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Stereo System
SAAK18 - MINI HES W/CD-PLAYER
Service manual
Deck Circuit; Mechanism (Deck 2/1) Circuit - Panasonic SA-AK18 Service Manual
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:
Service manual
(120 pages)
,
Wiring diagrams
(40 pages)
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Operating instructions manual
(32 pages)
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SCHEMATIC DIAGRAM-12
DECK CIRCUIT
P.B
HEAD
1 MECA
CS1001
1
1
L
2
2
3
3
4
4
5
5
R
3
CS1002
2
R/P
HEAD
MECA
1
1
L
2
2
3
3
R
4
4
4
5
5
E HEAD
VCC
1
8.5V
<<11.3V>>
11
R1001
C1006
1
50V1
12
6
+
5
4
0V
Q1001
<<0V>>
0V
<<22.9V>>
0V
Q1003
0V
<<0V>>
<<0.2V>>
D1003
1SS355TE17
0V
<<0V>>
R1003
10K
C1001
0.01
Q1001
Q1003
2SC2784FTA
2SD2144STA
SWITCHING
SWITCHING
(BEAT PROOF)
(REC;ON)
: +B Line
-69.5dB
-69.5dB
C1012
C1015
1000P
1000P
C1019
100P
R1009
C1020
18K
470P
-69.5dB
L
-69.5dB
24
L
A
IC1004
BA7755A
R/P SELECT
R
IC1004
1
0V
<<1.3V>>
H=OFF
2
3
4
5
R
R1010
C1021
18K
470P
C1022
1000P
REC H
L1001
RLQB470JTD-D
C1014
14.2V
1000P
<<13.9V>>
0V
<<0.6V>>
1
Q1004
2
0V
C1018
3
<<0.4V>>
0V
L1002
7L1A62N
<<0.6V>>
Q1005
14.2V
C1010
<<14V>>
R1004
25V100
1.5K
<<0.6V>>
R1011
D1004
R1008
C1008
10K
UDZTE173R6B
22K
50V1
0V
0V
<<0V>>
<<4.8V>>
47K
R1006
Q1006
1K
0V
<<0V>>
Q1006
CrO2
DTC144TKA146
BIAS OSC CONTROL
(METAL/CR02)
: Playback Signal Line
R1055
C1038
2.2K
220P
R1017
8.2K
R1032
10K
C1034
C1044
R1015
50V3.3
10V33
47
C1032
0.018
C1036
C1043
0.033
50V4.7
23
22
21
20
19
18
17
16
15
-
R
P
+
ALC
P
NOR/Cro &
PB AMP (L)
R
HI/LO LOGIC
IC1001
R
PB AMP (R)
LOGIC
LOGIC
B
+
A/B
REC/PB
-
P
2
3
4
5
6
7
8
10
9
C1033
R1022
0.018
10K
R1028
8.2K
REC H
Q1004,Q1005
IC1001
R1014
2SD2144STA
AN7348STA-E1
R1012
4.7K
BIAS OSC
P.B EQ/REC AMP/
4.7K
(PLAY;ON)
ALC/TPS AMP
Q1008~Q1011
Q1007
KTC3875GRTA
0.01
KTC3875GRTA
INTERFACE
BIAS OSC CONTROL
R1013
4.7K
C1026
6.3V47
0V
<<0.7V>>
0V
Q1009
0.6V
0.5V
0V
0V
<<0V>>
0V
Q1007
0.6V
R1027
100K
0V
Q1008
R1024
R1020
56K
47
4
1 2
3
5
6
7
CP1002
CS971
1 2
3
4
5
6
7
IC971
ON2180RLC1
PHOTO INTERRUPTER
R973
39K
MECHANISM (DECK 2)
CIRCUIT
55
: Record Signal Line
Q1020
R1098
R1094
Q1020,Q1021
47K
KTD1304TA
0V
FILTER AMP
<<0V>>
0V <<0V>>
R1096
100K
-44dB
R1093
R1039
15K
0V
<<0V>>
R1038
R1084
0V
4.7K
2.2K
<<0V>>
R1090
330
0.7V
<<0.7V>>
C1046
R1047
10V220
0V
1K
<<0V>>
15V
<<14.8V>>
R1048
Q1012
14
13
1K
R1086
0V
2.2K
<<0V>>
RIPPLE
REJECTION
0.7V
<<0.7V>>
11
12
0V
<<0V>>
Q1013
R1035
10K
Q1012,Q1013
KTD1304TA
MUTING
MECHAGND
MECHAGND
R1037
0.7V
Q1011
100K
0.2V
0.1V
0.1V
0.2V
Q1010
R1040
R1036
47
56K
8 9
1 2
3
4
5
6
7
8 9
8 9
1 2
3
4
5
6
7
8 9
1
STBY_5V
2
AD_OUT
RECINH_F
3
4
MODE
5
RECINH_R
6
HALF
7
VREF_GND
Z791
EXBF7L355SYV
IC951
ON2180RLC1
PHOTO INTERRUPTER
MECHANISM (DECK 1)
CIRCUIT
SA-AK18
276mV / CLA
R1091
1K
2.2K
0.7V
<<0.7V>>
R1092
2.2K
Q1021
1K
5V
R1049
<<5V
1M
C1048
50V1
0.2V
<<0.2V>>
0V
<<0V>>
C1049
1000P
Q1014
R1050
1M
C1047
1.3V
50V1
<<1.3V>>
R1046
100K
C1050
R1052
1000P
220
-44dB
R1057
2.2K
Q1014,Q1015
2SC2412KT96
BUFFER AMP
Q10
Q1017
2SD965
MOTOR DR
CP1001
CS951
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