5V
3.2V
3.2V
3.2V
3.2V
1.8V
10V
3.1V
3.8V
IFOUT
OSCOUT
4.6V
0.24V
2.5V
GND
GND
ANT
VT
+12V
+FM 12V
FM: 1.6V - 8.0V
MW: 1.1V - 8.0V max. 9V
2.3V
2.6V
FM-FRONT END
Bei den in den Schaltplänen angegebenen Meßwerten
handelt es sich um Näherungswerte!
The measured values given in the circuit diagrams are
approximates!
4R7
R76
330R
R75
330R
R77
1K2
R72
560R
R73
100K
R74
5K6
R71
1K5
R84
270K
R81
330K
R82
330K
R83
270K
R85
R88
BC328-25
T8
F4
F3
BF240
T16
K
22N
C69
K
4P7
C67
K
390P
330N
C72
K
47P
C71
K
100P
C83
K
100P
C82
K
22N
C81
K
22N
C85
K
47N
C54
K
47N
C55
K
27P
C56
K
180P
C66
K
180P
C74
K
C7
4.7N
R134
2.2K
R132
56K
BC328-25
T13
14
13
7
6
12
11
8
9
10
3 4
2
1
F6
D23
F
0U33
C61
F
0U1
C57
F
1N5
C59
SHIFT REDISTER LATCH
COUNTER
UNIVERSAL
1/16, 1/17 4BIT
COUNTER
SWALLOW
DIVIDER
PROGRAMMABLE
12 BIT
22
VDD
DETECTOR
PHASE
6
DIVIDER
REFERENZ
1/2
19
18
8
7
17
14
13
12
11
10
9
5
4
3
2
23
15
16
21
20
24
1
1
3
4
6
7
8
L18
R133
33K
100K
R69
21
10
11
RF
REF
22
1
20
F2
CSB456
Q2
39MH
L19
+
10U/50V
C79
+
0U47
C63
+
2U2/100V
C62
+
1U/63V
C68
+
1U/50V
C75
+
10U/25V
C64
+
4U7/25V
C58
+
2U2/25V
C76
+
22U/25V
C53
FM AM CHANGE
MUTING
DECODER
MUTING
VCC ON
FM AM CHANGE OVER
MUTING CONTROL
19KHZ
FF
19KHZ
FF
38KHZ
FF
SWI
STE
TRIG
DRI
LAM
PILOT DET
VCO STOP
FF
FF
CIRCUIT
REACTANCE
SYMMETRICAL
COMPARATOR
PHASE
OSC
REG
VOLT
0
90
LA3401
1
2
3
4
5
6
7
8
9
14
15
16
17
18
19
20
21
22
T25
4.7K
R124
C
150P
C111
2SK30AY1
T7
6
1
2
3
4
L1
B1
B0
B2
B3
4.5-20P
C3
F
1N
C45
F
0U47
C39
F
0U1
C25
Q1
1N4151
D19
1N4151
D15
1N4151
D14
1N4151
D17
1N4151
D16
T5
1
3
4
6
7
8
F1
BF998
T4
L16
L11
L13
L14
L9
L8
L12
SVC321SP
D9
D13
D21
D18
D22
13
67
L15
BC548C
T12
T9
T11
XX
T14
100R
R67
2K7
R41
33K
R31
100K
R29
100K
R33
0...100R
R36
820K...1.5M
R47
33K
R38
33K
R39
10K
R44
100R
R37
10K
R32
10K
R54
1K...2K2
R61
330R
R66
180K...680K
R64
10K
R53
100R
R59
100R
R48
470R
R56
K
22N
C51
K
36P
C23
K
36P
C17
K
10N
C9
K
0U1
C8
K
15P
C19
K
0...5P
C24
K
18P
C21
K
4...10P
C26
K
8P
C27
K
0U22
C22
K
0...5
C34
K
220P
C37
K
22P
C41
K
5P
C36
K
22P
C16
K
2P
C38
K
1P
C43
K
0U22
C18
K
5...10P
C31
K
220P
C28
K
0U22
C29
K
47P
C33
K
0...5P
C35
K
8P
C42
K
27P
C44
K
22P
C47
K
2...4
C46
K
0U22
C48
K
15P
C49
2K2
R65
4K7
R62
8K2
R57
2K2
R55
470R
R49
2K2
R45
10K
R58
47K
R63
100K
R35
100K
R34
10K
R42
47K
R52
10K
R51
100K
R28
100K
R27
100K
R26
100K
R25
10K
R24
10K
R15
6K8
R23
6K8
R22
MUTE
VT
VT
VT
VT
+MW
+MW
+12V
+12V
+12V
AM-IF
AM-IF
FM-IF
FM-IF
AM-RF
AM-RF
AM-OSZ
AM-AF
VCO-STOP
VCO-STOP
+FM
+FM
+5V
+5V
FM-OSZ
FM-OSZ
CL
CE
IF-ENA
IF-ENA
FM-MPX
ANT/CABLE
DA-OUT
DA-IN
S
D
G
A
IV
III
a
VI
E
B
VII
1/3
4
2
DA-OUT
CL
DA-IN
CE
7
8
1
6
5
2
4
3
BC548B
IC2
LA3401
7.2MHZ
FM
AM
C
IC1
LC7217
D
3 - 4
3 - 5
Schaltbild – Tuner-Teil / Circuit Diagram – Tuner Part
