Panasonic SA-AK270EB / SA-AK270EG Service Manual ▷ View online
15
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22
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24
25
26
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28
I
J
L
M
N
P
O
K
MAIN CIRCUIT
SCHEMATIC DIAGRAM - 5
SA-AK270EB/EG MAIN CIRCUIT
1/4
2/4
3/4
4/4
: - B SIGNAL LINE
: + B SIGNAL LINE
+9VASP
MIC_GND
CHG_CCW
CHG_CW
FL_CS
FL_CLK
FL_DA
RMT
DVREF+
KEY3
VOL_LED
CD_3.3V
CD+8V
V_JOG_A
DBASS_JOG
-VP
FL1
FL2
DC_DET2
CD5V
A_GND
DC-DC_GND
MOTOR_12V
DC-DC_GND
DGND
A_GND
-9V
MOTOR_GND
MOTOR_GND
MOTOR_GND
AM_BP
PCONT
CHG_PL
ST_SW
OPEN_SW
CLOSE_SW
CLOSE_SW
HOME_SW
PLAY_SW
DGND
CD5V
BOTTOM_SW
UD_SENSOR
BOTTOM_SW
HP_SW
HP_R
PA_IN_R
EJECT
CNVSS
RESET
DGND
PA_SW
PA_IN_L
HP_L
USB_RST-UART_CLK
IPOD_RXD
IPOD_TXD
DPORT_PLYPAU_BUSY
DGND
VREF+
SYNC
CD+8V
USB+5V
MOTOR_12V
MOTOR_12V
DVREF+
3
1
2
3
1
2
4
5
6
8
9
7
2
1
4
5
3
10
11
4
2
1
3
5
5
3
4
8
7
6
2
1
9
2
1
3
1
6
7
5
9
12
13
10
11
18
25
26
23
24
27
1
27
20
19
22
21
16
14
15
17
8
2
4
3
9
10
5
6
1
3
4
2
8
7
5
6
1
3
4
2
8
7
8
9
11
12
10
2
5
6
3
4
1
7
14
13
R2765
2.7k
47K
47K
47K
47K
47K
B0JAME000114
B0JCPD000025
R2774
15K
R2914
47k
C2738
0.1
C2713
47
R2773
15K
R2775
9.1k
C2712
47
C2711
0.01
Q2771
R2771
7.5k
Q2772,Q2771
B1GBCFJJ0051
SWITCH
C2714
0.01
D2909
MAZ82400HL
R2772
8.2k
D2906
C2912
100
D2903
B0EAMM000057
C2903
35V33
R2733
390
D2732
B0EAKM000117
D2733
MAZ80820HL
D2774
B0ADCJ000020
D2775
B0ACCK000005
R2735
100
C2735
33
C2736
0.01
R2721
2.2
R2971
4.7K
R2970
10K
IC2741
C0DBZGC00067
REGULATOR IC
C2742
0.1
R2900
5.6k
C2702 25V1000
C2701 0.01
CN2701*
C2754
16V220
C2767
16V220
Q2763
B1ADCE000012
SWITCH
C2763
0.01
R2703
1K
R2702
3.3k
Q2751
B1BACG000023
SWITCH
C2756
33
C2705 100p
R2756
470
C2755
0.01
R2755
2.7K
R2701
1.5
R2705
10k
C2764
16V100
R2706
4.7K
C2704
0.01
IC2701
C0DAAYY00042
DC-DC CONVERTER
DZ2702
C2703 6.3V820
R2754
100
D2753
MAZ810000L
C2753 0.01
R2753
1K
C2751
0.01
C2766
0.01
C2765
10
C2761
0.01
Q2761
B1BCCG000002
SWITCH
C2762
0.01
R2762
1K
FP2901
0.4A
C2900
35V33
D2908
B0EAMM000057
D2708
D2708,D2707
B0EAKM000117
R2711
1K
D2707
R2713
2.7k
D2901
B0BC035A0007
C2707
6.3V100
R2902
47
T2900
G4D1A0000117
SWITCHING TRANSFORMER
T2900
C2901
3900P
Q2900
B1BABK000001
SWITCH
C2733
16V47
C2734
0.01
IC2731
C0CAAKG00046
VOLTAGE REGULATOR
C2732
0.1
R2937
10k
D2936
B0EAKM000117
Q2937
B1GBCFJJ0051
RESET (MICRO-P) SWITCH
Q2936
B1ACKD000006
CD SUPPLY
CONTROLSWITCH
R2936
1k
R2680
47K
R2670
R2672
CN2806
CN2807
R2673
47K
CN2811
R2667
47K
R2669
R2668
CN2805
BOTTOM_SW
D_GND
HOME_SW
5.0V
ST-SW
PLAY_SW
OPEN_SW
CAM_SENSOR
PLUNGER
UD_SENSOR
STBY
INV
GND
VCC
OUT
SYS6V
SYNC
SYS_GND
-13V
DC18V
+18V.-12V_GND
DC18V
AM_BP
PCONT
DCDET
+18V.-12V_GND
CTRL
FL_CS
FL_DOUT
+9V
+9V
RMT
MIC _-9V
KEY3
HP_R
PA_SW
HP_SW
HP_L
PA_IN_L
EJECT
PA_IN_R
PA_IN_GND
FL1
FL1
FL_CLK
FL2
FL2
CD3.3V
CD3.3V
VOL-LED
-VP
-VP
FL_GND
FL_GND
HP_GND
IN
KEY1
DBASS_LED
DBASS_LED
DGND
DGND
DGND
J_VOLA
VREF+
VREF+
VREF+
LED_AC
LED_GND
DBASS_JOG2
DBASS_JOG2
LED_SUPPLY
DBASS_JOG1
GND
KEY2
KEY1
KEY2
OUT
NC
BUSY
TXD
CLK
EFM
RXD
VCC
/RESET
CNVSS
FOR DEBUGGING
OUT
IN
GND
CW
VC_8V
SUPPLY_GND
CCW
Q2970
B1ADCE000012
SWITCH
Q2772
Q2735
B1BACD000018
SWITCH
CD+8V
USB+5V
A_GND
FL_GND
Q2763
SYS6V
SYS6V
Q2937
D2936
TO
PANEL CIRCUIT
(CN6001) IN
SCHEMATIC
DIAGRAM - 6
TO CRS1
(CN1)
TO
MUSIC PORT
CIRCUIT
(CN6807) ON
SCHEMATIC
DIAGRAM- 7
TO
SMPS CIRCUIT
(CN5802) IN
SCHEMATIC
DIAGRAM - 13
IC2701
C2737 16V47
DGND
DGND
L2702
G0A101ZA0028
G0A200D00002
L2704
G0A220GA0026
L2910
VREF+
-9V
Q2711
B1AAJC000019
SWITCH
Q2711
BK
15
BI
: MUSIC PORT SIGNAL LINE
: MAIN SIGNAL LINE
TO MAIN SECTION (3/4)
TO MAIN SECTION (2/4)
SA-AK270EB / SA-AK270EG
85
18.3. (C) Panel Circuit
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
D
E
F
H
G
C
SA-AK270EB/EG PANEL CIRCUIT
SCHEMATIC DIAGRAM-6
PANEL CIRCUIT
: +B SIGNAL LINE
: -B SIGNAL LINE
COM
B
A
1
3
2
DGND
VREF+
RMT
D.BASS
+9V
-9V
KEY2 KEY1
RMT KEY3
LED_AC
LED
SUPPLY
J_VOLA
DBASS_JOG1 DBASS_JOG2
LED
GND
FL1
-VP
FL2
FL_CS
POWER_LED
FL_GND
CD3.3V
DVREF+
DGND VREF+
FL_DOUT
FL_CLK
VOL_LED
TAPE REC
CD_2
CD_3
CD_5
CD_4
CD_1
POWER
OPEN/CLOSE
SGL_CHG
MULTI_CHG
DISPLAY
VREF+
STOP
LED_GND
J_VOLA
DGND
DVREF+
VOL_LED
KEY3
P1
P2
P2
P0
S16
VEE
G12/S17
NC
S14
S15
P3
DIN
OSC
G3
G2
G6
G5
[34] G9
[35] G8
G7
G11
G4
G10
VDD
G1
S1
[12] VSS
K1
K2
VDD
CLK
STB
S7
[21] S8
[22] S9
S4
S12
S13
S5 S6
S10
FL DRIVER
S11
S2 S3
B3AAA0000803
J0JBC0000019
B0BC2R4A0006
C6671
22
R6631
10K
VR6630
K9AA024A0008
BASS CONTROL
C6634
100P
R6632
10K
S6108
C6300
1000p
J6001
R6108
15k
C6633
100P
S6101
R6202
1.5K
R6102
1.5K
S6201
R6201
1.2K
C6940
S6200
R6458
1K
D6458
S6100
R6101
1.2K
R6200
10K
R6100
10K
S6202
R6203
2.2K
R6204
3.3K
S6203
R6103
2.2K
R6104
3.3k
L6671
R6671
22K
CN6001
FL6601
A2BB00000171
FL DISPLAY
R6672
10
D6672
C6614
0.01
R6620
R6619
R6622
C6612
330p
C6611
330p
C6613
R6205
4.7K
C6609
0.1
S6204
R6106
4.7k
S6205
S6206
R6107
6.8k
R6207
15K
R6206
6.8K
S6207
R6618
220
S6106
IC6601
C0HBB0000057
IC6601
C6938
0.1
R6300
10K
J6501A*
C6608
0.1
1
3
2
1
1
6
7
5
9
12
13
10
11
18
25
26
23
24
27
27
2019
2221
16 14
15
17
8
2
4 3
43
5
2
1
8
39
35
31
27 28
25 26
30
29
34
32 33
38
36 37
42
40 41
13
12
15 16
14
9
11
10
23 24
18 19
17
21 22
20
7
44
21
5
6
3
1
2
4
19
9
7
8
16 17
11
10
12
15
14
13
18
20
35
37
42
4443
3938
4140
36
33
22
31
29
27
24
23
26
25
28
30
32
34
5 6
1
3 4
2
8
7
DBASS_JOG2
DBASS_JOG1
DVREF+
KEY1_A
VREF+
LED_GND
RMT
CD3.3V
FL_DOUT
-9V
RMT
FL_CS
FL_CLK
+9V
DVREF+
VOL_LED
GR2
GR1
GR6
GR7
GR4
GR3
GR5
KEY2
KEY1
VREF+
SG2
SG1
KEY3
DBASS_JOG1
J_VOLA
DBASS_JOG2
KEY1
LED_GND
KEY2
DGND
FLGND
SG4
SG6
SG8
SG10
GR12
GR12
SG12
SG14
SG16
SG15
SG13
GR8
GR10
GR11
GR9
SG11
SG9
SG7
SG5
SG3
SG14
SG12
SG10
SG11
SG13
CD3.3V
SG1
SG4
SG3
SG8 SG9
SG6
SG5
SG7
SG2
FL_CS
FL_CLK
LED_GND
GR1
GR11
GR10
SG16
SG15
GR12
GR3
GR5
GR7
GR9
GR8
GR6
GR4
GR2
FL_DOUT
KEY1_A
FLGND
VREF+
KEY3
DVREF+
VOL_LED
J_VOLA
LED_GND
KEY2_STOP
KEY2_STOP
470
220
82K
330p
0.1
6
4
3
[44] VSS
TO
MAIN CIRCUIT (CN2806) ON
SCHEMATIC DIAGRAM- 5
TO
TACT SWITCH
CIRCUIT
(J6501B*) ON
SCHEMATIC
DIAGRAM - 7
DBASS_LED
TO
REMOTE SENSOR
CIRCUIT(J6001B*)
ON SCHEMATIC
DIAGRAM-7
SA-AK270EB / SA-AK270EG
86
18.4. (D) Tact Switch Circuit, (E) Music Port Circuit & (F) Remote Sensor Circuit
TO
MAIN CIRCUIT
(CN2807) ON
SCHEMATIC
DIAGRAM- 5
TO
PANEL CIRCUIT (J6501A*) ON
SCHEMATIC DIAGRAM - 6
TO
PANEL CIRCUIT
(J6001) ON
SCHEMATIC
DIAGRAM- 6
2 3
1
VREF+
DGND
RMT
B3RAD0000146
REMOTE SENSOR
C6616
22
Z6601
J6001B*
C6601
100p
1
3
2
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
D
E
F
H
G
C
6
8
9
7
2
1
4
5
3
10
L6802
J0JBC0000019
L6801
J0JBC0000019
L6863
J0JBC0000019
C6810
390P
C6861
1000P
C6801
0.047
C6802
0.047
R
5
4
3
2
1
6
7
5
4
3
2
1
6
7
L
R
L
L6812
J0JBC0000019
L6811
J0JBC0000019
L6851
J0JBC0000019
C6816
0.01
C6812
1
R6812
0
R6811
0
C6811
1
JK6810
JK6800
C6815
0.01
C6821
0.01
C6822
0.01
C6823
0.01
CN6807
MP_GND
S6820
EJECT
C6820
390P
C6803
0.1
C6804
0.1
C6851
0.1
C6852 1000P
C6863
0.1
C6813
330P
C6814
330P
HP_SW
HP_R
HP_L
HP_GND
DGND_C
MP_L
MP_SW
MP_R
MUSIC PORT
HEADPHONE
DGND
EJECT
PA_IN_R
PA_IN_GND
PA_IN_L
PA_SW
HP_SW
HP_R
HP_GND
HP_L
SCHEMATIC DIAGRAM - 7
TACT SWITCH CIRCUIT
MUSIC PORT CIRCUIT
SA-AK270EB/EG TACT SWITCH/MUSIC PORT/REMOTE SENSOR CIRCUIT
: MAIN SIGNAL LINE
: MUSIC PORT SIGNAL LINE
1 2 3 4
5 6 7 8
D6511
B3AAA0000884
R6512
220
C6512
1000P
R6511
180
Q6511
B1GBCFJN0033
SWITCH
DGND_B
R6208
47K
KEY2_STOP_B
J6501B*
S6304
TUNER
S6302
REW
S6303
TAPE
S6308
MUSIC PORT
S6306
CD
S6307
USB
R6501
12K
R6502
22K
R6503
10K
C6503
1000P
VR6500
EVEKE2F3524B
ENCODER
S6300
FWD
R6301
1.2K
R6302
1.5K
R6303
2.2K
R6304
3.3K
R6305
4.7K
R6306
6.8K
R6307
15K
R6308
47K
S6208
STOP/DEMO
S6301
MANUAL_EQ
LED_SUPPLY_B
DVREF+_B
VOL_LED_B
J_VOLA_2
J_VOLA_2
LED_GND_B
STOP
LED_SUPPLY
DGND
LED_GND
J_VOLA
DVREF+
KEY3
VOL_LED
COM B
A
1
3
2
: +B SIGNAL LINE
: +B SIGNAL LINE
REMOTE SENSOR CIRCUIT
D6512
B3AAA0000884
TO
MAIN CIRCUIT
(CN2001) ON
SCHEMATIC
DIAGRAM- 4
1
2
ZJ6801
SA-AK270EB / SA-AK270EG
87
18.5. (G) Deck Circuit
SA-AK270EB/EG DECK CIRCUIT
SCHEMATIC DIAGRAM - 8
DECK CIRCUIT
: TAPE PLAYBACK SIGNAL LINE
: TAPE RECORD SIGNAL LINE
: +B SIGNAL LINE
: -B SIGNAL LINE
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
D
E
F
H
G
C
2
1
2
1
Vcc
Nor/Cro
SW
ALC
PB/REC
SW
REC
Lout
REC
Lin
TPS
GAIN
ADJ
ALC
LOW
OUT
TPS
PB
L out
Rout
PB
PB
L EQ
PB
R EQ
PB
L NF
PB
Lin
PB
Rin
RF
GND
REC
Rout
REC
Rin
TPS
Out
PB
R NF
REC AMP (R)
REC AMP (L)
PB AMP (R)
PB AMP (L)
Rec
Mute
Mute
TPS
PB
Rec
Rec
Rec
PB
PB
-+
-
+
ALC
PB Rec
Rec
PB
NOR/Chro
LOGIC
RIPPLE
REJECTION
REC/PB
LOGIC
DGND
IC1001
12
13
14
15
16
17
18
19
20
21
22
10
5
4
3
2
1
6
7
8
9
11
1
4
2
3
5
1
4
2
3
5
MOTOR_GND
VREF-
AN6
AN7
PLVCC
MOTOR
GND
VREF+
7
9
10
15
18
19
16
17
12
11
11
14
13
13
8
4
1
3
2
2
6
5
5
21
20
20
4
2
1
3
5
6
1
5
4
2
3
3
2
6 7
4 5
1
9
8
VREF+
VREF-
REC
DMT
BP
BP
AF_GND
REC Lin
REC Rin
AF_GND
PB Rout
PB Rout
NC
PHOTO
9V_GND
AN6
PLUNGER
MOTOR_12V
MOTOR_GND
MOTOR
MOTOR
AN7
9V(D9V)
PB Lout
B1GDCFGH0002
B1ACKD000006
B1GDCFGH0002
B1GBCFGH0001
G2ZZ00000024
B1ABCF000011
B0ACCK000005
2SD09650RA
470
100K
100K
1K
33K
33K
1K
3.3K
27K
47K
470
1K
470
1K
16V47
4.7K
22K
50V1
4.7
1000p
2.2K
10K
16V33
16V22
2.2K
1500p
1500p
4.7M
50V4.7
270P
10V220
10K
10K
50V3.3
50V3.3
820P
18K
18K
820P
1.5K
16V100
50V1
1500p
0.027
1000p
1.5K
50V1
16V100
33
0.027
1000p
50V2.2
1500p
22K
16V10
0.01
0.01
22K
270P
1500P
50V0.1
10K
0.01
10K
50V2.2
16V10
0.033
470
0.033
4.7K
22k
15K
12K
1000p
2200p
2200p
50V1
10K
1.5K
16V100
4.7k
10K
4.7
4700p
0.047
4.7K
270K
12K
16V47
3300p
R1309
Q1304
R1106
C1210
R1206
R1209
R1110
R1210
R1109
Q1315
Q1315
R1343
R1344
R1342
R1374
R1345
R1341
Q1314
Q1314
CN1305
R1314
Q1303
C1324
R1338
R1334
IC1000
IC1000
C1AA00000612
ANALOG SWITCH
C1323
R1333
Q1309,Q1310
B1AAGC000006
BIAS SWITCH
C1316
R1205
R1305
C1305
C1308
R1105
C1110
R1303
C1304
C1123
C1307
R1318
R1403
C1109
C1209
L1302
C1205
R1203
R1103
C1105
R1202
C1203
C1201
C1202
C1204
R1201
33
C1221
R1102
C1101
C1103
R1101
C1104
C1121
C1107
1500P
C1206
C1102
R1304
C1208
C1371
C1222
R1371
C1223
C1207
C1301
R1204
C1122
R1104
C1106
C1108
C1303
R1302
C1302
IC1001
AN7326K
DECK R/P IC
R1329
R1404
R1328
R1401
C1317
Q1312
Q1312
C1315
C1314
C1320
Q1317
Q1317
B1ABGC000005
BEATPROOF LEVELSWITCH
R1337
R1335
C1319
D1301
D1301
R1331
R1332
R1330
C1321
Q1310
L1301
C1318
Q1316
R1327
R1402
R1405
C1311
CP1902
C1312
VREF+
PHOTO
AN6
AN7
REC
VREF-
VREF-
D9V
RECH1
AN7
VREF-
RECH1
AN6
VREF+
RECH1
PBL_IN
PBRIN
TPS
D9V
D9V
PBROUT
PBLOUT
9VGND
GND
PHOTO
PHOTO
HALF2
VREF-
SWITCH
SWITCH
SWITCH
REC:H
SWITCH
SWITCH
VCC
GND CTRL2 CTRL1
SW
TO
MAIN CIRCUIT
(CN2011) ON
SCHEMATIC
DIAGRAM - 2
WR1903
TO
DECK MECHANISM
(CS971) ON
SCHEMATIC
DIAGRAM-9
PBLIN
ERASE
GND
SIGNAL
PBRIN
CP1301
ERASE
HEAD
R/P
HEAD
LCH
RCH
Q1309
0
R1061
0
R1380
GND SHIELDING
0
R1063
0
R1064
16V10
C1326
6
SA-AK270EB / SA-AK270EG
88
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