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Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
Prozessorplatte
Control Board
ON STEREO MODE THE LEVEL IS SET BY THE USER (-79dB UP TO 0 dB)
THE DEFAULT VALUE IS -44dB
ON PROLOGIC MODE THE VALUE IS SET TO -10dB
400 mV (1KHz)
INPUT SELECTOR ALWAYS WITH GAIN = +6 dB
C436
+
2.2U
17
16
TDA7318
8305-847-318
15
(+4.5V)
L1
VOL
14
L2
13
L3
12
L4
INPUT
SELECTOR
+ GAIN
8
R4
9
R3
10
R2
11
R1
VOL
(+4.5V)
SUPPLY
2
3
1
7
6
R445
+12V_R
330
C444
+
2.2U
400 mV (1KHz)
ON STEREO MODE THE LEVEL IS SET BY THE USER (-79dB UP TO 0 dB)
THE DEFAULT VALUE IS -44dB
ON PROLOGIC MODE THE VALUE IS SET TO -10dB
200 mV (1KHz)
+12V
-12V
2 - 3
126 mV (1KHz)
Surround Mode
IC406
19
18
4
SPKR
ATT
C432
25
RB
+
10U
MUTE
SPKR
ATT
BASS
TREBLE
23
MUTE
28
27
I2C BUS DECODER + LATCHES
26
SPKR
ATT
C433
24
BASS
TREBLE
+
10U
MUTE
SPKR
ATT
RB
22
MUTE
21
20
5
126 mV (1KHz)
Surround Mode
+12V
MUTE(FIELD STRENGTH)
16
IC501
Seite/page 2 - 6
15
R458
47K
C455
+
0,47U/100V
-12V
R426
5k6
FROM RECEIVER BOARD
GRUNDIG Service
RBX 1-RF
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
DINAMIC BASS EQUALISATION
PHASE INVERTER
400 mV (1KHz)
Surround Mode
8305-293-560
3
1/2
NJM4560
R433
R434
+
3
0V
+
1/2
NJM4560
C407
1
0V
IC401
47K
47K
1
0V
IC403
2
F
0V
-
2
150nF
0V
-
0V
R436
R432
2k2
47K
R431
C422
F
27P
47K
38
IC501
36
Seite/page 2 - 6
BC338-40
+12V
+12V
C458
F
100N
C425
400 mV (1KHz)
8
F
Surround Mode
5
100nF
+
1/2
NJM4560
0V
8
8305-293-560
7
5
IC401
+
1/2
NJM4560
0V
0V
6
7
IC403
-
0V
0V
4
6
-
R439
0V
4
C424
2k2
F
C457
100nF
F
100N
-12V
-12V
BC338-40
DBE
Av
2.0V
110mV
12dB
40mV
70 Hz
1KHz
+
2 - 4
+12V
Power Amp. left
C401
F
100nF
C404
R404
8
3
+
1/2
NJM4560
+
8305-293-560
0V
R407
470R
1
5
1uF
IC402
+
1/2
NJM4560
0V
0V
R405
2
68K
7
IC402
-
0V
4
0V
470R
6
-
R406
0V
C403
6.8K
R408
F
100nF
2.7K
C405
F
470pF
-12V
T401
R414
R413
D401
100K
1K
1N4148
Surround Mode
400 mV (1KHz)
C480
R480
+
+12V
Power Amp. right
C412
F
100N
C413
C414
1/2
R419
8
3
F
NJM4560
+
+
R422
0V
8305-293-560
470
1
5
150nF
1uF
IC404
1/2
NJM4560
+
R420
0V
0V
2
68k
7
-
IC404
0V
0V
4
470
6
-
R421
0V
C417
6.8K
F
R428
100nF
2.7k
C418
F
470pF
-12V
T402
R424
R447
D402
100k
1k
1n4148
CONTROL BOARD
B
59451-583.94
RBX 1-RF
R468
68K
5
3
2
4
1
P404
1K
20/01/97
GRUNDIG Service
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