Akai MPK261 Service Manual

1 1
2 2
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D D
C C B B
A A
Title
Number RevisionSize
A3
Date: 2014/2/13 Shee t of File: C:\Users\..\POWE R_IO-20130903.Sc hDoc Drawn By:
REV
Number of SheetsSheet Number
DRAWN_BY_1 Last SavedDate
File Name ASSEMBLY_NUM BER PART_NUMBER
TITLE_MAIN
Copyright
POWER & I/O
N/CN/C
N/C
MIDI IN
N/C
N/C
MIDI OUT
N/C
+3.3V
CURRENT LIMITER
VDP_SRC shall be able to source at least 250uA when D+ is between 0.5and 0.7. VDP_SRC shall notpullD+ below 2.2V whenD+ ispulled to [3.0-3.6]V through [900-1575]ohms
VDP_SRC = 0.6V
0.33Vref
Locate closeto USB input
Locate closeto USB input
CHARGING PO RT DETECTION
* Provide plentyof copper for heat sinking for case of over voltage adapter
For green/blue LEDs
Vo= Vref*(1+(RF/RG))
Vfb= 1.26V
Do Not Stuff
nominally4.0V
VLED_RGB
Power input is 6VDC
N/C
inve rt
USB CONNECT
forcesEXT_CHARGER low if CHECK_POWER low
TO TOP PCB RIGHT TO TOP PCB RIGHT
LCD CONTRAST
(VLED)
Hold CHECK_POWER Highto maintain EXT_CHARGER High
PSU DETECTION
Vbus DET ECTION
AKAI
ASSYNUMBER:
REVISION RECORD
APPROVED:ECO NO:LTR DATE:
123456
D C B A
C D B A
COMPANY: TITLE: PARTNUMBER: FILENAME: SCALE:
RELEASED: DRAWN: DATED:
DATED:
REV: SIZE:
SHEET: OF
C
OUT
1
IN
2
GND
3
NJU7223DL1-33
U1
1
TP2
0.1uF C4
1000pF
C14
1000pF
C12
220 ohmR18
1
2 3
MBT4401 Q2
220 ohm
R17
220 ohm
R16
10KR19
1000pF
C15
1000pF
C16
47 ohm R20
0.1uF C11
4.7uF,25V
C2
1
23
MBT4403 Q4
1K
R28
1K R30
1K R29
0.1uF C20
0.1uFC19
820K R31
0.1uF C54
1
TP1
0.1uF C18
0.1uF C1
100uF,10V
C3
10K R101
100 ohm
R102
0.1uF
C70
3 1 MMBD4148
D8
0.1uF
C163
0.1uF C171
1
TP17
100uF, 10V
C165
100uF, 10V
C181
10K R140
1.5K R21
1
23
MBT4403 Q11
10KR44
0.1uF
C72
100 ohm R124A 100 ohm R124B 100 ohm R124C 100 ohm R124D
100 ohm R125A 100 ohm R125B 100 ohm R125C 100 ohm
R125D
100 ohm R131A 100 ohm R131B 100 ohm R131C 100 ohm R131D
1 2
FBMA-1 1 -201209-601A20T
L3
0.1uF
C37
0.1uF
C55
100 ohm R130A 100 ohm R130B 100 ohm R130C 100 ohm R130D
1
23
MBT4403 Q5
0.1uF C28
0.1uF
C22
100 ohm R126A 100 ohm R126B 100 ohm R126C 100 ohm R126D
100 ohm
R129
100 ohm R127A 100 ohm R127B 100 ohm R127C 100 ohm R127D
100 ohm
R52
100 ohm
R51
100 ohm
R57
100 ohm
R65
100 ohm
R68
10KR22
1.00k 1%R69 2.15k 1%R70
PAD_RETURN3
+5VUNREG
ANAL OG0 ANAL OG1 ANAL OG2
PAD_RETURN0 PAD_RETURN1 PAD_RETURN2
GND_LED
ANAL OG3
DATA7 DATA6 DATA5 DATA4 DATA3 DATA2 DATA1 DATA0
LCD _CONTRAST_DC
DATA[0..7]
PAD_RETURN[0..3]
ANAL OG[0..3]
GNDGNDGND
GND GNDGND GND GNDGND
MIDI_TX
MIDI_RX
+3V3
+3V3
GNDGND GND
GND GND
GND
GND GND
+3V3
GND GND
USB-
USB+
GND
GND
GND
+3V3
GNDGND
CHECK_POW ER
+VLED_RGB
+3V3
GND
GND_LED
GND
GND
GND
+3V3
GND
+3V3
GND
EXT _PSU
EXT _CHARGERUSB_CONNECT
+3V3
GND
GND
GND
ANAL OG_TOP
+3V3
+5VUNREG
GNDGND
+3V3+3V3
LCD _CONTRAST
MOD_POT
PITCH_POT
ANAL OG_SEL E CT0 ANAL OG_SEL E CT1 ANAL OG_SEL E CT2 ANAL OG_SEL E CT3
PAD_SCAN0 PAD_SCAN1 PAD_SCAN2 PAD_SCAN3
+VLED_RGB
GND
+5VUNREG
LED_EN
BUTT ONS_IN
LEDS_OUT
SHIFT _CLK
LOAD_BUT TONS
LOAD_LEDS
LCD _E LCD _RW LCD _RS
BACKLIGHT _EN
EXT 0 EXT 1 EXT 2 EXT 3 EXT 4
+3V3
VBUS_SENSE
+3V3
DATA[0..7]
PAD_RETURN[0..3]
MBRS140LT3 D6
MBRS140LT3
D10
1 3
D5 12V
1
65
DS
G
FDC6306P
U3A
3
42
DS
G
FDC6306P U3B
1 2
3
BAW56 D13
1 2
3
BAW56 D4
VIN
1
ON/OFF
2
OUT
3
VADJ
4
5
GNDGND
OUT(TAB)
3
NJM2387
U59
1 2 3
4
U2 TLP181
1
2
3
4 5
6
7
8
J4 MIDI
1
2
3
45
6
7
8
J5
MIDI
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 18 17 19 20 21 22 23 24 25 26
J14
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 18 17 19 20 21 22 23 24 25 26 27 28 29 30
J16
BAV99
D11
BAV99
D3
+
3
-
2
1
U5A LM393
+
5
-
6
7
U5B
LM393
84
U5C LM393
1 3 2
J7 P6
+VBUS
1
D-
2
D+
3
4
4
56
J6
DNS 0 ohm
R1007
0 ohm R26 0 ohm R13
0 ohm R5
0 ohm R32
0 ohm R4
0 ohm R100
806 ohm 1% R135 475 ohm 1% R136
10k 1% R138 1.1k 1% R137
8.06k 1% R41
100k 1% R40
1 2
L1 10uH
1 2
L2 10uH
1uF C21
1uF
C177
1uF
C178
ANAL OG[0..3]
1
2
3 4
5
6
SW1
10k 1% R141
10k 1% R6
10k 1% R142
10k 1% R8 12k 1% R9

Akai MPK261 Specifications

General

MIDI-keyboard number of keys	61 keys
Interface	USB
USB version	2.0
USB ports quantity	1
Minimum RAM	1024 MB
Minimum processor	1.25GHz G4 & G5 / 1.5GHz Pentium 4 & Celeron
Windows operating systems supported	Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64

Weight and Dimensions

Depth	311 mm
Width	905 mm
Height	86 mm
Weight	6850 g