Akai SynthStation 25 - Page 12

6/25/2010

9-79-0564-B-0

9-40-0564-B

AD03MNA00B.sch

ASSY NUMBER:

1

2

3

4

5

6

D

C

B

A

C

D

B

A

COMPANY:

TITLE:

PART NUMBER:

FILENAME:

SCALE:

RELEASED:

DRAWN:

DATED:

DATED:

SIZE:

SHEET:

OF

2

2

C

AD03 MAIN PCB

AKAI

DRM

BUFFER GAIN = 1

MAIN RIGHT

MAIN LEFT

MUTE CONTROL

HEADPHONE DRIVERS

PHONES

MAX SIGNAL FROM iPod

0.9Vrms = 2.55Vpp

Gain = 2.49

(+9.24dBu)

BUFFER GAIN = 1

MAX OUTPUT = 6.35Vpp

LEFT

RIGHT

+4VA

STUFF R134 TO ENABLE AUDIO

POWER RAILS ON STARTUP

-4VA

+4V and -4V Audio Rails will not

become active until AUDIO_RAIL_EN

is pulled high by STM32 Microcontroller.

DNS

DNS

R17

1.15k 1%

C6

1000pF

R13

1.15k 1%

C2

1000pF

Q4

2SD2114K

R10

3.3K

Q8

2SD2114K

1

2

3

Q7

MBT4403

1

2

3

Q3

MBT4403

R1

10k 1%

R15

10k 1%

L2

BLM21BB121SN1

L4

BLM21BB121SN1

3

+

2

-

1

U3-A

TS974

5

+

6

-

7

U3-B

TS974

R9

BLM21BB121SN1

R11

BLM21BB121SN1

1

2

S1

1

2

S3

R12

3.3K

R2

100k

R8

100k

1

2

3

Q14

MBT4403

D1

MMBD4148

D2

MMBD4148

C18

10uF 25V

Q10

MBT4401

R40

10k 1%

R20

62 ohm

R21

62 ohm

R18

62 ohm

R19

62 ohm

Q2

2SD2114K

1

2

3

Q6

MBT4403

R14

10k 1%

Q1

2SD2114K

1

2

3

Q5

MBT4403

R7

10k 1%

3

+

2

-

1

U1-A

MC33204

5

+

6

-

7

U1-B

MC33204

10

+

9

-

8

U1-C

MC33204

12

+

13

-

14

U1-D

MC33204

R30

47K

C19

47uF,16V

R38

47K

R39

100k

R31

100k

R5

3.3K

R3

3.3K

R6

100k

R4

100k

L1

BLM21BB121SN1

L3

BLM21BB121SN1

C1

150pF

C3

150pF

1

2

S4

1

2

S2

-v

+v

4

11

U3-E

TS974

10

+

9

-

8

U3-C

TS974

12

+

13

-

14

U3-D

TS974

R22

10k 1%

R23

10k 1%

R33

24.9k 1%

R25

10k 1%

R27

24.9k 1%

R26

10k 1%

R24

24.9k 1%

R16

100 ohm 1%

R42

24.9k 1%

C10

330pF

C5

330pF

C8

330pF

C4

22uF,16V

C7

22uF,16V

-v

+v

4

11

U1-E

MC33204

C16

0.1uF

C20

0.1uF

C11

0.1uF

C9

0.1uF

C12

22uF,16V

C13

22uF,16V

R49

10k 1%

R47

10k 1%

R50

10k 1%

R48

10k 1%

Q11

MBT4401

R41

10K

CW

1

2

3

P1-A

CW

4

5

6

P1-B

C17

0.1uF

C14

0.1uF

R44

10k 1%

R45

24.3k 1%

1

OUT

2

IN

3

CFLY-

4

GND

5

CFLY+

U5

TPS60403

1

OUT

2

IN

3

CFLY-

4

GND

5

CFLY+

U4

TPS60403

C25

1uF

C26

1uF

C15

1uF

C23

47uF,16V

Q9

MBT4401

R34

10K

R35

10K

1

2

3

Q12

MBT4403

R32

100k

R28

1M

R29

10K

R43

10K

C56

1uF

C57

47uF,16V

2

4

3

1

J1

PJ-314

J2

J6

1

VIN

3

SD

5

VOUT

4

ADJ

2

G

U2

DRM_AP6256A_SOT-25_PKG-A

C58

1uF

C60

1uF

+VRAW

+VRAW

-4VA

-4VA

+VRAW

+VRAW

+VRAW

+VRAW

-4VA

IPOD_OUT_L

IPOD_OUT_R

IPOD_RETURN

-4VA

MUTE

MUTE

MUTE

MUTE

+4VA

-4VA

MUTE_CONTROL

AUDIO_RAIL_EN

-4VA

+4VA

+VRAW
