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Schaltpläne und Platinenabbildungen / Circuit Diagrams and Layout of PCBs
Schaltbild / Circuit Diagram
Audio, Tuner
TP
1
TP
4
IC202 LA1805
3
5
1
2
20
17
16
11
13
15
14
Post
FM IF
Det
Phase Det
Trig
LA 1805
Amp
22
RF Amp
Mix
Level Det
Mix
ing
Pilot Det
VCO
AM IF
Det
Tuning
Indic.
Reg.
Osc
AGC
Decoder
23
Drive
Gnd
12
8
19
24
9
6
4
18
10
2 - 3
7
21
VCC
S
FF
FF
FF
CN303
TO CD BOARD
CN5
Stereo
PAGE 2-8
SW
GRUNDIG Service
K-RCD 500
Schaltpläne und Platinenabbildungen / Circuit Diagrams and Layout of PCBs
TP
2
í
DC-VOLTAGES MEASURED AGAINST
CN405
MINUS TERMINAL (GND) AT 230V AC.
...V = CASS. PLAYBACK
TO CD BOARD
CN6
(...V) = CASS. RECORDING
[...V] = RADIO FM-STEREO
PAGE 2-8
THE MEASURED VALUES GIVEN IN THE
CIRCUIT DIAGRAM ARE APPROXIMATES.
2 - 4
IC201 LA1186N
LA 1186
TP
Vref
3
RF
1
2
3
RF-IN
RF-OUT
GND
IC301 BA 3308
BA 3308
-
ch1
+
1
2
3
NF 1
INPUT
OUTPUT
GND
1
1
í
M
START
CASS. DECK
LEAF SW
BAND SWITCH
FUNCTION SWITCH
SW201 A-B
SW401 A-E
AM
CD
FM
RAD
FM ST.
TAP
K-RCD 500
BUFFER
MIX
REG
OSC
4
5
6
7
8
9
GND
IF OUT
OSC
OSC
Vcc
MUTE
-
ch2
+
COM
4
5
6
7
8
9
ALC
Vcc
OUTPUT
INPUT
NF 2
2
2
í
í
í
REC SWITCH
SW301 A-F
RECORD
PLAY
GRUNDIG Service
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