Ic Block Diagrams - Grundig K-RCD 120 Serviceanleitung

Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
IC-Blockdiagramme

IC Block Diagrams

IC101 AN7205
AN 7205
Bias
RF AMP MIX OSC
Circuit
1 2 3 4 5 6 7 8 8
IC102 AN7024
2 4 6 8 10 12 14 16
ST
MPX
Quad Ind.
OSC
Demod
Det Drive
Vr
AM
Det
AM AP Phase
Det
MIX Amp. Det
AGC
AM
AM FM/AM DC
VCO
Hi-cut
RF IF Amp. Amp.
1 3 5 7 9 11 13 15
IC201 AN7312
Vcc
14 13 12 11 10 9 8
Amp.
Ripple Filter
Ch2
ALC
Amp.
Ch1
AN7312
1 2 3 4 5 6 7
GND
IC202 TA7769P
9 10 11 12 13 14 15
THERMAL
PROTECT.
-
1 1
START
+
CIRCUIT
8
DECOUPLING
7
+
2 2
-
TA 7769 P
6 5 4 3 2
3 - 11
IC801 KA9220B
ISET NC BPF EFMO AASC
22 35 26 38 37
24
NC
KA 9220B
EFM
COMPARATOR
VREGI 21
VREG 23
NC 36
NC 14
LOCK 31
SMPD 12
CLV
SMON 13
LPF
SMEF 25
GND
SPDI 43
18
_
+
DVCC 55
DEFECT AMP
& COMPARATOR
AN 7024
SPDO 44
WDCH 11
FF
APC AMP
19kHz
FDFCT 58
FF RF AMP
NC 4
38kHz
LDON 60
17
65 66 67 78 70
Vcc
RFI RFO RF- P/N LD
IC802 KS9282B
KS 9282B
EFMI 66
EFM Phase
Detector
APDO1 67
VCOI1 78
DPDO 2
FII 3
CPLL
FIO 4
CLTV 5
DSPEED 79
SMEF 72
SMON 73
CLV
SMPD 75
Servo
SMSD 76
LOCK 70
XIN 8
XOUT 9
MLT 36
CPU
16
MDAT 37
Interface
1
MCK 38
ISTAT 68
TRCENT 69
GRUNDIG Service
K-RCD 120 Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
DVEE MCK MLT MDAT RESET DIRC TRCNT VEE NC ISTAT PFSET CBH CPPH
64 27 28 29 30 9 32 34 6 33 7 3 2
MIRROR
CMOS TO
TTL TO CMOS
AMP &
TTL
COMPARATOR
MICOM TO SERVO CONTROL
AUTO SEQUENCER
FS1 TO1 TM1 TO2
TG1 TO2 PS1 TO4
WINDOW
COMPARATOR
FOCUS OK AMP
& COMPARATOR
TRACKING
ERROR AMP
FOCUS
ERROR AMP
71 75 74 69 73 77 76 62 61 68 79 80 1
PD PD1 PD2 CV NC E F EO EI RV CC1 CC2 AVEE FBIAS
26 32 33 28 29
30 SQDT
Subcode
Subcode Subcode Q
sync
Outpput Register
Decoder 31 SQCK
23bits Shift EFM
Register Demodulator
Frame
sync GCC
Detector
Protector
Inserter
16k SRAM
SRAW
Address
x-tal
Interpolator
Timing
Counter
Track
Counter Digital
Filter
(8 x sampl.)
17 VREF1
Digital D/A
Output
Converter
22 VREH1
7 19 20
3 - 12
NC SSTOP SLEI SLEO SLEN TEST2
5 8 41 40 39 42
10 AVCC
–
+
72 AVCC
47 TKEI
–
48 TKEO
+
54 TDFCT
15 TGSW
TRACKING
PHASE
COMPENSATION
16 RTO
52 TE2
+
–
51 TZC
50 ATS
53 TE1
49 NC
58 FDFCT
FOCUS PHASE
COMPENSATION
20 FSCH
+
46 FSEO
–
45 FCE
63 57 56 19 18 17
FE1 FE2 HFCD FSW LPR
IC803 KA9270
LPF
OUTPUT2 LPF2B VREF RIPPLE
20 19 18 17 15
VCC
–
LPF2 LPF2
+
–
+
1/2VCC-AMP
+
–
MUTE DE-EM
LPF1
SW SW
1 2 3 4 5
GND LPF LPF1B MUTE DE-EMPHA
OUTPUT1 CONTROL CONTROL
INPUT INPUT
IC805 KA9258
28 27 26 25 24 23 22
KA 9258D
_
+
_
+
LEVEL
SHIFT
_
+
T.S D
REGULATOR
MUTE
_ _
+ +
LEVEL
SHIFT
_
+
10K
1 2 3 4 5 6 7
K-RCD 120
DE-EMPHA DE-EMPHA DE-EMPHA BUFFER
CTL OUT IN2 OUT2 INPUT2
15 14 13 12 11
–
+
DE-AMP 2
BUFFER2
–
+
KA 9270
+
–
BUFFER1
DE-AMP 1
+
–
6 7 8 9 10
DE-EMPHA DE-EMPHA DE-EMPHA BUFFER 10INPUT1
CTL OUT1 IN1 OUT1
21 20 19 18 17 16 15
_
+
LEVEL
SHIFT
_
+
_
+
_
+
LEVEL
SHIFT
50K
_
+
8 9 10 11 12 13 14
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