Page 1
1
23
A-209R, A-209
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
A
3.1 BLOCK DIAGRAM
4
CN101
CN102
2.8mV
PHONO
/50kΩ
TUNER
CD
200mV
/50kΩ
LINE
TAPE1
/CD-R
200mV
/1kΩ
200mV
/50kΩ
200mV
/1kΩ
/MD
REC
TAPE2
MONITOR
REC
B
IC151
RIAA
31
37dB
Q101
Q103
26
24
25
FUNCTION
27
24
24
D
AF ASSY
IC101
19
18
17
CN203
20
12 12
CN501
Q501
Q503
LOUDNESS
CN501
CN203
UP/DOWN
ON/OFF
VOLUME
M
VR501
1, 2
1, 2
Q337-Q340
F
Q331, Q327, Q328
C
D
D
FROM UNUSUAL
OUTPUT DETECTION
KEY INPUTS
S602, S603
S702–S704
E
FROM FUNCTION SEL
S601
604
G
FRONT R ASSY
23, 24,
36, 40,
µ-COM
42
IC601
32, 33
137
TO FUNCTION SW
2, 3, 438
DIRECT, LOUDNESS ON/OFF
12, 15
VOLUME UP/DOWN
30, 31
FUNC MUTE ON/OFF
17
TO PROTECTION RYSR INPUT
IC101
D
Q501–Q514
A
Q337–Q340
D
Q303
D
Q334, Q336
D
6
1234
Page 2
5
678
A-209R, A-209
A
A
VOLUME ASSY
DIRECT
ON/OFF
Q505
Q507 Q509
CN50276
J37
TONE
6
AND
BALANCE
IC751
VR751
VR752
VR601
F
CN501 CN203
6
7
E
FRONT L ASSY
D
AF ASSY
DIRECT ENERGY MOS
POWER AMP
WRLC
39dB
8
8
Q303
IC301
Q309–Q330
FUNC
MUTE
PROTECTION RY
UNUSUAL
OUTPUT
DETECTION
Q331, Q327, Q328
RY401
RY402
RY403
J551
J551
1
1
B
HEADPHONE ASSY
401
SP-A
SP-B
B
H.P
JA501
TO POWER STAGE
TO µ-COM
LED
TO VOLTAGE STAGE
5
TO OP AMP
RY
+BH
–BH
+BL
–BL
+ 6
IC453
IC451
IC452
Q451
REGULATOR
Q452
6
AF ASSY
+19
–15
D452–D455
D
D451
C
C
AC PRIMARY ASSY
S801 FU1T1
D
7
7
8
Page 3
1
23
A-209R, A-209
3.2 OVERALL CONNECTION DIAGRAM
A
4
B
HEADPHONE ASSY
AWX7114
B
AWX7124 (MYXJ, MVXJ)
AWX7121 (MLXJ, SBDXJ)
F
FRONT R ASSY
D
AWX7117 (MYXJ, MVXJ)
AWX7116 (MLXJ, SBDXJ)
AF ASSY
C
451
A
VOLUME ASSY
AWX7118 (MYXJ, MVXJ)
AWX7112 (MLXJ, SBDXJ)
D
8
1234
Page 4
5
678
A-209R, A-209
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PAR TS LIST" or "PCB PARTS LIST".
E
FRONT L ASSY
AWX7123 (MYXJ, MVXJ)
AWX7122 (MLXJ, SBDXJ)
A
G
OPT ASSY
AWX7125
(MYXJ, MVXJ)
POWER TRANSFORMER
ATS7190 : MYXJ, MVXJ, MLXJ
C
AC PRIMARY ASSY
AWX7113
(MYXJ, MVXJ, MLXJ)
AWX7670
(SBDXJ)
MYXJ, MVXJ,
MLXJ types
S2 : AKX-507
VOLTAGE
SELECTOR
SBDXJ type
A-209/SBDXJ
ADG1154 : MYXJ, MLXJ types
AC POWER CORD
ADG1156 : MVXJ type
ADG1154 (VKX1007) : SBDXJ type
(VKX1007)
B
C
POWER TRANSFORMER
ATS7191 : SBDXJ
5
D
9
6
7
8
Page 5
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23
A-209R, A-209
3.3 VOLUME and HEADPHONE ASSYS
A
B
HEADPHONE ASSY
AWX7114
B
D
4
J551A
: AUDIO SIGNAL ROUTE
VOLUME ASSY
A
AWX7118 (MYXJ, MVXJ)
AWX7112 (MLXJ, SBDXJ)
C
J3
E
ACX7038
VR-501 : ACX7038 (MYXJ, MVXJ)
VR-501 : ACS7035 (MLXJ, SBDXJ)
(MYXJ, MVXJ)
D
CN203
D
10
A
B
1234
Page 6
1
3.4 AC PRIMARY ASSY
• NOTE FOR FUSE REPLACEMENT
CAUTION -
C
SBDXJ type
234
A-209R, A-209
A
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE WITH SAME TYPE AND RATINGS ONLY.
AC PRIMARY ASSY
AWX7113 (MYXJ, MVXJ, MLXJ)
AWX7670 (SBDXJ)
MYXJ, MVXJ, MLXJ types
SBDXJ type
LIVE
TO POWER
TRANSFORMER
NEUTRAL
REK1023
T1.25AL250V
MYXJ,
MVXJ,
MLXJ types
POWER
S801
ASG1035
REK1023
T1.25AL250V
A-209/SBDXJ
TO S2
VOLTAGE
SELECTOR
TO
AC POWER
CORD
B
C
D
C
1
2
3
4
11
Page 7
A-209R, A-209
3.5 AF ASSY
A
1
1k
23
: AUDIO SIGNAL ROUTE
4
AF ASSY
D
AWX7117 (MYXJ, MVXJ)
AWX7116 (MLXJ, SBDXJ)
1k
C313,C337 :
B
C
MYXJ, MVXJ ONLY
IDLE ADJ.
(L CH)
C314,C338 :
IDLE ADJ.
(R CH)
D
MYXJ, MVXJ ONLY
CN501
A
12
D
1234
Page 8
5
IRF530(S)
678
A-209R, A-209
A
CAUTION : FOR CONTINUED PROTECTION AGAINST
RISK OF FIRE. REPLACE ONLY WITH
SAME TYPE NO. 491001 MFD, BY
LITTELFUSE INK. FOR IC454 (AEK7009).
ACH7080
C451
(6800/42)
ACH7081
C452
(6800/42)
B
IRF9530(S)
IRF530(S)
IRF9530(S)
Q333–Q336:
R361–R366:
C321–C324:
TO POWER
TRANSFORMER
C
F
5
CN601
D
J551
B
D
6
7
8
13
Page 9
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23
A-209R, A-209
3.6 FRON L, FRONT R and OPT ASSYS
4
A
B
G
OPT ASSY
AWX7125
(MYXJ, MVXJ)
E
FRONT L ASSY
AWX7123 (MYXJ, MVXJ)
AWX7122 (MLXJ, SBDXJ)
MYXJ, MVXJ ONLY
VSG1009
VSG1009
VSG1009
CN502
A
C
CN202
D
D
FRONT L ASSY
S702 : LOUDNESS
S703 : SPEAKER A
S704 : SPEAKER B
14
E
1234
GF
Page 10
MYXJ, MVXJ ONLY
5
678
A-209R, A-209
A
F
FRONT R ASSY
AWX7124 (MYXJ, MVXJ)
AWX7121 (MLXJ, SBDXJ)
MYXJ, MVXJ ONLY
MYXJ, MVXJ ONLY
VSG1009
VSG1009
INPUT
SELECTOR
B
C
FRONT R ASSY
S601 : INPUT SELECTOR
CD
TUNER
PHONE
LINE
TAPE1/CD-R/MD
S602 : DIRECT
S603 : TAPE2 MONITOR
5
D
F
6
7
8
15
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