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MA-373 (Hi-Fi AUDIO) SCHEMATIC DIAGRAM • See page 4-5 for printed wiring board.
– Ref. No.: MA-373 board; 1,000 series –
1
2
3
MA-373 BOARD (5/9)
A
B
EXCEPT SE350/SE500
AUDIOCH2
AUDIOREC
5
C
MA-373 BOARD (1/9)
AUDIOCH1
(SEE PAGE 4-10)
ANGND
AFENV
R302
18k
JL300
AFSWP
R301
JL301
10k
AFRECP
JL302
D
14
IICDAT
JL303
MA-373 BOARD (4/9)
IICCLK
(SEE PAGE 4-17)
R322
0
JL304
AFENV
JL325
AMUTE
DEC/VTR
E
F
AN_GND
18
C+12V
MA-373 BOARD (9/9)
SW5V
(SEE PAGE 4-30)
B+
TUNER_M
19
TUNER_L
G
MA-373 BOARD (6/9)
TUNER_R
(SEE PAGE 4-23)
MOD_AUDIO
JL326
R580
*
R581
4700
SE350/SE500
*R580
H
0
:EXCEPT SE350/SE500
1k
:SE350/SE500
I
J
K
B+
05
L
4
5
6
7
C308
C309
10u
8200p
50V
R307
C311
2200
10u
50V
C310
47u
R306
16V
27k
3.9
3.9
3.9
0.8
3.9
33
32
31
30
29
C304
0.01u
B+
11.7
Vcc 12V
R4.3/
JL322
P0.7
PB IN2
R4.3/
JL323
P0.7
REC OUT
C323
R4.3/
0.1u
JL324
P0.7
PB IN1
C324
0.01u
4.2
IC301
HM SW
R329
470
Vss D
Hi-Fi AUDIO PROCESSOR
C303
0.1u
B+
5
Vcc 5V
TDA9605H/N2,518
R0.8/P4-4.4
AF SWP
R304
1k
5
SDA
4.9
SCL
R305
R0.1/P3.5
1k
AF ENV
C306
47u
16V
C307
1
2
3
4
5
47u
16V
3.8
3.8
3.8
3.8
3.8
L301
JS301
100uH
B+
B+
SE800/
SX800
EXCEPT SE500K
JS580
0
SE500K
C580
C583
C581
C582
10u
10u
10u
10u
50V
50V
50V
50V
Q580-582
SWITCH
R585
100k
Q580
PDTC144EK-115
8
7
6
5
4
3
0
R582
*
10k
Q581
PDTC144EK-115
0.1
R583
*
10k
Q582
PDTC144EK-115
0.1
9
10
11
12
13
14
*
R584
B+
10k
4-21
SLV-SE350/SE500/SE600/SE650/SE700/SE800/SX600/SX700/SX800
8
9
10
11
C315
8200p
C316
10u
50V
C313
R311
C312
10u
2200
2.2u
50V
50V
C314
47u
R312
16V
27k
3.8
0.8
3.9
3.9
3.8
28
27
26
25
24
23
C317
0.22u
16V
3.8
NA IN
4.6
JS304
NA OUT
C318
10u
6.1
50V
L2 OUT R
6.1
L2 OUT L
R315
0
220
MUTE
6.1
JS308
L1 OUT R
C319
SE350/SE500
0
6.1
10u
IC301
50V
L1 OUT L
C320
10u
R316
0
50V
220
MUTE
C336
MUTE
10u
3.8
50V
RF OUT
0
ALC
C322
R313
10u
3.3M
50V
6
7
8
9
10
11
3.8
3.8
3.8
3.8
SE350/SE500
EXCEPT SE350/SE500/
SE600:A,N/SE700R
SE350/SE500
JS302
0
JS581
EXCEPT SE500K
0
C585
10u
50V
C586
10u
50V
IC580
R587
100k
R593
C+ SWITCH
100k
2
1
Q583
SWITCH
R595
2200
15
16
*
C587
10u
50V
*
11.7
0
-0.4
Q590
2PD601AR-115
R594
R596
10k
15k
MUTE
L580
100uH
EXCEPT
SE350/SE500
B+
12
13
14
JL310
NORMAL_AU_OUT
JL311
NORMAL_L3
8
NORMAL_L1
MA-373 BOARD (2/9)
(SEE PAGE 4-11)
NORMAL_L2
A_SW_CTL2
A_SW_CTL1
SE350/SE500
EXCEPT SE350/SE500/SE600:A,N/SE700:G,I,R/SE800G
C338
10u
50V
JL312
E2_AU(R)OUT
JL313
E2_AU(L)OUT
C337
JL314
10u
50V
L1_AU(R)OUT
JL315
20
E2_AU(R)IN
JL316
E2_AU(L)IN
MA-373 BOARD (7/9)
JL317
(SEE PAGE 4-25)
L1_AU(R)IN
JL318
L1_AU(L)IN
JL319
FRONT_AU(R)IN
JL320
FRONT_AU(L)IN
JL321
L1_AU(L)OUT
EXCEPT SE350/SE500R/SE600:A,N/SE700:G,I,R/SE800G
NO MARK:REC/PB MODE
R:REC MODE
P:PB MODE
*:IMPOSSIBLE TO MEASURE THE
VOLTAGE AT THE MARKED POINTS.
SIGNAL PATH
EXCEPT
SE350/SE500
AUDIO
Q592
2PB709AR-115
SIGNAL
Q591
R592
MUTE CONTROL
2PD601AR-115
1k
MUTE
-0.2
0
REC
0
R590
-0.1
1k
PB
D591
-0.3
JS590
1SS355TE-17
0
D590
1SS355TE-17
R591
SE350/SE500
1k
JS591
0
4-22
15
Hi-Fi AUDIO
MA-373 (5/9)
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