SA SA AK220 Service Manual
SCHEMATIC DIAGRAM -13
DECK CIRCUIT
: +B SIGNAL LINE
: RECORD SIGNAL LINE
: PLAYBACK SIGNAL LINE
C1038
220P
R1055
2.2K
R1038
4.7K
R1039
15K
PLAYBACK
HEAD
RECORD/PLAY
HEAD
ERASE
HEAD
C1057
1
1
L
2
3
4
5
R
CS1001
1
2
L
3
4
R
5
CS1002
2
3
4
5
1
2
3
4
5
11
12
R
L
10
R1001
C1002
B1ABCF000131
(BEAT PROOF)
C1015
1000P
5
1
2.2
Q1001
C1001
0.01
R1003
10K
Q1001
SWITCHING
C1007
4700P
C1003
1500P
C1012
1000P
C1020
470P
4
C1006
50V1
Q1003
D1003
B0ACCK000005
Q1003
B1AAGC000007
SWITCHING
(RECH)
AN7348S-E1
P.B EQ/REC AMP/
ALC/TPS AMP
R1009
18K
3
L1002
7L1A62N
3
6
5
2
1
4
R1010
18K
R1006
IC1001
R1017
8.2K
R1004
1.5K
1K
C1019
1000P
C1058
1000P
C1021
C1022
1000P
1000P
TAPE A
IC1001
TAPE B
1 2 3 4
C1023
1000P
470P
IC1004
SW
VCC
1 2 3 4 5
R1026
1K
L1001
G0C470JA0030
B0BC3R700004
C1008
50V1
R1015
47
C1030
10V100
INPUT
INPUT
TAPE A
TAPE B
INPUT
INPUT
C1031
C1027 1000P
GND
D1004
C1034
50V3.3
C1032
0.018
3.9K
R1018
0.033
C1036
21222324
NF
EQ
CUT
PB AMP
PB AMP
PB AMP
OUTPUT
ALC LOW
AB SW T
PB AMP
EQ
PB AMP
OUTPUT
5206197188179161015111412
3.9K
R1019
220P
C1039
C1035
50V3.3
10K
C1037
50V3.3
R1028
8.2K
IC1004
C1AA00000612
R/P SELECT
CTRL1
R1005
4.7K
10V100
47
R1016
PB AMP
NF
C1033
0.018
CTRL2
R1022
Q1004
C1011
0.047
R1007
4.7
C1010
25V100
R1029
C1040
16V10
REC IN
REC IN
C1009
16V47
4.7M
REC OUT
REC OUT
Q1005
ALC T
REC/PB SW
16V10
C1041
C1042
16V22
C1014
1000P
C1016
2200P
C1044 10V33
C1043
50V4.7
R1090
220
C1056 16V10
13
VCC
HI/LO
CRO/NOR
AB SW
RIPPLE
FILTER
OUTPUT
GND
100
R1030
10V22
C1045
R1035
10K
R1031
27K
Q1004~Q1005
B1AAGC000007
BIAS OSCILLATOR
C1013
1000P
C1017
2200P
R1011
B1ABCF000131
BIAS OSC CONTROL
C1059
0.01
C1046
16V220
C1018
0.01
Q1007
10K
R1012
4.7K
R1013
4.7K
Q1007
R1014
4.7K
R1040
C1026
6.3V47
0
R1032
10K
SCHEMATIC DIAGRAM - 14
DECK CIRCUIT
C1054
R1095
100K
R1098
10K
Q1020
R1096
Q1020~Q1021
B1ABEB000001
MUTING SWITCH
100K
R1084
2.2K
R1086
2.2K
Q1012~Q1013
B1ABEB000001
MUTING
R1048
1K
Q1021
R1091
2.2K
R1094
1K
R1093
1K
50V3.3
Q1013
R1047
1K
: +B SIGNAL LINE
: RECORD SIGNAL LINE
R1092
2.2K
Q1012
R1046
100K
B1ABCF000011
C1048
50V1
C1049
1000P
R1045
100K
C1047
50V1
Q1014~Q1015
BUFFER AMP
: PLAYBACK SIGNAL LINE
R1049
1M
Q1014
R1051
220
C1060
0.01
R1050
1M
Q1015
C1050
R1052
1000P
220
C1051
R1053
680
R1054
680
C1052
50V1
50V1
14
PBL
R1087
47K
13
PBR
C1053
16V220
TO
MAIN CIRCUIT (CN304) ON
SCHEMATIC DIAGRAM-4
10
1112
+B
MO+B
RECINL
47K
R1085
RECINR
R1097
10K
REC_H
R1058
AFGND
C1064
50V3.3
R1057
2.2K
R1056
220
689 7
2.7K
R1061
5
DMT
MO GND
0
4
2
1
3
BP1
MOTOR
DECK1_H
B1AARC000002
R1060
390
Q1017
B1GDCFJJ0023
DECK MUTING SWITCH
C1055
50V0.1
CN1001
Q1017
MOTOR SWITCH
Q1016
R1059
10K
121
W1002
-
+
M
2
DECK MECHANISM CIRCUIT
IC971
CNB13030R2AU
PHOTO INTERRUPTER
S972 HALF
VREF
_GND
HALF
S975 RECINH_F
S971 MODE
_F
_R
MODE
RECINH
RECINH
AD_OUT
IC951
CNB13030R2AU
PHOTO INTERRUPTER
1234567
STBY
_5V
R952
820
R953
39K
RGSD12A1445T
Z971
R972
820
R973
39K
D951
MA2C16500E
PL971
S952 HALF
S951
MODE
D971
MA2C16500E
PL970
MODE
D1_CRO2
GND
PHOTO_T
HALF
STBY_5V
VREF_GND
PHOTO_S
MODE
D1_CRO2
GND
PHOTO_T
HALF
STBY_5V
VREF_GND
PL
PL2
1
PL1
2
STBY_5V
3
PL_GND
4
5
6
7
8
9
10
CN971
TO
PANEL
CIRCUIT
(CP600) ON
SCHEMATIC
DIAGRAM-9
AD_OUT
PHOTO_PB
PHOTO_RP
HALF_PB
PL
VREF_GND
MODE_PB
SCHEMATIC DIAGRAM - 12
TO
MAIN
CIRCUIT
(CN300) ON
SCHEMATIC
DIAGRAM-8
TO
MAIN
CIRCUIT
(CN301) ON
SCHEMATIC
DIAGRAM-8
CN500
CN501
POWER CIRCUIT
RSN35H2A-P
FAN
1
DC_DET
2
MUTE_H
3
+15V
4
LCH
5
RCH
6
A_GND
7
8
LO_L
LO_R
9
10
11
T GND
12
P GND
1
D GND
2
uP GND
3
4
CD8V
5
6
7
LED 9V
8
MOT10V
9
+9V
10
-9V
11
SW5V
12
: +B SIGNAL LINE
IC501
HIC
R545
R448
R246
B0AACK000004
B1GCCFGA0005
CURRENT LIMITING SWITCH
(SHORT CIRCUIT PROTECTION)
B1AAKD000009
5V VOLTAGE REGULATOR
Q508
D508
B0BA5R600016
-IN_R
+IN_R
C501
0.01
C240
470P
C442
470P
C440
820P
C242
820P
56K
R546
56K
R245
R447
5.6K
5.6K
15K
15K
B0BA01500003
D513
Q514
B1AAGC000007
HEADPHONE
MUTING SWITCH
KTC3199GRTA
10V VOLTAGE REGULATOR
Q506
Q508
C514
0.01
R531
R532
2.2K
150
: -B SIGNAL LINE : MAIN SIGNAL LINE
IC501
IN GND
+IN_L
-IN_L
GND
-VCCM
MUTE C
AC DET
LATCH
OUT_L
100V10
R450
C521
330K
C443
100V10
C441
15P
R449
68K
D507
1T3T
R522
3.3K
R523
470
R501
10K
R502
R503
C508
16V10
12K
R445
5.6K
C446
50V1
22K
R521 2.7
D505
1T3T
D503
B0BA01400041
R247
5.6K
C248
50V1
D502
Q507
CURRENT STABILISER
15V VOLTAGE REGULATOR
2.2
C513
25V10
Q503
25V100
D508
R524
Q514
Q504
KTA1046
SWITCH
Q503
KTC2026
C509
0.01
C510
-VCC
R511
560
C507
16V10
VCC
OUT_R
1234567891011121314
C450
R504
47K
R510
2.7K
Q502
C506
0.01
R520
2.7
D504
B0AACK000004
D504
R529
330
15P
R250
68K
R451
150K
1000P
C503
R454
10
L402
L202
R254
10
R251
150K
C502
6.3V220
Q512
CURRENT CONTROL SWITCH
R505
47K
10V VOLTAGE REGULATOR
R509
330
D501
B0BA9R600002
R512
2.7K
Q505
3.3K
R513
R516
15
R518 2.7
R519
2.7
Q504
Q507
25V33
L202, L402
G0AR76Y00001
C444
0.1
C244
0.1
C447
0.1
C246
0.1
R455
R506
100K
10
R255
10
Q513
Q512~Q513
B1AAGC000007
DC DETECT SWITCH
Q505
KTA1267GRTA
Q502
KTA1046
VOLTAGE SUPPLY SWITCH
Q501
KTC2026
R507
R508
330
330
Q501
C504
D501
0.01
R514
3.3K
C505
16V100
R515
27
R517 2.7
R525
R526
2.2
2.2
C511
R528
0.01
10K
C512
D509
B0BA9R600002
C448
0.01
C449 0.047
C247 0.047
SPKR_L_GND
C520
63V2200
C_GND
400
FP533
C530
0.18
R527
2.2
Q506
R530
1.2K
C249
4700P
GND_L
GND_R
OUT_L
OUT_R
SPKR_R_GND
VCC+
VCC-
AC GND
ACIN
SUB B
SUB+B
GND
C540
63V2200
E501
1
-
2
-
FULL
RANGE
3
+
SPEAKER
4
+
JK952
1
2
3
TO
4
TRANSFORMER
CIRCUIT
5
(CN950) ON
6
SCHEMATIC
DIAGRAM-11
7
8
9
H950/
W950
E500
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