DOWNLOAD Panasonic SA-AK270EB / SA-AK270EG Service Manual ↓ Size: 14.36 MB | Pages: 120 in PDF or view online for FREE

Model
SA-AK270EB SA-AK270EG
Pages
120
Size
14.36 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / CD STEREO SYSTEM
File
sa-ak270eb-sa-ak270eg.pdf
Date
PREV: Panasonic SA-AK27 (serv.man2) Service Manual

Panasonic SA-AK270EB / SA-AK270EG Service Manual ▷ View online

18 Schematic Diagram
18.1. (A) CD Servo Circuit
C7223
50V4.7
D7650
MAZ80560ML
C7225
1000P
50V1
C7227
1k
R7217
LB7262
0.1
C7263
R7218
1k
LB7264
LB7263
50V1
C7228
C7226
1000P
C7217
0.1
C7244
0.015
82k
R7211
100
R7221
C7231
6.3V220
C7230
0.1
820
R7212
C7241
1000P
C7218
0.082
C7216
680P
0.47
C7102
0.1
C7204
16V10
C7235
C7234
0.1
C7161
0.1
C7203
6.3V220
C7315
0.47
C7339 0.018
3.3k
R7315
10k
R7328
R7330
5.6K
10k
R7111
C7142
3300P
10
R7253
C7166
0.01
S7201
REST SW
1M
R7220
R7214 470
3
1
2
X7201
H2B169500005
1K
R7254
C7155 0.1
0.1
C7154
10
C7164
10
C7165
470P
0
0
0
C7253
0.1
C7233
C7232
6.3V220
0.1
C7243
6
5
8
9
11
12
10
18
15
17
16
20
19
13
14
7
2
1
1
4
3
22
22
21
CN7002
0.022
C7107
79
77
76
78
49
47
48
50
74
71 72
67 68
56
55
58
57
52
51
54
53
65 66
61 62
59 60
64
63
70
69
73
75
10
8 7
9
12 11
99
100
95
94
96
97
90
91
89
93
92
98
4
6 5
2 1
3
81
82
80
86
87
88
84
83
85
45
19
17
15 14
16
18
43
23
21 20
22
41
24
39
37
33
35
34
29
30
27
26
28
32
31
36
38
25
40
42
44
13
46
IC7001
MN6627954MA
SERVO PROCESSOR/
DIGITAL SIGNAL PROCESSOR/
DIGITAL FILTER D/A CONVERTER
C7264
0.1
C7601
6.3V33
4.7
R7601
C7614
6.3V100
C7670
0.1
C7626
0.1
Q7601
B1ADCF000001
LASER POWER DRIVE
5.6
R7650
+
SPINDLE MOTOR
C7334
10V220
C7335
0.1
+
TRAVERSE MOTOR
C7613
0.1
GND1
6
5
8
9
10
12
11
7
2
1
4
3
14
13
16
15
CN7001
1k
R7327
18k
R7349
10
R7336
100
R7335
1k
R7332
22k
R7331
3.3k
R7323
330
R7325
1k
R7329
C7352
0.018
1k
R7339
C7338
0.056
19
18
17
20
15
16
14
12
9
11
10
13
22
23
21
28
27
24
25
26
2
1
6
7
8
3
4
5
IC7002
BA5948FPE2
4 CH DRIVE IC
MLD
7.5V
MCLK
MDATA
RST
STAT
BLKCK
PGND
3.3V
ST_IN
TX
LD SW
DGND
ST_CLK
AGND
AGND
DGND
ST_REQ
RESET_SW
LCH OUT
RCH OUT
LOADING
A9
A1
1
TRP
TR
VP
BA1
A0
A2
A4
A6
A8
A7
A5
A3
A1
A10
NWE
BA0
PC
NRAS
NCAS
PRAMVDD15
PRAMVDD33
PRAMVSS33
SPOUT
F
A
B
E
GND
T-
F-
F+
T+
LPD
VREF
LD GND
GND (GUARD)
GND (GUARD)
LD
VCC
6
5
8
9
10
12
11
7
2
1
4
3
14
13
16
15
PVCC1
D4+
D1-
PVCC2
NC
NC
NC
NC
NC
NC
NC
IN2
NC
PC1
PC2
IN1
GND
PGND1
FO GAIN
GND
IN4
IN3
VCC
FOP
VREF
PGND2
D3+
D2-
D3-
D2+
D1+
D4-
TRV GAIN
[50] ARFFB
RFIN
A
B
F
E
D
C
PD
LD
VREF
CENV
AVDD2
RFENV
AVSS2
IODD2
[26] DVSS1
DVDD1
OSCIN
RFOUT
ARFDC
[49] ARFOUT
CTRCRS
SRVMON0
SRVMON1
DVDD2 [76]
X2
X1
REGON
D5
D7
D8
D9
D15
D13
D11
D10
D12
D14
D6
SDRCK [100]
DRVDD
NTEST
D1
D3
D4
D0
D2
IODD1 [77]
DVSS2
ARFIN
IREF
OUTL
TX
MLD
EXT1
FLAG
ST
AT
NRST
MCLK
EXT2
OUTR
EXT0
PLLF
AVSS1
SMCK
PMCK
DVSS3
BLKCK
MDA
TA
AVDD1
PLLF0
DSLF
DQSYTXT
NSR
VMONON
C
C
C
C
LASER DIODE
11
12
6
8
2
3
GND
VCC
AIN
BIN
VREF
NAOUT
GND
NBOUT
1
2
3
4
5
6
7
8
10
5
4
9
C
W7025
0
W7023
0
W7017
0
W7026
0
W7021
0
W7016
0
W7024
0
W7013
0
W7012
0
W7014
0
W7022
0
W7020
0
W7019
0
W7018
0
W7015
0
W7027
0
M7301*
M7302*
W7005
0
W7029
0
W7028
0
W7007
0
W7006
0
W7008
0
W7009
0
W7010
0
W7001
0
W7003
0
W7004
0
W7002
0
W701
1
0
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
: + B SIGNAL LINE
SA-AK270EB/EG CD SERVO CIRCUIT
CD SERVO CIRCUIT
TO
MAIN CIRCUIT
(CN2801) IN
SCHEMATIC
DIAGRAM - 4
SCHEMATIC DIAGRAM - 1
OPTICAL PICKUP CIRCUIT
(FOR REFERENCE ONLY)
: CD DA SIGNAL LINE
: CD SIGNAL LINE
TP
39
TP
38
TP
37
TP
36
TP
90
TP
28
VREF
TP
51
(RF)
TP
50
TP
88
TP
89
TP
87
TP
86
TP
24
TP
13
TP
12
TP
7
TP
8
TP
9
TP
31
TP
4
TP
3
TP
2
TP
1
TP
11
TP
10
TP
16
TP
14
TP
19
TP
18
TP
17
SA-AK270EB / SA-AK270EG
81
18.2. (B) Main Circuit
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
12
13
14
MAIN CIRCUIT
SCHEMATIC DIAGRAM - 2
SA-AK270EB/EG MAIN CIRCUIT
1/4
2/4
3/4
4/4
: - B SIGNAL LINE
: + B SIGNAL LINE
-9V
MUTE_A
-9V
+9VASP
+9VASP
ASP_DA ASP_CLK
+9VASP
+9VASP
MOTOR_GND
DECK_AD1
DECK_AD2
DECK_MTR
DECK_PL
PLL_CLK
DVREF+
TU_DOUT
TU_DIN
DGND
PLL_CE
PHOTO
REC_L
REC
REC_R
DET_OUT
+9VASP
+9VASP
+9VASP
MOTOR_12V
16V
6
7
5
2
4
3
8
1
51
49
47
45
42
43
40
41
44
46
48
50
25
20
16
15
18
19
17
23
24
21
22
26
38
35
36
30
32 31
27
29 28
34 33
37
39
6
1
4
2 3
5
52
8 9
7
11 12
10
13
14
7
9
10
15
18
19
16
17
12
11
14
13
8
4
1
3
2
6
5
21
20
6
8
9
7
2
1
4
5
3
10
10k
3.3
10k
0.68
0.082
5.6k
18
25V4.7
18
3.3
22k
0.01
0.082
10k
1
1
1
1
1
1
1
1
0.01
0.01
680
0.56
680
0.56
10k
3900p
0.01
3900P
3900P
3.3k
3.3k
1
100
100
100
6.8k
560P
3900p
Q2311,Q2312
B1ABGC000005
MUTING SWITCH
QR2317
B1GDCFGA0018
MUTIING CONTROL
C2197
3300p
R2321
10k
C2315
1
R2323
68k
R2313
100k
R2315
C2302
1
C2304
R2316
R2314
100k
IC2804
C0AABB000125
OP AMP
C2321
47p
R2311
470
C2301
3.3
C2311
6.3V1
C2329 0.01
C2323
47p
C2195
C2193
R2185
R2353
18
R2357
C2357
1000p
R2351
18
R2355
18
R2358
18
R2354
18
R2365
100k
R2366
820
C2365
R2367
22k
C2358
1000p
R2352
R2356
18
R2304
10k
C2330
0.01
C2324 47p
C2322 47P
R2324
68k
C2316
1
R2322
10k
C2202 0.082
C2305
R2302
68k
Q2312
R2312
470
C2312
6.3V1
R2303
C2307 0.082
C2201
4.7
C2196
0.68
C2192
C2194
R2184
R2186
5.6k
C2046
C2066
Q2011
Q2012
C2006
C2026
C2170
33
K2181
0
C2005
C2045
C2025
Q2011,Q2012
B1GBCFJJ0051
SWITCH
C2065
C2190
C2191
R2181 C2183
R2182
C2184
IC2803
IC2803
C1AB00002885
ASP IC
R2183
C2185 0.47
C2187 C2189
C2023
C2021
1
R2023
7.5k
C2022
1
R2022
5.6k
R2024
7.5k
C2024
100P
C2035
R2001
R2002
R2004
5.6k
R2003
5.6k
R2021
5.6k
CN2011
CN3601
R2623
10k
C3703
C3702
1
R3713
27k
R3715
1.2k
R3716 1.2k
R3714
27k
R2626
10k
R2622
47k
C2821 100P
R2823
R2822
R2821
R2621
R2826
100
C2822
560P
C2823
R2722
2.2
C2188
C2186
0.47
GND
SDA
[13]BPF1
[14]BPF2
[15]BPF3
I_PORTR
ROUT
VOL2CAPA
BAS
MID
BAS
VCC
LOUT
NC
NC
NC
NC
NC
VREF
NC
NC
NC
NC
NC
NC
[27]NC
[39]NC
[40]MP_L
[42]AUX_L
SCL
REC_L
CD/USB_L
I_PORTL
PRE-IN
TUNER_L
TAPE_L
PRE-OUT
MID
TRE
VSM
VCC
R-OUT
TGND
L-OUT
CE
NC
PHOTO
TUD_IN
CLK
TO TUNER PACK
J3CCBC000016
TUD_OUT
FM DET/RDS
PRE-IN
REC_R
[50]AUX_R
[52]MP_R
PL
REC_OUT
PBR
A_GND
DGND
BP
DMT
DVREF
RECIN_L
RECIN_H
VREF_GND
RECIN_R
A_GND
CD/USB_R
TUNER_R
MOTOR_H
+9V
PBL
DECK_AD1
MO_GND
MOTOR_12V
DECK_AD2
TAPE_R
MID
BAS
BAS
TRE
MID
Q2311
QR2317
TO
DECK CIRCUIT
(CN1305) IN
SCHEMATIC
DIAGRAM - 8
33
0.01
C3723
C3724
1
4
2
6
10
11
12
13
14
BH
BG
BF
BE
BB
BA
: MUSIC PORT SIGNAL LINE
: TAPE PLAYBACK SIGNAL LINE
: TAPE RECORD SIGNAL LINE
: CD SIGNAL LINE
: FM/AM SIGNAL LINE
: MAIN SIGNAL LINE
TO MAIN SECTION (2/4)
TO MAIN SECTION (3/4)
SA-AK270EB / SA-AK270EG
82
15
16
17
18
19
20
21
22
23
24
25
26
27
28
A
B
D
E
F
H
G
C
MAIN CIRCUIT
SCHEMATIC DIAGRAM - 3
SA-AK270EB/EG MAIN CIRCUIT
1/4
2/4
3/4
4/4
HP_R
HP_L
MUTE_F
MUTE_F
MUTE_S
MUTE_S
DC_DET
F_HOP
MOD_DA
MOD_DA
6
5
8
9
11
12
10
14
15
13
7
2
1
4
3
17
16
R2364
1
R2359
3.3k
R2361
3.3k
R2363
1
Q2359,Q2360
B1ABGC000005
SWITCH
R2360
3.3k
Q2360
R2362
3.3k
R2338
27k
R2346
12k
R2333
2.7k
R2335
10k
C2343
0.01
R2337
27K
Q2335
Q2335,Q2336
B1ABGC000005
SWITCH
R2345
12k
C2341
0.22
C2345
0
R2343
6.8k
C2344
0.01
R2334
2.7k
C2342
0.22
C2346
0
R2344
6.8k
CN2341
R2336
10k
Q2336
MOD_DA
Fan
FHOP
MUTE F_SW (MODE 2)
MUTE S_C (MODE 1)
DC_DET
FRONTL
AGND
FRONT R
SIGNAL A_GND
Q2359
TO
D-AMP CIRCUIT
(CN5050) IN
SCHEMATIC
DIAGRAM - 12
AGND
AGND
AGND
1
4
2
6
10
11
12
13
14
BK
BI
: MAIN SIGNAL LINE
TO MAIN SECTION (1/4)
TO MAIN SECTION (4/4)
SA-AK270EB / SA-AK270EG
83
1
2
3
4
5
6
7
8
9
10
11
12
13
14
I
J
L
M
N
P
O
K
MAIN CIRCUIT
SCHEMATIC DIAGRAM - 4
SA-AK270EB/EG MAIN CIRCUIT
1/4
2/4
3/4
4/4
: - B SIGNAL LINE
: + B SIGNAL LINE
R2907
1K
1
PLUNGER
UD
SENSOR
CW
ST
SW
OPEN
SW
CCW
CLOSE
SW
PLAY
SW
REG
VOL_JOG
BOTTOM
SW
[31]IPOD-Txd
[32]IPOD-Rxd
[33]USB_RST(CLK)
ASP-CLK
HP_SW
PA_SW
DECK-PLUNGER
DCDET
SMPS_BP
DECK-MOTOR
DECK-PHOTO
PCONT
IPOD_RXD
HP_SW
PA_SW
RESTSW
HOME_SW
MDATA
MCLK
DVREF+
CNVSS
PLAY_SW
OPEN_SW
CLOSE_SW
CHG_PL
BOTTOM_SW
UD_SENSOR
USB_SDA
RESET
DVREF+
VREF+
VREF+
BLKCK
USB_SCL
MUTE_F
PHOTO
ASP_DA
USB_RST-UART_CLK
DC_DET2
PCONT
MOD_DA
AM_BP
DECK_MTR
DECK_PL
DC_DET
MUTE_A
ASP_CLK
DPORT_PLYPAU_BUSY
USB_TE
FL_CS
DBASS_JOG2
DBASS_JOG
REC
FL_DA
FL_CLK
VOL_LED
USB_VE
ME
VREF+
SYNC
MUTE_S
RMT
IPOD_TXD
PLL_CE
TU_DIN
TU_DOUT
PLL_CLK
CHG_CW
ST_SW
DGND
DBASS_LED
CHG_CCW
MLD
F_HOP
USB_IRQ
STATUS
PA_IN_L
PA_IN_R
USB_RST-
UART_CLK
DC-DC_GND
USB_IRQ
USB_SDA
USB_TE
DGND
USB_SCL
USB_VE
ME
ST_REQ
ST_CLK ST_IN
DC-DC_GND
CD_RST
DVREF+
MOTOR_GND
STATUS
BLKCK
RESTSW
MLD
MCLK
MDATA
CD-L
A_GND
CD-R
DECK_AD2
DECK_AD1
KEY1
CD_RST
V_JOG_A
KEY2
KEY3
EJECT
VREF+
CD+8V
CD_3.3V
CD_3.3V
USB+5V
2
7
8
5
4
3
6
3
2
98
94
95
92
91
93
97
96
1 2 3 4 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
100
99
80
78
76
77
79
87
86
85
84
83
82
81
88
89
90
69
67
65 64
66
68
70
51
49
45
47
46
41
44
42
43
48
50
39
37
35
32
31
34
33
36
38
40
53
55
57
62
60 59
61
63
58
56
54
52
75
73
71
72
74
6
5
8
9
11
12
10
18
15
17
16
20
19
13
14
7
2
1
4
3
22
21
6
5
8
9
11
12
10
18
15
17
16
20
19
13
14
7
2
1
1
4
3
22
22
21
470k
22k
100
3.3k
4.7k
10k
100
100
100
1k
560p
1k
10k
100
0
10M
100
22p
1k
100
220
18p
1k
100
100
100
100
1k
100
1k
1k
100
100
100
47k
47k
47k
100
100
1k
1k
100
100
100
100
100
100
100
1k
100
100
100
100
100
1k
1k
0.1
B0ACCK000005
H2B100500004
IC2951
EEPROM IC
(NOT SUPPLIED)
R2952
22k
R2743
Q2743
Q2743
B1ACKD000006
DECK SUPPLY
CONTROL SWITCH
Q2745
B1GBCFLL0037
DECK SUPPLY (PCONT)
CONTROL SWITCH
R2744
4.7k
R2745
1k
R2951
R2637
C2951
0.022
R2953 4.7k
R2832
100
C2953 330p
R2878
R2689
10k
R2881
1k
R2889
5.6K
R2886
R2675
R2679
R2685
10K
R2892
R2600
100k
R2895
C2895
C2897
560p
R2890
1k
R2894
R2897
R2893
R2609
R2809
R2611
R2610
R2830
R2812
47k
C2813
3.3
Q2812
B1GBCFLL0037
DECK SUPPLY (PCONT)
CONTROL SWITCH
C2613
220
C2812
1
D2812
C2611
R2813
1M
R2819
R2829
R2815
X2815
X2910
X2910
C2960
R2837
R2835
R2839
R2841
R2845
R2844
R2843
R2838
R2848
R2836
R2842
R2846
R2638
R2647
R2644
R2854
R2853
R2852
R2861
R2855
R2858
R2857
R2856
R2636
3.9K
R2635
3.9K
R2620
22k
R2828
R2827
R2820
10k
R2833
R2818
R2865
R2866
R2863
R2807
R2875
1k
R2877
R2874
R2876
IC2801
RFKWAK270PL
MICROPROCESSOR
R3204
0
R3205
100k
C2002
0.01
R2061
470
R2064
3.9K
R2062
470 R2063
3.9K
R2044
4.7k
R2041
2.7k
R2043
4.7k
R2674
10k
R2042
2.7k
C2054
CN3200
CN2801
C2881
1000p
R2631
4.7K
D2051
R2632 4.7k
Xcin
Vcc
Xin
RMT
/NMI
Xout
Xcout
Vss
Vss
RDS_DAT
KEY1
KEY3
KEY2
LVL_METER
AVSS
DECK AD1
[78]MCLK
[79]/RESET_SW
[80]HOME_SW
[97]DECK_AD2
[98]Vref
[99]Avcc
[100]DEMO_SEL
DECK_EJECT
CD_RST
NC
NC
NC
NC
NC
NC
NC
NC
NC
F_HOP
BYTE
RDS_CLK
CS
EE_DAT
EE_CS
EE_CLK
NC
NC
GND
VCC
DGND
TERR
VCC
BASS
JOG1
BASS
JOG2
MMOD0
VERR
MUTE_A
MUTE_DA
EE_CS/EFP/EPM
FL_CS
EE_DAT
PCONT
DCDET1
EE_CLK
BLKCK
USB_SCL
MUTE_S
PLL_SD
SW_LVL2
USB_SDA
SYNC
PLL
CLK
TUNER
IN
SW_LVL1
MUTE_F
TUNER
OUT/ST
D3.3V
MUSIC PORT
Mmodo.error
MLD
MDATA
BLKCK
MCLK
MOTOR_GND
D5V
DGND
DGND
/RST
STIN
STREQ
DGND
CD_RST
CD_MLD
DGND
DGND
CD_CLK
TO
USB MODULE
CIRCUIT
(P901) IN
SCHEMATIC
DIAGRAM -10
TO
CD SERVO
CIRCUIT
(CN7002) IN
SCHEMATIC
DIAGRAM - 1
STCLK
CD_STAT
USB_RST
CD_DATA
USB_SDA
USB_SCL
USB_IRQ
STAT
LOADING
Verify.error
Timeout.error
/REST_SW
L
R
TX
ST_IN
A_GND
CD_GND
ST_REQ
CD_3.3V
ST_CLK
CD_GND
+7.5V
LD_SW
CD_GND
1
Q2812
Q2745
47k
[51]DMT
[52]DECK REC
[53]VOL LED
[54]FL_CLK
[55]FL_DOUT
B0JAME000114
EFP_CNVss
EFP_RESET
ASP-DAT
BUSY
USB.IRQ/WR
START
STATUS
MLD
MDATA_OUT
H0A327200115
IC2809
C1BB00001137
IC2809
RDS IC
7
5
6
1
2
4
3
10
12
14
15
16
13
11
8
9
FLOUT
VSSa
RDQA
RDS-ID
MPXin
VREF
VDDa
VSSD
VDDD
MODE
RST
RDCL
XIN
XOUT
CIN
TEST
DET_OUT
CD_3.3V
L2901
L2901,L2902
G0C101JA0052
C2907
560P
C2906
47
C2905
470P
C2904
50V4.7
L2902
RDS_DA
R2905
2.2K
R2906 220
DC-DC_GND
C2908 47P
C2909
47P
C2910
470P
C2911 6.3V47
X2901
X2901
H0H433400002
RDS_CLK
R2908
220
R2909
1K
RDS CCT
1
3
2
K9ZZ00001279
E2001
CN2001
TO
MUSIC CIRCUIT
(ZJ6801) ON
SCHEMATIC
DIAGRAM- 7
1
2
DBASS_LED
RDS_DA
RDS_CLK
15
BH
BG
BF
BE
BA
BB
: MUSIC PORT SIGNAL LINE
: CD SIGNAL LINE
: USB SIGNAL LINE
: TAPE RECORD SIGNAL LINE
TO MAIN SECTION (4/4)
TO MAIN SECTION (1/4)
SA-AK270EB / SA-AK270EG
84
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