Technics SA-EH790 Schematic
FM ANT
AM ANT
Q607
X1
X0
Y0
G
SW CONT.
VDD
VSS
ABC
11 10 9
12
1
Y1
15
+B4
-B3
13
14
2
8
16
7
A.GND
Lch IN
Rch IN
+B(10V)
SUR L
SUR R
S.W
MIC
-B(-10V)
V.GND
D.GND
CS/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
FL1
FL2
Rch
Rch
From POWER
TRANSFORMER
Rch
BU4053BCFE2
IC201
SIGNAL SELECTOR
8
(6)
Lch
(Rch)
Z120 TUNER PACK
(RAN0005EM-2)
DET
DO
CL
+7V
GND
+15V
1
2
+B1
SD
3791110
4
+B2
CE
DI
5
ToSOUNDPROCESSOR
BLOCK DIAGRAM
TUNER L/C
TUNER Rch
MUTING
MUTING
+B4
(Q608)
Q605
Q902
MUTING
CONT.
345
SD
LC72 CE
SHSYNC
SH CK
21
94
SH CS
SH REQ
2100
LC72 CK
LC72 DO
LC72 DI/ST
C2BBFD000404
SYSTEM CONTROL / FL DRIVE
IC901
97
9596
SH DI
SH DO
6
6CH
ST/AV.
SEL/
TUNER
10
MIC DET
25
+B8
SA-EH790(E,EB,EG,EP) BLOCK DIAGRAM
93
MUTE3
4,10
2
7
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
CINFLOUTVREFVDDA/D
VREF
OSC/DIVIDER
XOUTXIN
89
X151
(4.332MHz)
Q606
MUTING
PLL
(57kHz)
MODE
12 13
CLOCK
RECOVERY
(1187.5kHz)
DATA
DECODER
RDS-ID
DETECT/
RAM
RST
RDCL
RDDA
IDR
Q609
(Q610)
15
14
16
MUTING
+B5
Q612
MUTING
CONT.
26
(25)
23
22
24
19
(18)
13
RSN311W64B
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
M
FAN MOTOR
Rch
D974
Q503,D558
SWITCH-
ING
D907
D906
AC IN
PHONES
SURROUND
(8 )
CENTER
(8 )
SPEAKERS
HF
(6 )
LF
(8 )
VR901
(VOLUME)
24 23
VR JOGA
30~37
FL901
VR JOGB
1~8G
FL DISPLAY
FL1,2
38~45,
47~50
52~71,
73~78
16
X901
(6MHz)
XC IN
P1~38
17
D933,
D934
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
88
DD3VDD4
V
46 72
+B8
POWER
POWER
1
86
CHECK
-VP
26
51
MUTE
Vss
15
89
SA-EH790(E,EB,EG,EP) BLOCK DIAGRAM
-VP
HP SW
Vss2
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
C2BBFD000404
SYSTEM CONTROL / FL DRIVE
STAND-BY
81
IC901
KEY
SWITCH
(S901~915)
KEY TU
19 20
-B1
-B3
-B2
+B7
D702,704,
752,754,755
D701,703,
751,753,761
Q702,705
REGULATOR
/STABILIZER
T701
AC IN
SHSYNC
POWER
SASYNC
+B3
+B4
+B2
+B1
+B5
-VP
+B6
+B8
+B9
D902
D901
Q723
REGULATOR
Q711,725
REGULATOR
/STABILIZER
Q726
REGULATOR
D711
Q703,704
REGULATOR
Q701
REGULATOR
REGULATOR
Q708,709
SWITCH-
ING
Q707
D740
D746
D717~720
FL DISPLAY
(FL901)
D741~744
FL1
FL2
FP791
FP792
D705
POWER TRANSFORMER
T702
POWER
TRANSFORMER
+B6
RL702
Q791
RELAY
DRIVE
Z701
NOTES : SIGNAL LINE
F1
L701
AC IN
:AUDIOSIGNAL
:TUNERSIGNAL
( ) indicates pin No. Right channel.
SA-EH790(E,EB,EG,EP) BLOCK DIAGRAM
Note: This printed circuit board diagram may be modified at any time with the development of new technology.
MAIN P.C.B.
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
R908
S907
(SET)
C
S906
(TUNING
MODE)
(—DEMO)
S903
B
JK903
(PHONES)
2
3
6
4
1
5
7
C923
W905
R906
(FM AUTO/
MONO)
R905
J
C396
J
S905
(CLOCK/
TIMER)
C395
J
S902
S909
(6CH DISCRETE
INPUT)
R904
R903
)
D904
J
C924
R902
J
R999
R976
Q901
B
C
E
J
J
J
J
D905
C914
C916
C918
R928
D974
R946
R901
1
2
3
R929
J
J
C901
VR901
(VOLUME)
R930
R931
R932
R956
R987
R926
R936
R935
J
R954
C905
95
100
1
5
C925
R953
C912
C911
J
R952
C910
R921
J
R944
C158
C159
C157
C156
S904
( PLAY/
REC)
J
R988
L902
90
10
J
J
C917
J
R918
R919
R934
R937
C926
85
15
3
2
1
X902
3
2
1
X151
C915
R957
R991
D961
R969
J
J
D906
R959
R958
R960
J
J
J
L901
81
IC901
20
25
30
X901
R951
C908
R924
R925
R922
Z901
(SENSOR)
C154
IC151
910
R157
D954
( PLAY/
J
J
C902
J
Q902
E
C
B
R966
C903
R939
R986
J
80
J
R943
C907
R961
R962
C151
15
REC)
J
C921
75
R945
J
D151
R965
70
31
158
16
C155
R942
N
R974
R993
J
J
J
35
J
C919
C152
R941
R995
J
C928
D933
65
R950
J
L151
J
D973
R990
R997
60
40
C909
C904
R158
J
C931
D934
45
R949
C153
C160
J
J
R975
55
D907
W902B
15
R912
J
FL901
1
2
5
6
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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
53
54
S913
J
J
C920
J
L152
J
W901B
L153
R151
D951
D902
14
12
10
8
6
4
2
R152
R153
14
12
10
8
6
4
2
15
13
11
J
J
R154
13
11
9
7
5
3
1
9
7
5
3
1
J
R155
DIGITAL
S.WOOFER
J
J
J
D901
C922
R996
51
50
C927
A
S901
( / )
D306
( )
(REP3337H-M)
123456789101112
B
W902A
D607
CN781
10
9
R635
8
7
6
J
5
4
3
2
1
C725
J
To SOUND PROCESSOR
J
R719
J
J
14
12
10
J
C664
J
15
13
J
11
9
8
7
6
5
4
3
2
1
J
R694
D611
J
J
R696
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
D659
J
J
D718
D754
Q723
R764
J
W901A
15
14
13
12
11
10
8
6
4
2
J
J
J
J
J
J
J
C741
W722A
4
3
2
1
D704
J
B
C
E
R763
J
9
7
5
3
1
J
J
C707
Q707
C731
J
J
J
J
C761
J
C704
R776
R708
E
C
B
D720
C714
D717
D719
D755
C702
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
Q610
8
6
4
2
C509
C706
ECB
ECB
R739
D703
D751
J
D752
D702
J
Q609
ECB
ECB
J
R512
R510
J
J
J
D701
J
J
J
J
R511
R509
C510
D721
Q709
J
J
J
J
J
Q708
C715
J
J
1234
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
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
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
D725
R572
R544
R769
R721
R638
J
Q553
R558
D582
E
D555
Q556
R556
R555
D558
R767
J
C709
J
1234567891011
ECB
D581
CB
C550
ECB
R569
C551
D551
R607
C613
R608
C614
C721
B
C
E
C619
J
J
R722
J
J
J
CP601
C559
D554
J
R623
R637
J
J
J
7
R566
R567
R560
C371
R622
C618
Q557
ECB
E602
R552
R620
R546
R547
R624
C648
C617
J
R648
E601
C640
R568
JK551
12
R551
C616
N
R627
R642
J
C642
B
C
E
R621
D602
D601
J
C620
C641
Q602
C660
C659
R615
C612
R610
J
R619
J
D553
C556
Q601
B
C
E
J
C622
R628
C647
R631
R611
C609
R691
J
J
R640
J
C630
J
N
N
Q607
R632
J
R647
L602
C555
Q606
Q605
R688
J
C611
C605
C610
J
J
L601
R639
J
C639
J
R604
R687
R614
C603
R609
J
C637
E
R601
J
J
C606
R612
J
C632
C636
C635
R605
R606
R617
R618
E
E
R603
R686
R685
E
C650
J
R684
R683
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
C608
C631
SPEAKERS
LF
(8 )
Rch
HF
(6 )
LF
(8 )
Lch
HF
(6 )
(REP3337H-M)
SA-EH790(E,EB,EG,EP) OPERATION, MAIN P.C.B.
13
H
POWER TRANSFORMER
E
(A) P.C.B.
POWER TRANSFORMER
F
AC IN P.C.B.
D
G
F
E
D
230V 50Hz . . . [E,EG,EP]
C
230-240V 50Hz . . . [EB]
C791
4
1
F1 T2A
FC1 FC2
L701
JK701
AC IN
RL702
W1
Z701
3
2
W2/W3
T702(Power transformer)
C644
C651
C646
C652
JK603
C
SR
SL
CENTER/
SURROUND
SPEAKERS
C753
J
L604
C625
C643
J
C755
C633
C645
R794
Q791
ECB
D500
Q726
ECB
C754
C758
R777
J
D743
J
D741
D742
R646
C624
R644
L603
R643
R645
REP3338A-S . . . [E,EG,EP]
REP3338B-S . . . [EB]
R773
R774
J
D744
J
C634
D746
D747
J
C759
J
R795
D740
R793
D745
R771
D711
R772
R712
CN602
1
2
3
J
4
5
6
7
8
CN601
1
2
3
4
5
6
7
8
9
10
11
12
W721B
1
2
3
4
5
6
7
8
9
10
R798
W722B
1
2
3
4
FP791
FP792
J
CN701
CN702
CN703
CN704
CN705
CN706
CN707
CN708
CN709
CN710
(REP3337H-M)
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
W701B
C710
R765
R720
C734
J
D723
10
9
8
7
6
5
4
3
2
1
Q701
Q702
Q711
B
C
C719
E
B
C
E
C720
B
C
Q725
E
J
(B) P.C.B.
CN711
CN713
CN712
REP3338A-S . . . [E,EG,EP]
REP3338B-S . . . [EB]
J
W1
J
W2
J
J
W3
J
J
(REP3337H-M)
A
SA-EH790(E,EB,EG,EP) AC IN, POWER TRANSFORMER(A)&(B), POWER SUPPLY P.C.B.
123456789101112
13
Loading...