Technics SADV-280 Schematic
-
Z101 TUNER UNIT (RAN0005EM-2)
FM ANT
+B(FM)
RF AMP
FM
MIXER
FM OSC
+B(FM)
+B(FM)
24
1
AM
OSC
OUT
FM IF
IN
BUFFER
BUFEER
Vcc
9
+B2
IFT
AMP
3
REG
ALC
LEVEL
FM IF
DET
AM
OSC
FM IF
AMP
CURVE
FM
DET
FMDET
AFC
S-
AM ANT
Q607
MUTING
MUTING
+B4
(Q608)
Q605
Q902
MUTING
CONT.
17
GND
5
IN
PILOT
AM
OSC
COIL
+B2
16
MPX
PHASE
DET
VCO
+B2
FM / AM I F AMP,
DET /AM OSC,
MIX / FM MPX
(LA1833MN)
FM:ON
15
IN
OUT
PILOT
FF
STEREO
SWITCH
FM/AM
12
13
DECODER
FFFF
MONO
Lch
ST
7
14
Rch
PILOT
CANCEL
PILOT
DET
Rch
SD
DET
TUNER L/C
TUNER Rch
ToSOUNDPROCESSOR
(SH-DV280)
BLOCK DIAGRAM
A.GND
Lch IN
Rch IN
+B(10V)
SUR L
SUR R
S.W
MIC
-B(-10V)
V.GND
D.GND
CE/REQ
CLK
DATA
CT.GND
SH FL1
SH FL2
SYNC
W501
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
+B5
-B3
From POWER
Rch
Rch
Rch
TRANSFORMER
BU4053BCFE2
IC201
SIGNAL SELECTOR
+B4
-B3
13
14
2
8
16
7
X1
X0
Y0
G
SW CONT.
VDD
VSS
ABC
11 10 9
12
1
Y1
15
AM
ANT
COIL
+B(FM)
19202122 23
18
AM
IN
OSC
AM RF
AM
AM
RF
MIX
AMP
AM
IF
AM/FM
IF
BUFFER
TUNING
DRIVE
AM
MIX
OUT
2
AM
IFT
AGC
AGC
COMP
AM IF
IN
4
AM
AM
DET
SD
68 1110
OUT
DET
STRQ
OUT
PLL FREQUENCY
SYNTHESIZER
(LC72131M)
+B(FM)
Power
+B1
supply
(FM:ON)
18
AOUT
17
AIN
REFERENCE
DIVIDER
1/6,1/17 4BIT
12 BIT
PROGRAMMABLE
DIVIDER
DATA SHIFT
REGISTER LATCH
BO4
BO3
BO2
98710
1/2
XOUT
FM IN
AM IN
VDD
PHASE DET
CHARGE PUMP
SWALLOWCOUNTER
IO2
IO1
12
16
PD
IFIN
11
UNIVERSAL
COUNTER
Power
Vss
19
ON
RESET
15
XIN
CE
BO1
7.2MHz
1
20
14
13
2
3
DI
4
CL
5
D0
CE1
DATA1
CLK1
DATA IN
6
+B2
SHSYNC
97
9596
SH DI
LC72 CE
SH DO
LC72 DI/ST
SH CK
LC72 CK
345
CE1
CLK1
DATA IN
21
94
SH CS
SH REQ
6
6CH
ST/AV.
C2BBFD000317
SYSTEM CONTROL / FL DRIVE
SD
LC72 DO
2
100
DATA1
SD
IC901
93
MUTE3
SEL/
TUNER
10
MIC DET
25
+B8
SA-DV280(EB,EG) BLOCK DIAGRAM
DET
4,10
2
7
VDDA/D
VssA/D
MPX IN
TEST
+B2
3,11
REFERENCE
VOLTAGE
ANTIALIASING
FILTER
TEST
C1BB00000527
RDS SIGNAL DEMODULATOR
1
57kHz
BPF
(SCF)
56
SMOOTHING
FILTER
CLK(4.332MHz)
IC151
CINFLOUTVREF
VREF
OSC/DIVIDER
XOUTXIN
89
X151
(4.33MHz)
Q606
MUTING
PLL
(57kHz)
MODE
12 13
CLOCK
RECOVERY
(1187.5kHz)
DATA
DECODER
RDS-ID
DETECT/
RAM
RST
CLK
DATA
IDR
Q609
(Q610)
15
14
16
MUTING
+B5
Q612
MUTING
CONT.
26
(25)
RSN311W64B
19
(18)
23
22
24
13
IC601
POWER AMP
POWER CONTROL
CIRCUIT
POWER CONTROL/
PROTECTION CIRCUIT
GND
1621
1047
-B2
D602
-B1
20
3
6
15
1
(2)
5
11
(12)
8
9
14
D601
N
+B7
+B3
Q601,602
PRO-
TECTOR
Q551,554,
555
Q553,556,
557
-B3 +B4
SIGNAL
LEVEL DET.
MOTOR
DRIVE
Rch
D906
Q503,D558
SWITCH-
ING
D974
D907
PHONES
SURROUND
Ω
(8 )
CENTER
Ω
(8 )
SPEAKERS
HF
Ω
(6 )
LF
Ω
(8 )
M
FAN MOTOR
AC IN
POWER
VR901
(VOLUME)
24 23
VR JOGA
30~37
FL901
VR JOGB
1~8G
FL DISPLAY
38~45,
47~50
52~71,
73~78
16
P1~38
X901
(6MHz)
17
XC IN
D931,933
XC OUT
79
(32.7kHz)
13 14
REGIN0
X902
XIN
80
X OUT
REGIN1
Z901
(REMOTE
SENSOR)
D954
( PLAY/REC)
29
82
REMO-
CON
TIMER
S.WOOFER)
+B8
D951
(DIGITAL
DD3VDD4
V
46 72
+B8
88
POWER
POWER
1
86
CHECK
MUTE
15
Vss
-VP
26
51
-VP
HP SW
Vss2
89
SA-DV280(EB,EG) BLOCK DIAGRAM
SASYNC
+B8
98
E DET
VDD1
VDD2
90
18
+B9
KEY
KARAOKE
11
AC IN
RESET
12
Q901,
RESET
D904
28
27
RDS CLK
RDS DATA
S.W LED
83
D306
()
91
MUTE2
C2BBFD000317
SYSTEM CONTROL / FL DRIVE
STAND-BY
81
IC901
KEY
SWITCH
(S901~908,
910~915)
KEY TU
19 20
AC IN
-B1
-B3
-B2
+B7
+B3
+B4
+B2
+B1
+B5
-VP
Q723
REGULATOR
Q711,712,725
REGULATOR
/STABILIZER
D702,704,
752,754,755
Q703,704
REGULATOR
Q701
REGULATOR
Q702,705
REGULATOR
/STABILIZER
Q707
REGULATOR
D701,703,
751,753,761
D717~720
D705
T701
POWER TRANSFORMER
+B6
RL702
RELAY
DRIVE
Q791
Z701
NOTES : SIGNAL LINE
F1
L701
AC IN
: FM SIGNAL
: AM SIGNAL
: FM OSC SIGNAL
: AM OSC SIGNAL
:AUDIO SIGNAL
( ) indicates pin No. Right channel.
SHSYNC
POWER
SASYNC
+B6
+B8
+B9
D902
D901
Q726
REGULATOR
Q708,709
SWITCH-
ING
D740
D746
FL DISPLAY
(FL901)
D741~744
FL1
FL2
T702
POWER
TRANSFORMER
SA-DV280(EB,EG) BLOCK DIAGRAM
Note: This printed circuit board diagram may be modified at any time with the development of new technology.
OPERATION P.C.B.
A
H
G
F
E
S915
(RDS
DISP MODE
PTY)
S914
(RDS
DISP MODE
PS)
S911
(TUNING )
S910
(TUNING )
J
R916
R913
R915
R914
J
S912
(TUNER/
R994
BAND)
R911
J
R940
R910
S908
R909
(INPUT
SELECTOR
D
R907
J
S907
(SET)
R906
J
S903
6
(FM AUTO/
MONO)
R905
J
C396
J
S905
(CLOCK/
TIMER)
C395
R904
R903
S902
C
S906
(TUNING
MODE)
(—DEMO)
B
JK903
(PHONES)
2
3
4
1
5
7
C923
W905
)
D904
J
C924
R902
J
R999
R976
Q901
B
C
E
J
J
J
R929
J
D905
C914
C916
C918
R928
D974
R946
R901
VR901
(VOLUME)
1
2
3
R930
R931
R932
R956
R987
R936
R935
J
R954
J
J
C901
100
C912
J
R952
C910
J
R944
C159
S904
( PLAY/
REC)
J
C905
1
C911
R921
C158
C157
C156
R926
L902
95
5
10
C925
R953
J
R918
R919
R934
R988
R937
R969
R958
C926
85
90
15
3
2
1
X902
J
R922
J
C917
(SENSOR)
3
2
1
X151
C915
R991
J
D906
81
20
X901
Z901
C154
R957
J
R959
R960
J
25
R925
910
D954
J
J
D961
R966
J
J
L901
IC901
30
J
R951
C908
R924
IC151
R157
REC)
( PLAY/
J
C902
Q902
E
C
B
J
C903
C921
R939
R986
J
80
75
R943
R945
C907
J
R961
R962
C151
15
R965
D151
158
16
R942
J
J
J
70
31
C155
N
R974
R993
65
35
J
R950
C919
C152
R941
R995
J
C928
D973
R990
R997
D933
60
40
C909
C904
J
L151
R158
J
J
C931
45
R949
C153
C160
J
J
R975
D931
55
D907
51
50
J
J
D901
C922
C927
R912
J
R996
FL901
W902B
15
14
J
13
12
11
S913
10
DIGITAL
9
8
S.WOOFER
7
6
5
4
3
2
D951
1
J
J
J
J
D902
W901B
C920
15
14
13
12
11
10
9
8
1
7
2
6
5
4
3
5
2
6
1
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
L153
34
35
36
37
38
J
39
40
41
42
J
43
44
45
46
47
48
49
50
53
54
L152
R151
R153
J
R155
R152
R154
To SOUND PROCESSOR
A
S901
( / )
D306
( )
(REP3337E-M)
MAIN P.C.B.
B
W902A
D607
J
CN781
14
10
12
9
10
R635
R719
8
8
7
6
6
J
5
4
4
2
3
2
J
1
J
J
C725
C664
J
Q723
14
12
10
8
6
4
2
J
J
J
C741
4
3
2
1
R764
R763
J
15
13
11
9
7
5
3
1
J
J
J
Q707
B
C
E
J
J
C731
J
J
C707
J
C761
J
J
R776
D717
D755
C702
C704
R708
E
C
B
D720
C714
D719
C740
C735
J
W501
19
17
15
13
11
J
J
J
J
R738
C708
20
18
16
14
12
10
9
7
5
3
1
J
8
6
4
2
C509
C706
ECB
ECB
R739
D703
J
D752
D702
J
Q609
ECB
ECB
Q610
J
R512
R510
J
J
D751
J
D701
J
J
J
J
R511
R509
C510
D721
J
J
J
Q708
Q709
C715
J
1234
J
J
J
R564
R693
R692
R597
R598
C602
J
J
D761
C703
J
C701
CP602
R563
J
J
J
R229
C656
J
J
C601
R204
C202
8
IC201
9
10
R202
Q704
J
Q703
D753
C629
C627
5678
J
J
R203
15
15
16
R205
D201
ECB
C723
J
C732
C626
C628
R651
CP101
J
J
C554
D583
Q554
C655
J
J
D552
J
R561
J
D757
Q555
R591
CB
E
C201
R559
R557
R211
C552
C724
D658
D756
Q551
R796
R797
R727
R729
ECB
J
Q503
J
R721
J
J
J
J
J
J
L606
R650
R649
R652
L605
J
J
J
1 2 3 4 5 6 8 910 1112
R570
B
C
E
R572
R544
R769
J
R558
E
Q556
D725
D558
J
R638
C709
Q553
D582
CB
D555
ECB
R569
C551
R556
C613
R608
C614
R555
B
C
E
R767
J
1234567891011
C559
ECB
D581
D554
C550
D551
R607
C721
C619
J
J
R722
J
J
J
J
J
CP601
7
R566
R560
C371
J
R623
C618
R637
J
Q557
R567
R622
R620
R546
R547
R624
C648
C617
J
C640
R568
ECB
JK551
12
E602
R552
R551
N
R648
E601
R642
J
C642
B
C
E
R621
C616
R627
J
C641
C660
C659
C612
R610
J
R619
J
D602
D601
C620
D553
C556
Q601
J
C622
Q602
R628
C647
R631
R615
R611
R691
J
R640
J
C630
B
C
E
C609
J
R647
J
C555
NN
NN
Q605
R688
Q607
R632
C611
J
J
L601
L602
C639
Q606
J
R604
R687
R614
J
R609
C605
C610
J
J
R639
J
C637
R601
C603
J
J
C606
R612
J
C632
C636
C635
E
E
C650
J
R605
R606
R617
R618
R684
R683
E
E
R603
R686
R685
CB
CB
R602
J
J
C621
CB
CB
C607
IC601
C604
C649
J
R641
JK602
JK601
Q608
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C631
C608
(REP3337E-M)
LF
(8 )
HF
(6 )Ω
LF
(8 )
HF
(6 )Ω
SPEAKERS
Ω
Rch
Ω
Lch
D737
J
Q612
B
C
E
J
R695
J
C733
J
J
J
D657
J
C705
J
J
C737
D705
W721A
10
9
8
7
6
5
4
3
2
1
J
J
R230
J
W901A
D659
J
J
J
J
D718
W722A
D704
D754
J
J
15
13
J
11
9
7
5
J
3
1
J
R761
R694
D611
J
R696
SA-DV280(EB,EG) OPERATION, MAIN P.C.B.
123456789101112
13
Note: This printed circuit board diagram may be modified at any time with the development of new technology.
H
POWER TRANSFORMER
E
(A) P.C.B.
POWER TRANSFORMER
F
AC IN P.C.B.
D
RL702
4
3
G
2
1
C791
F
E
F1 T2A
FC1 FC2
L701
JK701
W1
W2/W3
Z701
D
T702(Power transformer)
C644
C651
C646
C652
JK603
C
SR
SL
C753
J
L604
C625
C643
J
C755
C633
C645
D743
R643
Q791
C754
C758
J
R646
R644
R645
R794
ECB
D500
R777
J
D741
D742
C624
L603
R773
R774
Q726
ECB
J
D744
J
C634
R795
D740
J
D745
R771
D711
R772
R712
C759
D746
CN602
1
2
3
J
4
5
J
6
7
D747
8
CN601
1
2
3
4
5
6
7
8
9
10
11
12
REP3338A-S . . . [EG]
REP3338B-S . . . [EB]
W721B
10
R793
1
2
3
4
5
6
7
8
9
R798
W722B
1
2
3
4
FP791
FP792
J
(REP3337E-M)
CN701
CN702
CN703
CN704
CN705
CN706
CN707
CN708
CN709
CN710
AC IN
230V 50Hz . . . [EG]
230-240V 50Hz . . . [EB]
CENTER/
SURROUND
SPEAKERS
C
B
T701(Power transformer)
POWER SUPPLY P.C.B.
C
R725
R723
Q705
ECB
R724
D739
D738
B
C
E
D730
D758
C718
C722
R749
C717
R768
R765
W701B
C710
R720
C734
R753
R754
D723
10
9
8
7
6
5
4
3
2
1
Q701
Q702
Q711
Q712
B
C
C719
E
B
C
E
C720
B
C
Q725
E
J
B
C
E
(B) P.C.B.
CN711
CN713
W2
J
W3
CN712
J
REP3338A-S . . . [EG]
REP3338B-S . . . [EB]
J
W1
J
J
J
(REP3337E-M)
A
SA-DV280(EB,EG) AC IN, POWER TRANSFOMER(A)/(B), POWER SUPPLY P.C.B.
123456789101112
13
SCHEMATIC DIAGRAM-1
OPERATION CIRCUIT
A
H
G
F
E
D
C
B
150
R997
R996
150
D973
MA4030MTA
C921
1000P
JK903
PHONES
3.5mm STEREO
FL901 (A2BB00000084)
C922
35V33
W905
1 6 8 10 11 1213 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 53 542 5 7 9
C920
25V22
C928
25V22
S913
(DIGITAL
)
S.WOOFER
2
3
6
4
5
7
1
C923
NOTE:
The number which noted at the connectors onthe schematic diagram as "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2"
indicates the schematic diagram serial number located onthe left corner in the schematicdiagram.
FL DISPLAY
ABCDEFGHIJKLMNOPQRSTUVWXYZ
R912
4.7K
0.1
S908
S912
)
INPUT SELECTOR
(
(TUNER/ BAND)
C396
0.047
R907
3.3K
R911
3.3K
S907
S911
)
SET
(
)
TUNING,
(
C395
0.047
R906
2.2K
R910
2.2K
S906
S910
)
TUNING MODE
(
)
(TUNING,
R905
1.8K
R909
1.8K
S905
)
FM AUTO/MONO
(
R904
1.5K
S904
R916
1.5K
)
PLAY/ REC
(
ABCDEFGHI JKLMNOPQRSTU
R922
R921
10K
10K
R925
1K
R924
1K
C908
C907
C904
470P
470P
0.01
R944
C924
2.2K
0.1
R903
R9021KR901
1.2K
)
S903
DEMO
(-
R915
R9141KR913
1.2K
S
T
820
)
S902
CLOCK/ TIMER
(
820
)
PTY
S915
(
(RDS DISP MODE)
D974
MA165TA
S901
S914
)
/
(
)
PS
(
X
W
V
C919
C927
25V22
25V22
:AUDIO SIGNAL LINE: POSITIVE VOLTAGE LINE : NEGATIVEVOLTAGELINE
A
B
-
30.1V
-
30.1V
51
-
R990
100K
D306
29.3V
-
29.3V
-
29.3V
-
26.3V
-
20.5V
-
29.3V
-
29.3V
-
29.3V
-
23.5V
-
20.5V
-
23.4V
-
23.4V
-
23.7V
-
20.7V
-
29.6V
-
29.6V
-
29.6V
-
23.7V
-
26.6V
-
26.5V
5.1V
-
29.5V
-
29.5V
-
26.5V
-
17.2V
-
5.3V
-
10.3V
0.4V
0V
1.5K
R939
( )
SELS5223C
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
D954
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
D931
MA165TA
D933 MA165TA
100K
R993
C916
6.3V100
C
ABCDEFGH I J K LMNOPQRST UVWX
23.4V-20.5V-26.3V-26.3V
-
P12
-
VP
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
V
DD4
P33
P34
P35
P36
P37
P38
REGIN0
REGIN1
STAND-BY
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
1.5K
R986
)
D951
PLAY/ REC
SELS5923C
LNJ301MPUJAD
(
5.1V
P11
P10
FM / AM
T 5.5ms.
F=32.7kHz
TIMER
S.W.LED
0V0V0V
220
R995
)
R994 100K
S.WOOFER
(DIGITAL
R999
23.4V-20.5V-26.2V
-
5.1V
P8P7P6P5P4P3P2
P9
DD3
V
IC901
C2BBFD000317
SYSTEM CONTROL/
FL DRIVE
FM / AM
2V
P-P
2V/2ms.DIV.
T
10ms.
LOUNGE
CHORUS
MUTENCPOWER
0V0V0V
4.8V
100K
R960 1.5K
R959 47
R958 1K
26.2V-26.2V-26.1V-26.3V-23.5V-23.5V
29.2V
-
-
FM / AM
4V
0V
-
30V
F=6MHz
FM / AM
F=32.7kHz
5V
0V
5V
0V
DD2
MUTE2NCMUTE3
Vss2
V
5.1V
5.1V
C905
1000P
2.7K
R969
23.5V
-
P1
1G2G3G4G5G6G7G
FM / AM
T 5.5ms.
FM / AM
F=6MHz
3.3V
P-P
5.2V
P-P
FM / AM
5.2V
P-P
F=32.7kHz
2V/2ms.DIV.
SHCS
SHDO
SHDI
0V
1.9V
1.4V
1.9V
R935 100
100
R936
27.5V-25.5V
-
4V
0V
-
30V
4.2V
P-P
KEY KARAOKE
SEL/ TUNER
5V
0V
SHCK
E DET
CR TIMER
5.1V
3.3V
R988 1K
R937 10K
R934 100
25.6V-27.5V
3132333435363738394041424344454647484950
REMOCON
RDS DATA
RDS CLK
HP SW
MIC DET
VR JOGA
VR JOGB
NC(GND)
SH REQ
KEY TU
V
XC OUT
XC IN
X OUT
XIN
RESET
AC IN
SEL TUNER
ST/ AV.6CH
LC72 CK
LC72 DI/ ST
LC72 CE
LC72 DO
CHECK
SD
100
0V
C901
R987 1K
8G
DD1
Vss
6.3V100
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
R926
2.2K
R919
15K
R991
47K
-
25.6V
5.1V
2.6V
2.6V
0.6V
5.1V
0V
0V
1.4V
5.1V
5.1V
5.1V
2.3V
2.3V
2.7V
1.6V
5V
2.2V
0V
5.1V
5.1V
4.6V
0V
0V
2.5V
R976
100K
R918 10K
C903
R953 100
D905 1SS291TA
R928 47K
L902 1 H
0.01
R954
100K
4.7K
R949
100
R950
0.1
C912
18P
C911
C926
1000P
D902
1SS291TA
5V
A
B
C
D
E
R952
10M
X902
(32.7kHz)
5.1V
Q901
UN4212TA
RESET
C925
R9561KR957
C915
R940
R929 1K
R930 1K
R932 1K
R931 1K
X901
(6MHz)
1
3
330K
R951
20P
C910
0V
1000P
0.01
1K
D901
1SS291TA
C914
D904
1K
2
50V2.2
MA165TA
L901
10 H
C902
10V1000
U
J
H
G
A
B
D
C
EFIKLMNO Q
A
SA-DV280(EB,EG) OPERATIONCIRCUIT DIAGRAM
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