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1
6
MIDI OUT
A
R102
MIDI_TX
J5
100 ohm
MIDI
5
D
3
+3V3
N/C
D11
C16
BAV99
1000pF
GND
GND
GND
B
C
Power input is 6VDC
SW1
6
5
L1
J7
1
1
2
4
10uH
2
3
N/C
3
C177
C178
2
1uF
1uF
1
P6
L2
1
2
10uH
GND
B
R4
0 ohm
GND
C
CHECK_POWER
USB_CONNECT
USB CONNECT
J6
1
+VBUS
2
D-
A
3
D+
4
4
GND
D
R100
0 ohm
R101
C1
10K
0.1uF
GND
GND
GND
1
2
3
5
4
MIDI IN
R18
220 ohm
+3V3
+3V3
N/C
J4
D3
MIDI
BAV99
R20
4
5
U2
1
4
47 ohm
1
3
N/C
N/C
N/C
4
2
3
1
N/C
TLP181
C15
C12
C14
R16
R17
C11
1000pF
1000pF
1000pF
220 ohm
220 ohm
0.1uF
GND
GND
GND
GND
GND
+3V3
PSU DETECTION
R9
12k 1%
+3V3
invert
U5A
D13
1
2
-
3
1
R6
EXT_PSU
2
3
+
10k 1%
BAW56
LM393
R142
R8
10k 1%
10k 1%
R141
10k 1%
GND
GND
Vbus DETECTION
+3V3
D4
1
R22
10K
3
2
VBUS_SENSE
BAW56
D6
MBRS140LT3
R140
U3A
FDC6306P
10K
5
6
S
D
GND
U3B
FDC6306P
D10
2
4
S
D
MBRS140LT3
C21
R28
R30
1uF
1K
1K
D5
12V
R29
Q4
C19
0.1uF
1
MBT4403
1K
CURRENT LIMITER
C20
R31
0.1uF
820K
forces EXT_CHARGER low
GND
GND
if CHECK_POWER low
R44
R135
R138
806 ohm 1%
10k 1%
Locate close to USB input
D8
0.33V ref
3
1
MMBD4148
R136
R137
475 ohm 1%
1.1k 1%
R21
1.5K
GND
GND
VDP_SRC shall be able to source at least 250uA when D+ is between 0.5 and 0.7.
VDP_SRC shall not pull D+ below 2.2V when D+ is pulled to [3.0-3.6]V through [900-1575]ohms
2
3
4
3
R19
10K
MIDI_RX
1
Q2
MBT4401
C54
0.1uF
GND
GND
U59
NJM2387
1
3
VIN
OUT
3
OUT(TAB)
R70
2.15k 1%
2
ON/OFF
C181
C163
4
VADJ
GND
GND
R69
1.00k 1%
100uF, 10V
0.1uF
GND_LED
Vo = Vref*(1+(RF/RG))
Vfb = 1.26V
For green/blue LEDs
GND_LED
* Provide plenty of copper for heat sinking for case of over voltage adapter
+3.3V
+5VUNREG
U1
NJU7223DL1-33
TP1
R5
2
1
IN
OUT
0 ohm
C2
C3
C18
C4
0.1uF
4.7uF,25V
100uF,10V
0.1uF
TP2
GND
GND
GND
GND
GND
1
LCD_CONTRAST
+3V3
Q11
10K
1
MBT4403
Hold CHECK_POWER High to
maintain EXT_CHARGER High
U5B
6
-
7
EXT_CHARGER
5
+
LM393
Locate close to USB input
R32
0 ohm
+3V3
USB-
USB+
CHARGING PORT DETECTION
U5C
LM393
C70
0.1uF
GND
DRAWN:
DRAWN_BY_1
RELEASED:
4
5
2
REVISION RECORD
LTR
ECO NO:
VLED_RGB
nominally 4.0V
+3V3
+VLED_RGB
Do Not Stuff
TP17
R26
R1007
DNS 0 ohm
0 ohm
C171
C165
0.1uF
100uF, 10V
R13
0 ohm
GND
+5VUNREG
+VLED_RGB
ANALOG_TOP
+3V3
C72
FBMA-11-201209-601A20T
0.1uF
C55
C37
C22
GND
0.1uF
0.1uF
0.1uF
GND
GND
GND
(VLED)
PITCH_POT
MOD_POT
+3V3
100 ohm
R130A
ANALOG_SELECT0
ANALOG[0..3]
100 ohm
R130B
ANALOG_SELECT1
100 ohm
R130C
ANALOG_SELECT2
100 ohm
R130D
ANALOG_SELECT3
ANALOG0
ANALOG1
ANALOG2
ANALOG3
ANALOG[0..3]
100 ohm
R131B
PAD_SCAN0
100 ohm
R131A
PAD_SCAN1
PAD_RETURN[0..3]
100 ohm
R131C
PAD_SCAN2
100 ohm
R131D
PAD_SCAN3
PAD_RETURN0
PAD_RETURN1
PAD_RETURN2
PAD_RETURN3
PAD_RETURN[0..3]
DATA[0..7]
DATA[0..7]
LCD CONTRAST
DATA0
100 ohm
R124A
DATA1
100 ohm
R124B
+3V3
+3V3
DATA2
100 ohm
R124C
DATA3
100 ohm
R124D
100 ohm
R125C
DATA4
DATA5
100 ohm
R125D
DATA6
100 ohm
R125A
DATA7
100 ohm
R125B
C28
100 ohm
R51
EXT0
Q5
R40
100 ohm
R57
EXT1
100k 1%
MBT4403
0.1uF
100 ohm
R65
EXT2
100 ohm
R68
EXT3
100 ohm
R129
EXT4
100 ohm
R127A
LOAD_BUTTONS
R41
100 ohm
R127B
LOAD_LEDS
8.06k 1%
100 ohm
R127C
SHIFT_CLK
BUTTONS_IN
100 ohm
R127D
LEDS_OUT
100 ohm
R52
LED_EN
100 ohm
R126A
BACKLIGHT_EN
100 ohm
R126B
LCD_E
100 ohm
R126C
LCD_RW
100 ohm
R126D
LCD_RS
LCD_CONTRAST_DC
Copyright
COMPANY:
AKAI
TITLE:
TITLE_MAIN
POWER & I/O
PART NUMBER:
PART_NUMBER
ASSY NUMBER:
ASSEMBLY_NUMBER
DATED:
Last Saved Date
FILENAME:
File Name
DATED:
Title
SCALE:
Size
Number
A3
Date:
2014/2/12
File:
D:\RD22\..\POWER_IO-20130903.SchDocDrawn By:
5
6
1
APPROVED:
DATE:
A
D
B
L3
C
J16
1
2
3
4
5
6
7
8
9
10
11
12
13
TO
14
15
16
TOP
17
18
19
RIGHT
20
21
22
PCB
23
24
25
26
27
28
29
30
GND
J14
1
B
2
3
4
C
5
6
7
8
9
TO
10
11
12
TOP
13
14
15
RIGHT
16
17
18
PCB
19
20
21
22
23
24
25
26
GND
A
D
REV:
REV
SIZE:
C
SHEET:
Sheet Number
OF
Number of Sheets
Revision
Sheet of
6
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