Inhaltsverzeichnis
Werbung
EC 4790 CD
L04
3
1
4
7
2
* CC16
* CR12
470R
6P8
1V7
4V0
1V8
1V2
1V2
4
5
6
7
8
OSZ.
REFERENCE
VOLTAGE
OSCILLATOR
1,7V
BUFFER
+
TDA1575T
950R
* CIC01
IF AMPLIFIER
300R
300R
13
12
11
10
9
8V7
8V7
1V2
1V3
4V4
7V7
MS3A10K-A
F104
FMP104
CR121
1
3
2
MS3A10K-A
F102
FMP102
CR101
1
3
2
4
150R
2
8
1
6
8
FM-OSZ
W: 1V2...7V8
FMP646
W: 1V0...5V0
AM-ABST
+AM
FMP639
F601A
3
4
F602A
1
3
CR624A
FMP618
PFB450H3
7V8
22R
7
1
6
8
6
MP606
8V18
1
2
* CIC601A
* CC620A
DOUBLE
STANDBY
BALANCED
SWITCH
470P
MIXER
* CL606A
+
8UH2
GAIN-
CONTROLLED
RF STAGE
16
15
3V7
* CC636A
FMP636
22N
CR639A
CD608A
CC631A
CC633A
3K3
BB512
100N
220P
CT613A
BC848C
* CT608A
DTC143ZK
4K7
AM
CR642A
10K
639
8
1
7
GRUNDIG Service
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of the PCBs
ZF / IF
*
CT125
BC848C
* CC102
22N
* CR103
1V8
390R
1V8
1V8
20
19
18
17
16
ZF-
* CIC101
VERSTAERKER
PEGEL-
DETEKTOR
TDA1593T
U
ST
UREF
FMP103
1
2
3
4
8V9
3V0
2V7
MS3A10K-A
F103
FMP106
FMP121
1
3
820R
2
6
FMP113
FMP107
9V (FM)
0V (AM)
AM-NF
FMP672
CR672A
22K
0V (FM)
9V (AM)
1
FMP658
2
1V0
2V1
2V1
2V1
0V8
2V0
3
4
5
6
7
8
7K
7K
3K
V2
VR(AGC)
VR
GAIN CON-
BALANCED
AF PRE-
AGC
TROLLED IF
FULL-WAVE
AMPLIFIER
AMPLIFIER
AMPLIFIER
DETECTOR
TDA1072AT
INDIKATOR
VR(AGC)
V1
V2
V3
DRIVER
CONTROLLED
OSCILLATOR
V3
INTERNAL
SUPPLY
VOLTAGES
V1
14
13
12
11
10
9
3V7
8V2
4V1
4V1
0V7
0V8
8
1
7
2
LW=0V
MW
MW=9V
FMP663
3
CT617A
8
1
7
BC848C
* CR660A
LW
3
47K
CC646A
3
100N
121
2
6
3
EC 4790 CD
* CR125
CR126
* CT126
BC848C
10K
47K
FMP115
3V9
4V2
15
14
13
12
11
ABSTIMM-
QUADRATUR
STOP-LOGIK
DEMOD.
8
1
FM-AUS
VERSTIMM-
50khz
STUMM-
DETEKTOR
SCHALTUNG
KLIRRFAKT-
3
1MHZ
KOMP.
5
6
7
8
9
10
3V9
2V3
2V0
4V2
FMP122
FMP116
FMP111
FMP108
9V2
9V (FM)
0V (AM)
* CT662A
BC808/40
* CT623A
BC808/40
FM=9V
AM=0V
* CT620A
FMP624
DTA143ZK
FMP626
4K7
122
115
3 - 5
GRUNDIG Service
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of the PCBs
ALLE SPANNUNGEN SIND NÄHERUNGSWERTE, GEMESSEN BEI UB=14V GEGEN MINUS
7
ALL VOLTAGES ARE APPROXIMATES, MEASURED AT UB=14V WITH RESPECT TO NEGATIV
11
OHNE SIGNAL
WITHOUT SIGNAL
F105
OHNE SIGNAL:AM
WITHOUT SIGNAL:AM
OHNE SIGNAL:FM
WITHOUT SIGNAL:FM
MIT SIGNAL:TB
WITH SIGNAL:TR
HAUPTPLATTE 19373-222.00
MAIN BOARD
* = BAUTEILE REFLOWSEITE
FM-OSZ
PLL
* CR701
220R
FMP01
8
7
6
5
4
3
GND2
FMOSC
SWO2
SWO1
AD
SDA
PREAMPLIFIER :2
OUTPUTS
INTERFACE
SWITCHING
I C-BUS
2
AM/FM-SWITCH
LATCH
STATUS
LATCH
SHIFT REG.
LATCH
N-DIVIDER
R-DIVIDER
OUTPUTS
PREAMPLIFIER
ANALOGUE
DETECTOR
PHASE
SOURCES
CURRENT
OSCILLATOR
AMOSC
PDFMA
PDFM
PDAM
PDAMA
IN
9
10
11
12
13
14
1V9
2V5
Q701
4MHZ
11
5V0
9V2
4V5
2
1
SCL
U4286BM-FB
* CIC701
OUT
15
16
2V5
CR710
1K2
CR708
1K2
CR709A
2K2
15.07.99
3 - 6
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Inhaltsverzeichnis
