EC 4790 CD
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of the PCBs
EC 4790 CD
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of the PCBs
GRUNDIG Service
3 - 5
GRUNDIG Service
3 - 6
1
3
7
8
L613A
1
3
7
8
L612A
1
3
7
8
F105
+
22U/16V
C665A
+
22U/16V
C618A
+
22U/16V
C657A
BC848C
CT613A
*
CT125
BC848C
* CT126
BC848C
BC848C
CT617A
+
100U/6V3
C704
*
CC658A
4N7
3P9
10N
CC13
4P7
CC17
*
CC15
COG
1N0
* CC16
6P8
*
CC18
COG
1N0
220P
CC633A
* CC102
22N
100N
CC105
8P2
CC14
100P
CC107
22P
CC644A
*
CC616A
10N
*
CC613A
4N7
*
CC619A
47N
100N
CC632A
* CC636A
22N
150P
CC643A
22N
CC638A
22N
CC637A
COG
2N2
CC651A
33N
CC654A
47N
CC653A
270P
CC634A
100N
CC617A
100N
CC631A
100N
CC646A
22N
CC648A
10N
CC19
*
CC104
68P
*
CC101
22N
100N
CC103
100N
CC106
18N
CC711
1N0
CC709
*
CC720
10N
4N7
CC655A
100N
CC120
*
CC130
100N
100N
CC712A
100N
CC713A
27P
CC715
100N
CC705A
* CC620A
470P
82P
CC714
10N
CC125
*
CC708
100P
*
CC702
100P
*
CC701
10P
100N
CC703
100N
CC706
*
CR681
47K
*
CR664A
47K
3K3
CR116
150R
CR101
*
CR11
10K
*
CR10
4K7
8K2
CR117
3K3
CR113
8K2
CR112
3K3
CR111
470R
CR120
820R
CR121
8K2
CR114
* CR103
390R
2K7
CR108
10R
CR106
22R
CR652A
150R
CR102
470R
CR122
*
CR622A
82R
22K
CR641A
47K
CR643A
*
CR663A
2K2
10K
CR644A
22K
CR672A
22R
CR624A
*
CR621A
120R
*
CR623A
10R
3K3
CR639A
1K8
CR667A
1K0
CR671A
*
CR646A
22R
10K
CR642A
*
CR107
4K7
3K3
CR713
* CR12
470R
*
CR711
10K
*
CR661A
4K7
*
CR712
10K
1K2
CR710
*
CR675A
2K2
15K
CR704
56K
CR706A
*
CR682
4K7
3K3
CR707
* CR125
10K
* CR660A
47K
10K
CR705A
47K
CR126
* CR701
220R
*
CR702
22R
33R
CR703
1K2
CR708
2K2
CR709A
* CL606A
8UH2
*
CL605A
4UH7
+
1U0/50V
C118
* CT620A
47K
DTA143ZK
4K7
4MHZ
Q701
* CT608A
47K
DTC143ZK
4K7
+
2U2/35V
C656A
1
2
3
4
L04
SCL
SDA
AD
SWO1
SWO2
FMOSC
AMOSC
PDFMA
PDFM
PDAM
PDAMA
IN
OUT
2
GND2
GND1
VDD
OUTPUTS
ANALOGUE
SOURCES
CURRENT
DETECTOR
PHASE
LATCH
STATUS
OUTPUTS
SWITCHING
AM/FM-SWITCH
PREAMPLIFIER :2
PREAMPLIFIER
N-DIVIDER
R-DIVIDER
OSCILLATOR
LATCH
SHIFT REG.
LATCH
INTERFACE
I C-BUS
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
* CIC701
U4286BM-FB
1
2
4
6
8
*
CR105
100K
FMP636
FMP103
FMP106
FMP113
FMP107
FMP01
FMP658
FMP116
FMP624
FMP111
FMP122
FMP663
FMP108
FMP626
FMP121
FMP672
FMP104
FMP102
FMP618
FMP639
FMP646
MP606
FMP115
7
8
1
3
4
6
F601A
+
100U/10V
C717
+
100U/10V
C707
1MHZ
50khz
DEMOD.
QUADRATUR
KOMP.
KLIRRFAKT-
DETEKTOR
VERSTIMM-
FM-AUS
SCHALTUNG
STUMM-
STOP-LOGIK
ABSTIMM-
UREF
U
ST
DETEKTOR
PEGEL-
VERSTAERKER
ZF-
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
* CIC101
TDA1593T
3
2
1
MS3A10K-A
F102
3
2
1
MS3A10K-A
F103
3
2
1
MS3A10K-A
F104
* CT623A
BC808/40
* CT662A
BC808/40
BB512
CD608A
3
2
1
PFB450H3
F602A
7K
220R
170R
7K
VR
V1
V2
V3
V1
+
V3
V2
VR(AGC)
3K5
25R
VR(AGC)
3K
RF STAGE
CONTROLLED
GAIN-
MIXER
BALANCED
DOUBLE
STANDBY
TROLLED IF
GAIN CON-
VOLTAGES
SUPPLY
INTERNAL
BALANCED
FULL-WAVE
DRIVER
SWITCH
AMPLIFIER
DETECTOR
OSCILLATOR
CONTROLLED
AMPLIFIER
AF PRE-
INDIKATOR
AMPLIFIER
AGC
10
9
8
7
6
5
4
3
2
1
16
15
14
13
12
11
* CIC601A
TDA1072AT
+
10U/16V
C660A
+
10U/16V
C111
IF AMPLIFIER
OSZ.
300R
BUFFER
OSCILLATOR
950R
300R
1,7V
+
VOLTAGE
REFERENCE
13
12
11
10
9
8
7
6
5
4
* CIC01
TDA1575T
BB814
CD06
1N
CC660A
+G
FM-OSZ
FM-OSZ
SDA
MPX1
SCL
UREF
K-SIG
STOP
AM-OSZ
AM-OSZ
MUTE
AM-ABST
AM-ABST
FELDST
FELDST
+AM
+AM
+FM
+FM
AM-NF
+S
+S
MPX
FM-ABST
+
100U/10V
C718
+
100U/10V
C719
MW=9V
LW=0V
15.07.99
HAUPTPLATTE 19373-222.00
4V2
2V0
2V3
3V9
2V7
3V0
8V9
1V2
1V2
1V8
4V0
1V7
639
121
122
115
11
6
3
2
7
1
8
11
6
3
2
1
8
7
1V8
1V8
1V8
3V9
4V2
4V4
7V7
1V3
1V2
8V7
8V7
W: 1V0...5V0
W: 1V2...7V8
6
7V8
0V8
0V7
4V1
4V1
8V2
2V0
0V8
1V0
2V1
2V1
2V1
8V18
FM=9V
AM=0V
3V7
3V7
ZF / IF
AM
PLL
4V5
1V9
2V5
2V5
MAIN BOARD
WITH SIGNAL:TR
MIT SIGNAL:TB
WITHOUT SIGNAL:FM
OHNE SIGNAL:FM
OHNE SIGNAL:AM
WITHOUT SIGNAL:AM
WITHOUT SIGNAL
OHNE SIGNAL
* = BAUTEILE REFLOWSEITE
LW
MW
ALL VOLTAGES ARE APPROXIMATES, MEASURED AT UB=14V WITH RESPECT TO NEGATIV
ALLE SPANNUNGEN SIND NÄHERUNGSWERTE, GEMESSEN BEI UB=14V GEGEN MINUS
9V (FM)
0V (AM)
9V (FM)
0V (AM)
0V (FM)
9V (AM)
9V2
9V2
5V0