Panasonic SA-AKX74PH, SA-AKX74PN, SA-AKX94PH, SA-AKX74PR, SA-AKX94PR Diagram
PSG1207012SE
CD Stereo System
Model No. SA-AKX74PH
SA-AKX74PN
SA-AKX94PH
SA-AKX74PR
SA-AKX94PR
Product Color: (K)...Black Type
Subject : Updates on Block Diagram, Schematic Diagram, Printed Circuit Board,
Exploded View & Parts List.
A6
Please file and use this supplement manual together with the service manual for
Model No. SA-AKX74PH/PN-K Order No. PSG1203050CE
Model No. SA-AKX94PH-K Order No. PSG1203051CE
Model No. SA-AKX74/94PR-K Order No. PSG1204034AE
TABLE OF CONTENTS
PAGE PAGE
1Notes-----------------------------------------------------------------2
2 Block Diagram (Updates) -------------------------------------- 3
2.1. Power Supply (SA-AKX74PH/PN-K) ----------------- 3
2.2. Power Supply (SA-AKX94PH-K) ---------------------- 4
3 Schematic Diagram (Updates) ------------------------------- 5
3.1. Main(MICON) Circuit (SA-AKX74PH/PN-K) -------- 5
3.2. Panel Circuit (SA-AKX74PH/PN-K)------------------- 8
3.3. CD Interface, Mic and Voltage Selector Circuit
(SA-AKX74PH/PN-K)------------------------------------- 9
3.4. D-Amp Circuit (SA-AKX74PH/PN-K) ----------------10
3.5. SMPS Circuit (SA-AKX74PH/PN-K) -----------------11
3.6. CD Interface, Mic and Voltage Selector Circuit
(SA-AKX94PH-K)-----------------------------------------13
3.7. SMPS Circuit (SA-AKX94PH-K) ----------------------14
4 Printed Circuit Board (Updates)----------------------------16
4.1. Pane l, Remote Sensor, USB and Music Port
P.C.B. (SA-AKX74PH/PN-K)---------------------------16
4.2. SMPS and D-Amp P.C.B. (SA-AKX74PH/PNK)------------------------------------------------------------- 17
5 Exploded View (Updates)------------------------------------- 18
5.1. Packaging (SA-AKX74PH/PN-K) --------------------18
5.2. Packaging (SA-AKX94PH-K) -------------------------19
6 Electrical & Mechanical Replacement Parts List
(Updates) ----------------------------------------------------------21
© Panasonic Corporation 2012. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
1Notes
Background:
• For improvement of quality and performance.
This supplement includes revised contents to the original service manual for below sections:-
1. Block Diagram
2. Schematic Diagram.
3. Printed Circuit Board.
4. Exploded View.
5. Electrical & Mechanical Replacement Parts List.
2
2 Block Diagram (Updates)
2.1. Power Supply (SA-AKX74PH/PN-K)
With reference to original service manual (section 14.4) on pages 77.
IC5799
MIP2F20MSSCF
SWITCHING MODE POWER
SUPPLY CONTROL
CL 3
VCC 4
D5
FB 2
VDD 1
P5701
AC INLET
F1
DZ5701
VOLTAGE SELECTOR P.C.B.
S5701
VOLT ADJ
IC5701
C5HACYY00004...PN
C5HACYY00005...PH
SWITCHING
REGULATOR
D
1
VCC
4
D5724,D5727
OCP/BD
7
FB
6
D5795
L5701
324
1
TH5702
FOR PH
TL7*TL5*
BLKBLK
TL8*TL6*
REDRED
D5701
D5726
D5729
FOR PH FOR PN
4
5
6
7
8
2
1
D5723
14
15
11
12
9
10
Q5721
VOLTAGE
REGULATOR
D5722
Q5722
CURRENT
LIMITING
4
5
6
7
8
2
1
SWITCH
D5721
Q5720
SWITCH
D5728
FOR PH
14
15
11
12
9
10
D5793
D5702
SMPS P.C.B.
T5751
SUB
TRANSFORMER
D5798
6
5
2
1
3
3
4
1
D5730
2
3
4
T5701
MAIN
TRANSFORMER
4
5
6
7
8
D5731
2
1
4
D5725
3
PC5799
FEEDBACK
PC5702
SYNC
PC5701
FEEDBACK
PC5720
FEEDBACK
MAIN P.C.B.
8
D5896
7
10
IC5899
C0DAZYY00039
C0DAEYY00040
SHUNT
REGULATOR
2
1
4
3
KC RR
Q5898
SYNC SWITCH
SYS3.3V SYS3.3V
CHANGE
PCONT
(IC5899)
SYNC
CN2007CN5802
88
SYNC SYNC
CN2007CN5802
77
PCONT PCONT
CN2007CN5802
1414
SYNC
PCONT
TO POWER SUPPLY
BLOCK (2/2)
SYS3.3V
2
QR5810
TH5860
PCONT
SWITCH
QR5801
SWITCH
Q5860,Q5861,Q5862
TRANSFORMER
TEMPERATURE
DETECT
QR5802
DC DETECT
FEEDBACK
CIRCUIT
DCDET2
DC16V
CN2007CN5802
CN2007CN5802
D5804
+35V SENSE +35V SENSE
-35V SENSE
+35V SENSE
-35V SENSE
IC5801
C0DAZYY00039
SHUNT
REGULATOR
Q5899,QR5811,QR5812
CN2007CN5802
CN2007CN5802
ZJ5901*CN5801
ZJ5901*CN5801
Q2035
AM
BEATPROOF
CIRCUIT
DCDET2 DC DET PWR
1010
DC16V
1313
5,65,6
-35V SENSE
1,21,2
+35V SENSE
5,65,6
-35V SENSE
1,21,2
+35V SENSE +35V SENSE
-35V SENSE
+35V SENSE
-35V SENSE
ZJ5000*ZJ2001*
5,65,6
-35V SENSE
ZJ5000*ZJ2001*
1,21,2
35V
-35V
+5V
5V
+5V+5V
CN2011CN5902
82
SMPS BP
+35V SENSE
-35V SENSE
SMPS BP
DC DET PWR
35V
-35V
FROM/TO
SERVO & SYSTEM CONTROL
DC DET PWR
PW +16V
PW +5V
3
1
4
2
1
14
D5803
15
11
D5802
12
9
D5801
10
1
2
D-AMP P.C.B.
ECO CTL
TEMP DET
ECO CTL
TEMP DET
FROM/TO
SERVO & SYSTEM CONTROL
TH5861
TEMP DET
ECO CTLECO CTL
CN2007CN5802
1111
TEMP DET
CN2007CN5802
99
SECONDARYPRIMARY
NOTE: “ * ” REF IS FOR INDICATION ONLY
SA-AKX74PH/PN POWER SUPPLY (1/2) BLOCK DIAGRAM
3
2.2. Power Supply (SA-AKX94PH-K)
With reference to original service manual (section 14.4) on p ages 81.
IC5799
MIP2F20MSSCF
SWITCHING MODE POWER
SUPPLY CONTROL
CL 3
VCC 4
D5
FB 2
VDD 1
P5701
AC INLET
F1
DZ5701
VOLTAGE SELECTOR P.C.B.
S5701
VOLT ADJ
IC5701
C1ZBZ0004646
SWITCHING
REGULATOR
VCC
2
D5724,D5727
OCP/BD
5
DRIVE
8
FB
4
D5795
L5701
324
SMPS P.C.B.
T5751
SUB
TRANSFORMER
D5798
6
5
2
1
D5793
3
3
4
1
D5730
1
D5701
TL7*TL5*
BLKBLK
TL8*TL6*
REDRED
2
3
4
T5701
MAIN
TRANSFORMER
5
4
Q5721
D5726
D5729
Q5700
SWITCH
D5723
SWITCH
VOLTAGE
REGULATOR
D5722
Q5722
CURRENT
LIMITING
SWITCH
D5702
D5721
Q5720
D5728
D5731
D5725
6
8
7
2
1
4
3
PC5799
FEEDBACK
PC5702
SYNC
PC5701
FEEDBACK
PC5720
FEEDBACK
8
D5896
7
10
IC5899
C0DAZYY00039
C0DAEYY00040
SHUNT
REGULATOR
2
1
4
3
KC RR
Q5898
SYNC SWITCH
SYS3.3V SYS3.3V
CHANGE
PCONT
(IC5899)
SYNC
CN2007CN5802
88
SYNC SYNC
CN2007CN5802
77
PCONT PCONT
CN2007CN5802
1414
QR5810
TH5860
PCONT
SWITCH
QR5801
SWITCH
Q5860,Q5861,Q5862
TRANSFORMER
TEMPERATURE
DETECT
DCDET2
Q2035
AM
BEATPROOF
CIRCUIT
DCDET2 DC DET PWR
CN2007CN5802
1010
2
1
16
QR5802
DC DETECT
D5803
17
13
D5802
14
11
D5801
12
1
2
FEEDBACK
CIRCUIT
DC16V
CN2007CN5802
D5804
+35V SENSE +35V SENSE
-35V SENSE
+35V SENSE +35V SENSE
-35V SENSE
IC5801
C0DAZYY00039
SHUNT
REGULATOR
CN2007CN5802
CN2007CN5802
ZJ5500*CN5801
ZJ5500*CN5801
DC16V
1313
5,65,6
-35V SENSE
1,21,2
5,65,6
-35V SENSE
1,21,2
+35V SENSE +35V SENSE
-35V SENSE
+35V SENSE
-35V SENSE
-35V
ZJ5000*ZJ2001*
5,65,6
-35V SENSE
ZJ5000*ZJ2001*
1,21,2
35V
D-AMP P.C.B.
MAIN P.C.B.
SMPS BP
+35V SENSE
-35V SENSE
SYNC
PCONT
SMPS BP
DC DET PWR
35V
-35V
TO POWER SUPPLY
BLOCK (2/2)
FROM/TO
SERVO & SYSTEM CONTROL
SYS3.3V
DC DET PWR
PW +16V
2
3
1
NOTE: “ * ” REF IS FOR INDICATION ONLY
TEMP DET
TEMP DET
CN2007CN5802
99
TEMP DET
TEMP DET
FROM
SERVO & SYSTEM CONTROL
TH5861
SECONDARYPRIMARY
SA-AKX94PH POWER SUPPLY (1/2) BLOCK DIAGRAM
4
3 Schematic Diagram (Updates)
3.1. Main(MICON) Circuit (SA-AKX74PH/PN-K)
With reference to original service manual (section 16.3) on pages 87, 91 & 96.
1
A
SCHEMATIC DIAGRAM - 5
MAIN(MICON) CIRCUIT
B
2 3 4 5 6 7 8 9 10 11 12 13 14
: +B SIGNAL LINE
: -B SIGNAL LINE
: CD AUDIO INPUT SIGNAL LINE
: AUX/TUNER/MUSIC PORT/MIC AUDIO INPUT SIGNAL LINE
: AUDIO OUTPUT SIGNAL LINE
: AM SIGNAL LINE
: FM SIGNAL LINE
: USB SIGNAL LINE
P1
B
C2067
1
R2162 0
LCH_IN
R2152
15K
C2028 1
C2032 1
C2029
C2020
C2031 1
C2034
C2024
1000P
1
10
10C2021
1C2033
1
C2026
1000P
C2053
1000P
C2054
1000P
TUNER_L
C
D
AUX_L
MPORT_L
CD_L
DAGND
CD_R
MPORT_R
AUX_R
TUNER_R
R2012
R2103
R2154
15K
680
680
E
F
G
RCH_IN
C2061
C2043
C2049
1000P 100P
C2057 50V4.7
C2050
C2046
1000P 100P
50V1
10V33C2056
R2375
150K
B1ABCF000176
40
41
42
43
44
45
46
47
48
49
50
51
Q2041
SWITCH
IN4B
NC
IN5B
NC
IN6B
VREF
IN6DIFF
IN6A
NC
NC
IN5A
NC
IN4A
C2193
38 3536 3032 31 2729 2834 333739
IN3B
IN3A
1
C2072 3300P
R2051 1K
C2070 0.47
IN1B
IN2B
VOLINB
TONEHBTONEHA
RECOUTB
MONOUTB
[26] SURTC
[39] NC
IC2000
C1AB00003256
ASP
[14] BPF2
[1] NC
[15] BPF3
RECOUTA
MONOUTA
VOLINA
IN2A
IN1A
61423 552897
3300P10.47C2071
C2073
R2052 1K R2193 0
C2068
R2054
0
3300P
R2056 4.7K
C2082
R2058 4.7K
0.01
0.01
0.018
0.47
R2373
C2074
0.01
C2075
150K
C2080
C2076
C2078
C2192
1
26
SRFIL
25
INT
TONEB1B
TONEB2B
TONEM1B
TONEM2B
EXTSENSE
24
VOL2CAPB
23
OUTB
22
V+
21
SCL
20
SDA
19
GND
18
OUTA
17
VOL2CAPA
16
15
14
TONEB1A
TONEM1A
TONEM2A
TONEB2A
BPF1
11 1210 13
C2153
10
0.01
0.018
0.47
R2061
6.8K
C2081
R2060 6.8K
C2077
C2079
R2057 4.7K
R2059 4.7K
C2083 0.022
Q2037
B1ABCF000176
SWITCH
Q2042
B1ABCF000176
SWITCH
C2066
50V1
Q2040
B1ABCF000176
SWITCH
Q2001
B1ABCF000231
SWITCH
C2085
50V3.3
50V3.3C2086
150KR2062
C2084 C2088
0.082 0.082
R2355
12K
R2356
1K
R2374
1K
R2377
1K
R2246
100
R2063
15K
10K
C2087
4.7
R2064
C2242
0.1
R2372
1K
R2077
1K
15K
C2092
0.068
C2090
50V1
R2078
56K
50V3.3
C2089
C2093
16V1000
R2129
0
33
R2079
CHANGE
(R2063)
CLIP_ATTN
LEFT-OUT
PW_+9V_1
ASP_CLK
AGND
RIGHT-OUT
PW_+9V
ASP_DATA
SYS3.3V
BASS_SHIFT
MIC_GND
MIC
R2025
3.9K
R2024
3.9K
R2294
6.8K
R2295
6.8K
C2041
6.3V100
C2241
0.1
R2030
R2031
C2037
0.047
47K
47K
R2029
47K
R2032
47K
C2047
50V1
C2048
50V1
R2039
22K
C2055 C2060
V-
R2426
68K
R2044
22K
47P 100P
675
C2059 C2064
R2043 R2045
22K 22K
R2427
243
47 100
68K
8
V+
C0ABBB000067
1
IC2002
BUFFER AMP
R2050
22K
R2053
22K
TO MAIN(MICON)
CIRCUIT (2/10)
2
1
MI: MAIN(MICON): SCHEMATIC DIAGRAM - 5 ~ 14
DA: MAIN(D-AMP): SCHEMATIC DIAGRAM - 15 ~ 16
H
P1
TO MAIN(MICON)
CIRCUIT (6/10)
1/10
6/10
2/10
7/10
3/10 5/10
4/10
8/10
9/10 10/10
SA-AKX74PH/PN MAIN(MICON) CIRCUIT
5
57 58 59 60 61 62 63 64 65 66 67 68 69 70
SCHEMATIC DIAGRAM - 9
MAIN(MICON) CIRCUIT
B
SW_LV1
TO MAIN(MICON)
CIRCUIT (4/10)
SW_MUTE
UP_DGND
SW_LV2
R2089
10K
IC2004
DUAL OP-AMP
R2110
10M
C2111
0.01
Q2004
BUFFER
Q2005
BUFFER
R2111
47K
C2109
50V1
C0ABBB000067
B1GDCFJJ0047
B1GDCFJJ0047
: +B SIGNAL LINE
: -B SIGNAL LINE
R2124
27K
C2113
15K
100P
675
C2112
R2119
R2132
R2133
R2125
24V-3
R2131
47P 1K
10K
1K
0
1K
: CD AUDIO INPUT SIGNAL LINE
: AUX/TUNER/MUSIC PORT/MIC AUDIO INPUT SIGNAL LINE
CHANGE
(R2124)
C2122
R2147
15K
10
8
V+
1
B1GDCFJJ0047
MUTING CONTROL
C2119
6.3V220
C2125 C2131
1 0.01
R2145
10K
C2118
0.56
Q2006
C2124
R2151
18K
R2180
100K
R2149
10
470
R2148
1K
R2167
2.2K
B1ABCF000176
SW LEVEL CONTROL
Q2008
B1ABCF000176
MUTING
: AUDIO OUTPUT SIGNAL LINE
: AM SIGNAL LINE
R2179
12K
Q2009
Q2010
B1ABCF000176
SW LEVEL CONTROL
: FM SIGNAL LINE
: USB SIGNAL LINE
AGND
MUTE_F
F_HOP
DC_DET_AMP
MODE_DA
PW_+5V
GND
C2238
2.2
1
SUBWOOFER
2
SIGNAL AGND
3
AGND
4
MUTE F
5
FHOP
DC_DET
6
7
MOD_DA
8
+5V
9
+5V GND
CN2011
9
L
TO
D-AMP CIRCUIT
(CN5902)
IN SCHEMATIC
DIAGRAM - 21
1
A
B
C
D
E
F
P1
MI: MAIN(MICON): SCHEMATIC DIAGRAM - 5 ~ 14
DA: MAIN(D-AMP): SCHEMATIC DIAGRAM - 15 ~ 16
G
3/10 5/10
2/10
TO MAIN(MICON)
AA
AB
CIRCUIT (10/10)
AC
AD
1/10
6/10
4/10
SA-AKX74PH/PN
10/10
8/10
7/10
9/10
MAIN(MICON) CIRCUIT
H
6
SCHEMATIC DIAGRAM - 14
MAIN(MICON) CIRCUIT
B
: +B SIGNAL LINE
: -B SIGNAL LINE
: CD AUDIO INPUT SIGNAL LINE
: AUX/TUNER/MUSIC PORT/MIC AUDIO INPUT SIGNAL LINE
: AUDIO OUTPUT SIGNAL LINE
: AM SIGNAL LINE
: FM SIGNAL LINE
: USB SIGNAL LINE
A
6
7
3
4
5
TO MAIN(MICON)
CIRCUIT (9/10)
C2107
R2224
0
R22250C2108
AB
AA
AC
TO MAIN(MICON)
CIRCUIT (5/10)
AD
B
R2048
33
C2200
Q2028
BUFFER AMP
Q2030
BUFFER AMP
25V220
R2434
4.7K
R2438
4.7K
R2244
R2241
4.7K
B1ABCF000176
B1ABCF000176
R2245
R2242
4.7K
27K
Q2029
BUFFER AMP
Q2032
BUFFER AMP
27K
R2238
R2239
1.8K
1.8K
C2165
0.056
C2168
C2169
0.15
C2166
0.056
6800P1M0.68
0.15
GND
15K
6800P1M0.68
R2259
C2184
R2254
R2255
C2183
675
C2182
R2257
C2180
0
C2280
0.056
R2435
1.8K
R2436
C2279
0.15
27K
B1ABCF000176
C2281
0.15
R2440
1.8K
C2282
0.056
0
B1ABCF000176
R2439
27K
15K
R2258
12K
10
C2181
24381
R2265 10K
R2256 12K
10K
C2185
R2264
V+
C2186
2.7KR2268
C2179 10
R2269
39K
R2266
6.8K
10
IC2001
C0ABBB000067
DUAL OP-AMP
R2267
6.8K
10
R2270
39K
R2272 2.7K
0.1C2189
16V220C2190
C2205
0.068
C2204
0.068
R2308
1.8K
R2291
4.7K
R2290
4.7K
R2305
1.8K
C2212
R2292
10K
R2293
10K
C2213
FR_R_WOOFER
R2320
0
18K
27K
R2321
18K
27K
0
CHANGE
(R2320,R2321)
FR_R_TWEETER
FR_L_TWEETER
FR_L_WOOFER
DA
DA
DA
DA
C
D
E
F
3/10 5/10
2/10
MI: MAIN(MICON): SCHEMATIC DIAGRAM - 5 ~ 14
DA: MAIN(D-AMP): SCHEMATIC DIAGRAM - 15 ~ 16
1/10
6/10
4/10
10/10
8/10
7/10
9/10
SA-AKX74PH/PN MAIN(MICON) CIRCUIT
57 58 59 60 61 62 63 64 65 66 67 68 69 70
7
G
H
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