Grundig RR 420 CD Service Manual page 20

Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
IC104 CXP1042
IC301 TA8164P
TA 8164 P
AM FM AM / FM
RM IN RF OUT SW
16 15 14
FM / AM
SW
FM
FM MIX
RF
1 2 3
FM GND1 FM
RF IN MIX
IC501 BA3313L
ALC
2
BA 3313 L
1 3
OUTPUT 1 NF 1
3 - 12
FM AM DET
QUAD
OSC OSC OUT
13 12 11 10
FM OSC AM OSC FM DET
AM DET
AM
AM MIX AGC
IF
4 5 6 7
AM AGC V CC FM
MIX IF IN
GND
N.C. (SUB) VCC FILTER OUTPUT 2
4 6 8 1 0 1 2
ALC
5 7 9 1 1
INPUT 1 GND INPUT 2 NF 2
IC302 TA7343AP
GND2
9
1
AF PHASE DET.
INPUT
PILOT DET.
STEREO
FM
DECODER
IF
TA 7343 AP
* 8
8
L
AM OUTPUT
IF IN
IC601 TA8227P
INPUT 1
NF 1
RIPPLE
INPUT 2
NF 2
LPF
(1)
VCO
2 4
DC VCO 76kHz 1/2
°
19 kHz < 90
STEREO
TRIGGER
SWITCH
°
19 kHz < 0
STABILIZED
38 kHz
POWER SUPPLY
9 6
7 5
R LPF STEREO GND
(2) LED
1 12
3 B. S. 1
IN1
6
+
ch-1
2
OUTPUT 1
45Ω
-
5
30kΩ
NF1
BIAS CIRCUIT
RIPPLE
9 THERMAL SCHUT DOWN 4 POWER GND
PROTECTION CIRCUIT
IN2
7
+
ch-2
11 OUTPUT 2
45Ω
-
8
NF2
10
B. S. 2
30kΩ
GRUNDIG Service
RR 420 CD
1/2
1/2
3
Vcc