EC 4790 CD
RDS DECODER
RDS-CLK
2V4
2V4
2V2
+A
16
15
14
13
RDCL
T57
OSCO
OSCI
AND SYNC
DEVIDER
REGENERATION
OSZILLATOR
CLOCK
GENERATOR
FIXED DIVIDER
BIT
VARIABLE AND
QUALITY-
COSTAS LOOP
DECODER
FILTER
SYMBOL
ALIASING
BIPHASE
ANTI
8305-826-579
DECODER
DIFFERENTIAL
QUAL
RDDA
VREF
MUX
1
2
3
4
2V4
2V4
RDS-CLK
ELAIS-ON
MUTE
CD-SRQ
D_MS_CD
GER-BEEP
NACHT
4MHZ332
RDS-DATA
MPX1
13V8
+5V
FELDST
TAST
UREF
K-SIG
+G
CD-CLK
CD-CS
* CT2062
CD-SLEEP
BC818/40
CR2061
+A
10K
T
* CR2072
CT2071
10K
BC848C
CT2061
BC808/40
+G
+5V
SCL
SDA
GRUNDIG Service
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of the PCBs
4V7
12
11
10
9
VDDD
VSSD
TEST
TSTLD
SELEKTOR SWITCH
SAA6579T
OUTPUT
TESTLOGIC AND
* CIC501
T2301
BC368
COMARATOR
CLOCKED
(8th ORDER)
FILTER
BANDPASS
T2302
RECONSTRUK.
57KHZ
BC368
VOLTAGE
REFERENZ
VP1
VDDA
VSSA
CIN
SCOUT
5
6
7
8
4V7
2V4
2V4
* CC502
* CC507
560P
100N
10V
+G
4MHZ332
LK1
5V0
+U
-30V
D2064
L2060
3
2
BAT41
11
1
10
12
* CR2076
R2067
CT2063
BDP951
100R
1R0
* CR2077
CT2064
100R
BDP951
CR2070
15K
EC 4790 CD
BELEUCHTUNG
ILLUMINATION
R2303
12R
* CT2303
BC848C
* CR2304
2K2
* CR2301
* CD2301
BAS16
100R
* CT2304
BC848C
* CR2302
* CD2302
100R
BAS16
CR2309
CT2306
BC848C
5K6
* CT2307
BC848C
10V
5V0
LK2
+G
F+
F-
-23V
-23V
2V5
AC
ALLE SPANNUNGEN SIND NÄHERUNGSWERTE, GEMESSEN BEI UB=14V GEGEN MINUS
ALL VOLTAGES ARE APPROXIMATES, MEASURED AT UB=14V WITH RESPECT TO NEGATIV
OHNE SIGNAL
WITHOUT SIGNAL
OHNE SIGNAL:AM
WITHOUT SIGNAL:AM
OHNE SIGNAL:FM
WITHOUT SIGNAL:FM
MIT SIGNAL:TB
WITH SIGNAL:TR
3 - 9
GRUNDIG Service
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of the PCBs
* CR2307
470R
5V GESCHALTET
5V SWITCHED
1
* CIC2052
2
L78L05ACD
3
4
* CR2313
22K
14V
5V0
+T
+5V
RESET
5V0
FMP2050
FMP2051
FMP2052
CT2051
BC818/40
8
1
* CIC2051
7
2
L4949
6
3
5
4
CR2054
100K
5V-STROMVERSORGUNG
5V POWER SUPPLY
HAUPTPLATTE 19373-222.00
MAIN BOARD
* = BAUTEILE REFLOWSEITE
8
7
6
5
9V2
+A
+S
14V
9V2
15.07.99
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