M-Audio Keystation 49 Service Manual page 7

1 2
A
C52
100nF
CHGND GND
J1
1 L1 GND
+VBUS
2 742792651
D-
3
D+
4 L2
GND
742792651
C4
R10
100nF
SFI0603
C5
100nF
GND
CHGND
B
+3.3V
R11
10K
L3
J4
2
T
3
R
1
S
1/4" STEREO JACK
GND
+3.3V
J7
1
C
2
3
MAIN_VOL
C9
PH2.0-3Z
100nF
GND
+3.3V
J8
1
2
3
4
5
6 C10 C11
PH2.0-6Z 100nF 100nF
GND
D
1 2
3
SW1A
3 R3
3
2 GND
2
1 10K
1
W[0..15]
SK-22F12-G7
+5V
SW1B
6 D1 574_CLK
6
5 VBUS
5 W0
4
4 W1
SS12 C2
C3
SK-22F12-G7
W2
R1
4.7uF
W3
47R
100nF
W4
W5
W6
GND W7
VBUS
R6 22R USB_D-
USB_D-
R7 22R USB_D+
USB_D+
W0
W1
W2
W3
W4
W5
W6
W7
MAIN_VOL
MAIN_VOL
SUSTAIN
SUSTAIN
574_CLK
574_CLK
LED1 L6
R24 220R
SUSTAIN LED2 L7
SUSTAIN
PEDAL_VOL
PEDAL_VOL
MODULATION
MODULATION
PITCHBEND
D9 PITCHBEND
BAT54S
+3.3V
GND
+3.3V
+5V
MODULATION
R20 1K
PITCHBEND
RESET
RESET
GND
3
4 5
+3.3V +3.3V
C1
C12
100nF
22uF
GND
U1
SN74HC574NSR
1
OE
574_CLK 11
CLK W[0..15]
2 19 W13
D0 Q0 W12 R22
3 18 W12
D1 Q1 W13 R23
4 17 W11
D2 Q2
5 16 W10
D3 Q3
6 15 W9
D4 Q4
7 14 W8 R15
D5 Q5 FR0 1
8 13 LED3
D6 Q6 FR1 3
9 12 LED4
D7 Q7 FR2 5
FR3 7
FR4 1
FR5 3
FR6 5
FR7 7
GND
FR[0..7] R16
R12
FR0 2
U2
FR1 4
2 18 FR0
P00 P20 FR2 6
1 17 FR 1
P01 P2 1 FR3 8
32 16 FR 2
P02 P2 2 FR4 2
15 FR 3
P2 3 FR5 4
14 FR 4
P2 4 FR6 6
13 FR 5
P2 5 FR7 8
31 12 FR 6
P03 P2 6
30 11 FR 7 R13 10K
P04 P2 7
29
P05
28 10 L5 74279265 P3.0/C2D/LED0
P06 P30/C2D
27 4 USB_D+
P07 D+ USB_D+
5 USB_D-
D- USB_D-
26 8 VBUS
P10 VBUS
25 +5V
P1 1
24 7
P1 2 REGIN
74279265 23 9 RESET
P1 3 RST/C2CK RESET
74279265 22
P1 4
21 +3.3V
P1 5
20 6
P1 6 VDD
19 3
P1 7 GND
C51 C8
C7
C8051F320
100nF 100nF 4.7uF
GND
GND
DEBUG
J10
1 2
3 4 P3.0/C2D/LED0
P3.0/C2D/LED0
5 6 R21 1K
7 8
9 10
GND
4 5
6
J2
22R WR12 1 2
22R WR13 3 4
5 6
7 8
9 10
22R
2 RD0 11 12
4 RD1 13 14
6 RD2 15 16
8 RD3 17 18
2 RD4 19 20
4 RD5 21 22
6 RD6 23 24
8 RD7 25 26
22R
10K
1
3
5
7
1 GND GND
3
J5
5
1 LED3 C13
7
2 LED4 C14
3 LED1 C15
4 LED2 C16
GND
5
P3.0/C2D/LED0
6 WR12 C17
7 WR13 C18
8 RD2 C19
VBUS
9 RD3 C20
10 RD4 C21
11 RD5 C22
12 RD6 C23
C6 C49 13 RD7 C24
14 P3.0/C2D/LED0 C25
100nF 100nF
PH2.0-14Z
GND
Title
Size Number
A3
Date: 2014-4-4
File: C:\Documents and Settings\..\MK33.01.06.SchDoc
6
7 8
A
R17 22R
WR11 7 8 W11
WR10 5 6 W10
WR9 3 4 W9
WR8 1 2 W8
W[0..15]
R18
22R
WR7 2 1 W7
WR6 4 3 W6
WR5 6 5 W5
WR4 8 7 W4
R19
WR3 7 8 W3
WR2 5 6 W2
WR1 3 4 W1
WR0 1 2 W0
22R
47pF
47pF
47pF
B
47pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
22pF
47pF
GND
C
D
MK33.01
Revision
06
Sheet of
Drawn By:
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