1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
Title
Number RevisionSize
A3
Date: 2014/4/25 Sheet of
File: D:\RD22\..\IO-20130911.SchDoc Drawn By:
PART_NUMBER
ASSEMBLY_NUMBER
DRAWN_BY_1
35mA current source for LCD backlight
TO
MAIN
PCB
Pin order reversed vs. main board connector.
N/C
N/C
N/C
TO
MAIN
PCB
Pin o rder reversed vs. main board co nnector.
LCD CONTRAST
TO LCD
Vdd
Vss
VO
RS
R/W
DB0
E
DB1
DB2
DB3
DB5
DB4
DB6
DB7
Vee
NC
board
RIGHT PCB - LCD, IO
N/C N/C
FOR
MOUNTING
HOLES
TO
PAD
PCB
COMPONENTS ON THIS SHEET SHOULD BE ON RIGHT PCB
35mA current source for LCD backlight
A
K
3mA trickle current
when main supply is off
3mA trickle current
Do Not Stuff
Copyright (c) 2013 Aka i Professional
#NAME?
#NAME?
AKAI
#NAME?
* *
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:
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
VI-FPC10 NSR-30-4-L
J17
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
GFP-23 1221 -126 02G
J18
4.75k 1%
R243
0.1uF
C93
0.01uF
C94
0.1uF
C95
TP1
10uF
C79
10uF
C78
10uF
C77
10uF
C76
10uF
C75
TP3 TP2 TP5
TP6
TP9
TP7
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
BL109-14RU
J3
10uF
C19
10uF
C20
10k
R234
15.0 ohm 1%
R235
470 ohmR236
0.01uF
C89
0.1uF
C90
10k
R237
1000pF
C91
10k
R238
10k
R239
10k
R240
680 ohm
R241
DNS_680 ohm R1001
0.01uF
C92
+3V3
BACKLIGHT
PAD_RET URN3
LCD_CONT RAST_DC
LCD_RS
+5VUNREG
LCD_RW
PAD_RET URN0
PAD_RET URN1
PAD_RET URN2
LCD_E
DATA7
DATA7
DATA6
DATA6
DATA5
DATA5
DATA4
DATA4
DATA3
DATA3
DATA2
DATA2
DATA1
DATA1
DATA0
DATA0
PAD_SCAN1
PAD_SCAN0
DATA[0..7]
+5VUNREG
PAD_SCAN2
GND_LED
GND
+3V3
GND
GNDGND
GND
+3V3
PAD_SCAN3
ANAL OG 1
ANAL OG 0
ANAL OG_TOP
+3V3
PITCH_POT
MOD_POT
ANAL OG_SEL ECT0
ANAL OG_SEL ECT1
ANAL OG_SEL ECT2
+VLED
+VLED_RGB
GND
BUTT ON S_IN
LEDS_O UT
SHIFT _CLK
LOAD_BUTTONS
LOAD_LEDS
EXT 0
EXT 1
EXT 2
EXT 3
EXT 4
GND
+3V3
GND
+VLED_RGB
LOAD_LEDS
LED_ENABLE
SHIFT _L E DS
PADS_LEDS_OUT
GND_LED
+3V3
+3V3
GND GND
GND
+5VUNREG
GND
+5VUNREG
LED_ENABLE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
J19
Q13
MBT4403
D21
SMAJ10A
1
2
3
D3
BAV99
L7
1K @ 100MHz
1
2
J13
Q10
MBT4403
Q1
MBT4403
Q12
MBT4403
Q14
MBT4401
Q11
MBT4401
GND
1 2
U22A
74AHC04
3 4
U22B
74AHC04
5 6
U22C
74AHC04
13 12
U22F
74AHC04
147
GND
VCC
U22G
74AHC04
PAD_RET URN0
PAD_RET URN1
PAD_RET URN3
PAD_RET URN2
PAD_SCAN0.
PAD_SCAN1.
0 ohm DNS
R33
0 ohm DNS
R97
0 ohm DNS
R105 0 ohm DNS
R94
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