Akai MPK249 Service Manual

1 1
2 2
3 3
4 4
5 5
6 6
D D
C C B B
A A
RIGHT - LEDs
SOFTKEY 1 SOFTKEY 2 SOFTKEY 3 SOFTKEY 4 SOFTKEY 5 SOFTKEY 6 SOFTKEY 7 SOFTKEY 8 OCTAVE UP OCTAVE DOWN TIME DIVISION CONTROL BANK C CONTROL BANK B CONTROL BANK A PROGRAM CHANGE GLOBAL EDIT PRESET
35mA current source for LCD backlight
A K
3mA trickle current
when main supply is off
3mA trickle current
TO MAIN PCB
Pin o rder reversed vs. main board connector.
LCD CONTRAST
TO LCD
Vdd Vss VO RS R/W DB0 E DB1 DB2 DB3 DB5 DB4 DB6 DB7 Vee
NC
Do Not Stuff
Th is sheet on RIGHT PCB
TO PADS PCB
Copyright (c) 2013 Akai Professional
LEDS-20130828.SchDoc
AKAI
C
2 3
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:
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
GND
8
SDO
9
SCLR
10
SCLK
11
RCLK
12
OE
13
SER
14
Q0
15
VCC
16
U60
74HC595
R442
47 ohm
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
GND
8
SDO
9
SCLR
10
SCLK
11
RCLK
12
OE
13
SER
14
Q0
15
VCC
16
U62
74HC595
R451
47 ohm
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
GND
8
SDO
9
SCLR
10
SCLK
11
RCLK
12
OE
13
SER
14
Q0
15
VCC
16
U63
74HC595
C7
0.1uF
C8
0.1uF
C9
0.1uF
C3
10uF
R1 47 ohm
R204A
47 ohm
R204B
47 ohm
R204C
47 ohm
R204D
47 ohm
R205A
47 ohm
R205B
47 ohm
R205C
47 ohm
R205D
47 ohm
LED56 AMBER LED57 AMBER LED58 AMBER LED59 AMBER LED60 AMBER LED61 AMBER LED62 AMBER LED63 AMBER
R206A
47 ohm
R206B
47 ohm
R206C
47 ohm
R206D
47 ohm
R207A47 ohm
R207B
47 ohm
R207C
47 ohm
R207D
47 ohm
LED64 AMBER LED65 AMBER LED66 AMBER LED67 AMBER LED68 AMBER LED69 AMBER LED70 AMBER LED71 AMBER LED72 AMBER LED73 AMBER
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
J4 GFP-231221-22602G
R234 10K
R235
15.0 ohm 1%
470 ohm
R236
C89
0.01uF
C90
0.1uF
Q1
MBT4403
Q10
MBT4403
Q14
MBT4401
R237 10K
C91 1000pF
L7
1K @ 100MHz
1 2
J13
Q11 MBT4401
R238 10K
Q12
MBT4403
R239 10K
R240
10K
R241
680 ohm
C1
0.01uF
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
J18
GFP-231221-22602G
R243
4.75K 1%
C93 0.1uF
Q13
MBT4403
D21 SMAJ10A
C94
0.01uF
TP1
1
2
3
D3 BAV99
5 6
U22C
74AHC04
3 4
U22B
74AHC04
1 2
U22A
74AHC04
13 12
U22F
74AHC04
147
GND VCC
U22G
74AHC04
C95
0.1uF
R19 47 ohm R20 47 ohm
LCD _CONTRAST_DC
ARP_LED LAT CH_LED
LCD _RS BACKLIGHT LCD _RW LCD _E DATA7
DATA7
DATA6
DATA6
DATA5
DATA5
DATA4
DATA4
DATA3
DATA3
DATA2
DATA2
DATA1
DATA1
DATA0
DATA0
LEDS64 LEDS65 LEDS66 LEDS67 LEDS68 LEDS69 LEDS70 LEDS71
LEDS72 LEDS73
LEDS56 LEDS57 LEDS58 LEDS59 LEDS60 LEDS61 LEDS62 LEDS63
DATA[0..7]
+VLED
GND_LED GND_LED GND_LED
LOAD_LEDS SHIFT _LEDS
LOAD_LEDS SHIFT _LEDS LOAD_LEDS SHIFT _LEDS
LED_ENABLE LED_ENABLE
LED_ENABLE
+VLED +VLED
GND_LED
+VLED
GND_LED GND_LED
GND_LED
LEDS_OUT
PAD_LEDS
PAD_RETURN0 PAD_RETURN1 PAD_RETURN2 PAD_RETURN3
+3V3
GND GND
GND
+5VUNREG
GND
GND
+3V3
GND
GNDGND
+5VUNREG
LED_ENABLE
BUTT ONS_IN
LEDS_OUT
SHIFT _CLK
LOAD_BUT TONS
LOAD_LEDS
EXT 0 EXT 1 EXT 2 EXT 3 EXT 4
PAD_SCAN2 PAD_SCAN1 PAD_SCAN3 PAD_SCAN0
+VLED
+3V3
+VLED_RGB
PAD_LEDS
SHIFT _LEDS LOAD_LEDS
LEFT_BUTT ONS
SHIFT _BUT TONS LOAD_BUT TONS
LED_ENABLE
GND +3V3
GND_LED
GND
MOD_POT
PITCH_POT
9-40-0688-2
9-79-0688-2-0
R.Edmonds
AD4A Top Panel PC B S
2013/8/28
ANAL OG_TOP
R1001680 ohm_DNS
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
J19

Akai MPK249 Specifications

General

Mixer section	-
Product color	Black
Backlight buttons	Yes
Display type	LCD
USB version	2.0
USB ports quantity	1
Power supply type	USB
Minimum RAM	1 GB
Minimum processor	Pentium 4/Celeron compatible CPU
Minimum processor speed	1.5 GHz
Mac operating systems supported	Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks
Windows operating systems supported	Windows 7 Home Basic, Windows 8, Windows Vista Business, Windows XP Home
Bundled software	Ableton Live Lite, Hybrid 3 by AIR Music Tech, SONiVOX Twist 2.0, and Akai Pro MPC Essentials

Weight and Dimensions

Depth	85.8 mm
Width	736.6 mm
Height	311.15 mm
Weight	5715 g