Roland DD-20 Specifiche Scaricare il pdf (Pagina 22)

Mar.2003

DD-20(T)

BLOCK DIAGRAM

fig.block

INPUT B

OUTPUT B

PHONES

DC IN

+3.3V

+23V

+9V

+9V

JACK BOARD

PANEL BOARD

OUTPUT A

(MONO)

CTL

BATTERY

(JK IN/NO INPUT)

(JK IN/NO INPUT)

(JK IN/NO INPUT)

(JK IN/NO INPUT)

(JK IN/NO INPUT)

BUFFER

(INV)

IC1B

INPUT A

(MONO)

BUFFER

Q1

PRE EMPH/

LEVEL CTL

IC3B/IC18A

CODEC

AD/DA

IC6

PRE EMPH/

LEVEL CTL

IC3A/IC18B

DE EMPH/

LEVEL CTL

IC5A/IC18D

DE EMPH/

LEVEL CTL

IC5B/IC18C

FET SW

Q2

FET SW

Q3

FET SW

Q4

FET SW

Q6

FET SW

Q8

EEPROM

IC10

RESET

IC7

LOGIC

IC15B,C

TR

Q7

16 PIN

CN2

CN2

SDRAM

IC16

MIXER

IC4A

BUFFER

IC13A

BUFFER

IC13B

MIXER

IC4A

CPU

IC8

LOGIC

IC15A

TR

Q9

CN1

CN1

16PIN

LED1

ENC1LED6

LED2 - 5

LED9 -12

LED13-17

LED DRIVER

IC1

SW1-6

VR

1-4

LCD1

LCD DRIVER

IC2

CN31,CN41

CN3,CN4

DSP

IC9

DC-DC

CONVERTER

(STEP DOWN)

IC12,Q17

DC-DC

CONVERTER

(STEP UP)

IC11

RIPPLE

FILTER

Q15

CN3

RIBON

3P

CN5

CN4

BUFFER

Q5

BUFFER

(INV)

IC1A

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