Akai MPD232 Service Manual

1 1
2 2
3 3
4 4
5 5
6 6
D D
C C B B
A A
9-40-0720-2
9-40-0720-2-0
DRAWN_BY_1
LCD CONTRAST
TO LCD
Vdd Vss VO RS R/W DB0 E DB1 DB2 DB3 DB5 DB4 DB6 DB7 Vee ANODE
LCD, IO
35mA current source f or LCD backlight
3mA tr ickle c urrent
when main s upply is off
TO PAD PCB
LCD CONTRAST
MIDI OUT
MIDI IN
N/C
COMPONENTS ON THIS SHEET SHOULD BE ON TOP RIGHT PCB
SHIFT_LEDS LOAD_LEDS LED_ENABLE PADS_LEDS_OUT VLED_RGB GND_LED PAD_SC AN0 PAD_SC AN1 PAD_SC AN2 PAD_SC AN3 PAD_RETURN2 PAD_RETURN3 PAD_RETURN1 PAD_RETURN0 +3v3 VLED_RGB GND_LED GND_LED GND_LED VLED_RGB VLED_RGB VLED_RGB VLED_RGB
3mA tr ickle c urrent Do Not Stuff
VLED GND GND VLED GND GND
SW_TAP T EMPO SW_NOTE REPEAT
SW_STOP
SW_PLAY
SW_PAD BANK B SW_PAD BANK A LED_TAP TEMPO
LED_NOTE REPEAT
LED_PAD BANK A LED_PAD BANK B SW_RECORD
SW_16 LEVELS
SW_FULL LEVEL SW_SEQ REC SW_PAD BANK D
SW_PAD BANK C
LED_SEQ REC
LED_PAD BANK C LED_PAD BANK D LED_FULL LEVEL
LED_16 LEVELS
Copyright (c) 2014 Akai Professional
AD33TP202F.PrjPcb
2014/12/1
AKAI
C
7 7
OFSHEET:
SIZE:
DATED: DATED:DRAWN:
RELEASED:
SCALE: FILENAME: PART NUMBER: TITLE: COMPANY:
A B D C
A B C D
6 5 4 3 2 1
ASSY NUMBER:
DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0
DATA[0..7]
+3V3
GND
GNDGND
+3V3
GND
GND
+5VUNREG
LED_ENABLE
LOAD _ LEDS
SHIFT_LEDS
PADS_ LEDS_ OUT
GND
+3V3
BACKLIGH T_EN
LCD_ E
LCD_ RW
LCD_ RS
+3V3+3V3
LCD_ CONTRAST
PAD_SCAN0 PAD_SCAN1 PAD_SCAN2 PAD_SCAN3
PAD_RETURN0 PAD_RETURN1 PAD_RETURN2 PAD_RETURN3
+3V3
GND
GND
MIDI_TX
GND
GND
GND GNDGND
+3V3
MIDI_RX
LED_SEQ_REC
LED_NOTE_REPEAT
LED_16 _LEVELS
LED_FULL_ LEVEL LED_TAP_TEMPO
LED_PAD_BANK_A LED_PAD_BANK_B LED_PAD_BANK_C LED_PAD_BANK_D
GND_LED
SW_STOP
SW_PLAY
SW_RECORD
SW_SEQREC
SW_PADBANKA SW_PADBANKB SW_PADBANKC SW_PADBANKD
SW_N OTEREPEAT
SW_TAPTEMPO
SW_1 6LEVELS
SW_FULL
+3V3+VLED_RGB+VLED
GNDGND_LED
+5VUNREG
GND
GND
GND
C10 3 10 00 pF
C10 4 10 00 pF
R16 8 2 20 ohm
Q6 MBT440 1
R16 9 22 0 ohm
R17 0 22 0 ohm
R17 1 10K
1
2
3
D2 BAV99
C10 7 0.1 uF
R17 2 1 00 ohm
C10 5 10 00 pF
C10 6 10 00 pF
R16 7 47 ohm
R17 3 4 7 ohm
5 6
U22C
74 AHC04
13 12
U22F
74 AHC04
1 2
U22A
74 AHC04
3 4
U22B
74 AHC04
147
GND VCC
U22G 74 AHC04
C95 0.1 uF
Q5 MBT440 3
R15 4 8.0 6K 1%
R15 5 10 0K 1%
C10 1 0.1 uF
R24 3 4.7 5K 1%
C93 0.1 uF
Q13 MBT440 3
D21 SMAJ 10 A
C94 0.0 1uF
Q11 MBT440 1
R23 8 10 K
Q12
MBT440 3
R23 9 10 K
R24 0
10 K
R24 1 68 0 ohm
C92 0.0 1uF
1 2
3
D3 BAV99
R23 4
10 K
R23 6 4 70 ohm
Q1 MBT440 3
Q14 MBT440 1
R23 7 10 K
R23 5
15 .0 ohm 1%
C89 0.0 1uF
C90 0.1 uF
Q10 MBT440 3
L7 1k @ 100M Hz
R10 01DNS_ 680 ohm
C91 10 00 pF
C80 10 uF
C20 10 uF
C19 10 uF
DATA[0..7]
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
J1
SEN2 TLP18 1
3 3 1 2
J2
3 3 1 2
J3
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
J19
AD33 Top Panel

Akai MPD232 Specifications

General

MIDI out	Yes
USB version	2.0
USB connector type	USB Type-B
USB ports quantity	1
Product color	Black
Number of drum pads	16
Number of mixer channels	8 channels
Current	1 A
Input voltage	6 V
Power supply type	USB
AC adapter included	No
Minimum RAM	1 GB
Minimum processor speed	1.25 GHz

Weight and Dimensions

Depth	254 mm
Width	422 mm
Height	48 mm
Weight	1900 g