Grundig RCD-1420-MP-3 Service Manual
Service Document
Exchange Set
RCD 1420 MP3
Service
Manual
Sicherheit
Safety
Materialnr./Part No.
720108000001
Dieses Service Dokument ist nur in Datenform verfügbar
This Service Document is only available as data
Änderungen vorbehalten/Subject to alteration
Made by GRUNDIG in Germany • H-S43 1204
http://www.grundig.com
Es gelten die Vorschriften und Sicherheitshinweise
gemäß dem Service Manual "Sicherheit", Material-
S
nummer 720108000001, sowie zusätzlich die eventuell abweichenden, landesspezifischen Vorschriften!
The regulations and safety instructions shall be
valid as provided by the "Safety" Service Manual,
S
part number 720108000001, as well as the
respective national deviations.
ǵ
FM ANT.
TUNER
IC601
KEY BOARD
LCD DISPLAY
uP
U701
AUDIO
CONTROL
VR401
MUTING
CIRCUIT
Q103 Q104
POWER
AMPLIER
IC101
SPEAKER
FUNCTION SWITCH
SW601 Q105 Q106
CD
MECHANISM
ǵ
DA11
CD SERVO SYSTEM
+ MP3 DECODER
U702 U703 U705 U706
5V
7.5V
10.5V
POWER
SUPPLY
Q108 Q109
Q110 Q111
Q112 Q113
AC
SUPPLY
RCD 1420 MP3
ǵ
RCD 1420 MP3
TO CD BOARD CN713
CN501
12345678910111213
CN502
1
+7V
DGND
2
3
AD2
AD1
4
CN713
1
2
3
4
5
6
7
8
9
10
11
12
13
TO KEY BOARD CN501
TO CD DOOR SW
CN708
1
DOOR SW
GND
2
CN710
1
2
3
4
TO KEY BOARD CN502
TO TUNER MAIN BOARD
2K7
R503
K504
UP/FF
2K7
R513
K514
DIR/M.DN
C1
C2
C3
C4
S1
S2
S3
S4
S5
S6
S7
S8
S9
R795
10K
R796
D704
R802
4148
R801
10K
10K
D702
4148
R811
47K
LCD701
18 : 8. 8
123456789101112131415
R520
390
D501
LED
1K5
R5022KR501
K503
K502
STOP/BAND
R5122KR511
K513
PROG/MEM
1K5
K512
K501
PLAY/PAUSE
K511
MODE
DOWN/REW
DIR/M.UP
7V+
C788
470u
R770
WIRE
R768 68K
R767 68K
R766 68K
R765 68K
R764 62K
10uH
L713
C741
10n
3V3
R725 10K
R724 10K
R723 10K
R722 10K
+
+
R788
22K
R721 10K
R720 10K
R719 10K
3V3
Q701
8550C
C751
10n
R706
1K
10K
R787
+
C722
220u
TO CD PUH(SANYO DA11V)
R763 15K
R762 15K
R761 15K
R760 15K
R718 10K
R717 10K
AD15AD16
AD17
AD13
AD08
AD09
AD11
AD19
AD10
AD18
R786
+
47K
C752
100u
Q702
9014C
CN702
16
FCTR-
15
14
TR+
13
FC+
12
PD
VR
11
LD
10
GND
9
F
8
C
7
B
6
5
A
D
4
E
3
2
VCC
1
VC
IO7
IO6
IO5
IO4
IO3
U709 7805
OUT IN
G
100n
100n
C717
C718
C715
C716
+
+
100u
220u
12-Oct-2004
47n
R702
10K
R701
10K
C760
56P
+
47u
R798
220
U706
MM1469PH
R803
RFO
T3
+C739
R778
18K
R779
1K
C727
47u
C746
28
27
GND
FM-1FM+2FMO3(FMO)4TRB5TREG6MUT7GND8(DMO)9DMO10DM+
220
TEO
T4
T2
FEO
R774
C748 220n
C747 220n
R775
220
C744
2P
R777
2K2
AD14
AD12
AD07
AD06
AD05
AD04
AD03
AD02
AD01
AD00
IO0
IO1
IO2
C730
47u
L706
L705
+
+
23
18
20
24
30
26
22
25
FC-
FC+
FOO
BIAS
(FOO)
R773
C749
4n7
33K
C794
100n
C745
100n
R776
43K
R744 10K
R743 10K
L707
47uH
+
47uH
47uH
C726
47u
L704
47uH
16
15
19
17
TR-
TR+
OPI-
TRO
OPI+
VCC121VCC2
(TRO)
GND4
DM-12GND213OPOUT
GND3
14
11
29
R799
220
1K
TA2153FN
U703
16
SBAD
FEO
17
TEO
FEN
18
TEN
SEB
19
2VRO
VRO
20
RERP
TEB
21
BTC
SEL
22
RFCT
LDO
23
PKC
MDI
24
RFRPIN
TNI
25
TPI
RFGO
26
FPI
GVSW
27
FNI
AGCIN
28
GMAD
RFO
29
RFGC
GND
30
VCC3
RFN2
R735 10K
R734 10K
R733 10K
R732 10K
R742 10K
R731 10K
R741 10K
R740 10K
R739 10K
R716
10K
+
C720
47u
R714
+
C719
10u
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R715
33
Q707
TL431
R713
33
Q708
10K
TL431
R772
15
56K
14
13
12
11
10
9
8
7
6
5
4
3
2
1
IO(0-7)
AD(00-19)
128K X 8 (15ns)
1M SRAM ( SOJ)
U705
NC
AD16
AD15
AD14
AD12
AD7
AD13
AD6
AD5
AD4
AD11
AD3
AD10
AD2
AD1
AD0
IO1
IO2
IO3
GND16IO4
C732
C731
+
C728
+
220u
CN709
6
SLTSLT+
5
FM+
4
FM-
3
DM-
2
1
DM+
6PINS
TO CD MECHANISM
C750
+
100u
Q706
9015C
L708
10uH
C743
+ C742
10n
32
3V3
31
30
CE2
29
WE
28
27
AD8
26
AD9
25
24
OE
23
22
CE1
21
IO8
20
IO7
19
IO6
18
IO5
17
100n
47u
C729
100n
U708
B1117N
+7V
R-CH
AGND
L-CH
R771 15
62K
R769
47u
R730 10K
R729 10K
R728 10K
R727 10K
R726 10K
L703
47uH
OUTIN
G
L702
47uH
C721
47u
84
83
85
LO
DVRL
DVDD
+5V46GND47P2VREF48PDO49TMAX
55
GNDP
+
+
C709
47u
16.93MHz
R790
560
X701
C799
15P
15P
C780
C783
C782
100u
+
100n
C781
100n
R789
10
81
82
RO
DVSR
DVRR
80
X+5V
79
XO
XI
XGND
GND
+5V
SEL
2VREF
DMO
FMO
TEBC
RFGC
VREF
TRO
FDO
TEZI
TEI
SBAD
FEI
RFRP
RFZI
RFCT
A+5V
RFI
SLCO
AGND
VCOF
RVREF
LPFO
LPFN
50
R784
10K
C771
C769
+
+
47u
47u
330n
C735
51
52
io249io350io4
io553io654io7
2V5
32
R710
C710
100n
R708
220
10n
78
C778
77
76
75
74
73
72
71
70
69
68
67
R780 10K
66
65
64
63
62
61
60
59
58
57
56
C7652n7
55
54
53
10n
C766
C762
52
10n
51
R782
R783
47K
47P
C768
C761
47u
C734
100n
C733
100n
GND
io1
io0
AD15
AD16
WR
AD14
AD13
VSS
REQ
AD6
AD7
AD8
3V3T
AD9
AD10
R712
R709
220
C705
2n2
C708
2n2
220K
+
AGND(PLL)
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
3V3
10K
R707
220
+
C763
R781
15K
47u
C767
15n
R797
10K
R736
10K
100n
C714
R711
10K
+
220
C703
C704
10u
2n2
C707
10u
2n2
C706
+
47n
C777
47n
C776
47n
C775
47n
C774
R804
3K3
470P
C773
C772
470P
C759
47u
C764
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
AD15
AD16
AD17
AD14
AD13
AD06
AD07
AD08
AD09
AD10
AD11
AD12
T5 REGO
4n7
T1
VREF
R807
68K
68K
R808
100P
C785
R737
2K7
R791
C724
15P
75KHz
96
94
95
M+5V
COM197COM298COM399COM4
MGND
TC94A09F-209
PLLDATA
10K
2K2
2M2
10K
100n
64
RESET
MIMD
AD0
AD1
SDA
SCL
AD2
3V3T
SDo
AD3
AD4
SDIo
BCKiO
LRCKiO
AD5
CE
100n
C712
C784
93
92
90
91
RST
MXI
MXO
HOLD
REMOTE
U701
NC
38
60
63
62
61
xi
xo
Cko
2V5X
GNDX
TC94A02F-007
OE172V518STANDBY19VSS20VSSL21VRAL
C711
47u
10K
100n
R738
2K
87
89
86
NC88NC
DVSL
45
C770
10n
270
R746
R745
270
57
56
58
59
Pdo
Vco1
2V5P
U702
LD232V5L242V5R25RO26VRAR27VSSR28TESTP29CKS30AD1231AD11
22
+
47u
C725
C723
15P
C786
10n
1
S1
2
S2
3
S3
4
S4
5
S5
6
S6
7
S7
8
S8
9
S9
10
S10
11
S11
12
S12
13
S13
14
LRCK
15
BCK
16
DATA
17
DOOR-SW
18
INNER-SW
19
+5V
20
GND
21
POWER OUT
22
CDRW/STEREO
23
FUNCT A
24
FUNCT B
25
EQ1
26
KEY-AD1
27
KEY-ED2
28
TUNER BAND
29
PUH SELECT
30
REQ
R785
2K2
R749
4K7
10K
R750
R751
X702
100
SDA31SCL32PLL-CLK34PLL-CE35EQ236FUNT IN/OUT37VOL-DN39VOL-UP40MUTE41DECODER RESET42DOUT43SBSY44SBOK
33
R752
R753
R748
R747
C738
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
10K
L=FUNC IN
AD00
AD01
C1
C2
C3
C4
S1
S2
S3
S4
S5
S6
S7
S8
S9
+
C787
47u
R705
10K
C737
100n
C736
100n
100n
C740
3V3
AD02
AD03
AD04
AD05
AD18
AD19
R793
4K7
R794
10K
SANYO DA11V
22K
L710
47uH
100u
C702
+
R812
47K
R704
10K
R703
4K7
TUNER BAND
AREA=GEN2PUH SELECT
R792
10K
+
C713
220u
C701
+
220u
L709
47uH
R754 1K
R755 1K
R756 1K
R758
R7594K7
R7574K7
4K7
ǵ
RCD 1420 MP3
CN604
RECTIFIER BOARD
CN102
CN602
MUTE
1
SW101D
SW101B
13
5
RA
14
6
OFF
15
7
16
8
CD
4P3TD
4P3TD
CD+
7V
3V9
MUTE
RA+
RA-L
GND
RA-R
SW101A
SW101C
1
2
3
4
4P3TD
4P3TD
9
RA
10
11
OFF
12
CD
RA
OFF
CD
CD+
1
CD-R
2
GND
3
CD-L
4
1
7V
2
2
CONT
3
3
V+
4
4
GND
5
5
5V6
6
6
3V
7
7
9014C
Q106
1N4148
D104
D105
1N4148
R127
82OK
1N4148
+
C131
1u
D106
TP103
R128
3K3
D108
R403
10K
R404
R148
50K
R145
1N4148
Q111
+
9014C
Q113
C136
9015C
47u
R142
D109
1K
1N4148
R143
220K
C137
20n
Q112
9014C
TP102
R139
2K2
C109
R111
u47
+
4K7
CN106
R-CH
1
1
GND
2
2
L-CH
3
3
R112
4K7
+
C135
22u
+
C110
u47
R140
1K
R144
680K 1%
6M8
R149
33K 1%
R146
39K 1%
VR401A
2
50KB
1 3
CN503
R-OUT
GND
L-OUT
46
VR401B
5
50KB
R141
R147
120
R138
15K
C111
Q104
9014C
Q103
9014C
C112
+
u47
C113
1n
R113
C117
100K
+
100u
R114
100K
C114
1n
+
u47
1K
10K
TP101
R122
R107
+
C106
1K
R-CH
L-CH
C116
+
4u7
VR-R
GND
VR-L
3
2
1
4
5
6
2P2TD
SW401B
SW401A
2P2TD
C401 600p(M )
R401
39K
ON
OFF
OFF
ON
R402
39K
C402 600p(M)
C403
600p(M )
C405
120n(M )
R405
3K9
R406
3K9
C406
120n(M )
C404
600p(M )
CN104
CN501
1
1
GND
2
2
3
3
CN105
CN502
1
1
2
2
3
3
4
4
4K7
C105
u47
+
u47
R108
4K7
C103
22n(M)
R103
R109
18K
47K
C107
u47
+
R105
220K
C101
+
CN103
CN603
R
3
G
2
L
1
u47
3
2
C102
1
+
u47
R104
18K
Q101
9014C
Q102
9014C
R106
220K
+
C108
u47
R110
47K
C104
22n(M)
1N4148
D103
R133
R132
390K
6M8
9014C
Q108
R134
22K
R135
18K
+
R150
T100K
R151
12K
C128
2200u 16V
C127
20n
C126
+
100u 16V
R121
R129
330
R130
9014C
6K8
R131
18K
Q107
1u
C132
Q105
9012H
2K2
1
12
IC101
TA8227P
(DV3287B)
3
2
4
11
10
PRE GND
6
R115
5
150
9
+
C130
100u
7
R116
8
150
+
C118
100u
C119
100u
C120
C133
100u
Q109
2SB772Q
+
C134
100u
R137
1K
R136
Q110
9014C
82K
20n
CN301
CN101
3V+
1
1
V+
2
2
GND
3
R117
R118
3
R119
R120
33K
33K
1
1
4T
R-CH
L-CH
GND
CN107
CN201
1
1
2
2
3
3
+
C129
100n
+
C125
100u
1N4148
1N4148
D101
D102
C121
+
+
1000u
C123
100n(M )
C124
100n(M )
C122
+
+
1000u
L34TL34TL3
R-CH
GND
L-CH
2200u 16V
C305
D304
C304
+
C301
D302
C303
C302
D303
D301
1N4001
20n 50V
20n 50V
T1
C
115
T H E R M A L
F U S E
1N4001
L1
L1
5T
1N4001
5T
20n 50V
1N4001
AC SOCKET
SW1 SOCKET SW
20n 50V
L2
4T
L2
4T
4T
L2
BATT2
1.5X2=3V
BATT1
1.5X6=9V
SP202
CN202A
L-CH
GND
GND
R-CH
CN202B
L-CH
4
4
GND
3
3
GND
2
2
R-CH
1
1
8 OHM
SP201
8 OHM
PHONE BOARD
R201
180
R202
180
R203
150
C202
C201
2n
JK201
R204
150
STEREO
JACK
2n
RADIO BOARD
FUNCTION SWITCH
ǵ
VOLUME BOARD
POWER BOARD
NOTE : RESISTOR IN OHM
CAPACITOR IN F
INDUCTOR IN H
UNLESS OTHER SPECIFY
14-Oct-2004
RCD 1420 MP3
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