Pioneer A-209-R Schematic

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

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

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