M-Audio Venom, Service Manual, Page: 14 / 22

S0-49
G0
11/12/2010
C
PART NUMBER:
ASSY NUMBER:
REV:
SIZE:
TITLE:
COMPANY:
RELEASED: DATED:
CHECKED: DATED:
DATED: DRAWN:
SCALE:
FILE NAME:
1:1
REVISION RECORD
APPROVED: ECO NO: LTR DATE:
1 2 3 4 5 6
D
C
B
A
C
D
B
A
CE
SHEET: OF
3.3V
1.8V
Digital
Digital
+/-9V Switching Regulator
COILCRAFT
LPO4812-103 LPO4812-103
COILCRAFT
COILCRAFT
LPO4812-103
COILCRAFT
LPO4812-103
Power Jack
9V DC, 1A
6 2
changed to common 1.8V 1117
Made soft start longer
+5.0VA moved to analog secion
changed power caps
POWER SWITCH
CONNECTOR
(CM PART ADDITION)
Added to rev_B
JS 090126
PCB MOUNTING HOLES
+ C129
22uF
20%
C87
X7R
100nF
C102
X7R
100nF
+
C82
20%
10uF
C83
X7R
100nF
C96
X7R
100nF
1
GND
2
OUT
3
IN
4
TAB(OUT)
U12
AP1117E18
3
IN
2
OUT
1
GND
4
TAB(OUT)
U16
LM1117T-3.3
1
FB1N
2
FB1P
3
VREF
4
FB2P
5
FB2N
6
SW2
7
SHDN/SS2
8
VIN
9
SHDN/SS1
10
SW1
1
1
G
N
D
U99
LT3471
R621
47K
C476
1uF
R622 15K
R623 15K
R624
127K
R625
137K
C478
100nF
C479
100nF
C480
1uF
C481
75pF
C482
56pF
C484
100nF
D183
MBRS130LT3
D184
MBRS130LT3
C103
10uF
C110
10uF
L2
10uH 0.49A
L3
10uH 0.49A
R121 10R
C63
X7R
100nF
R123 0R
R150 0R
L1
10uH 0.49A
C85
1uF
L4
10uH 0.49A
C86
10uF
C88
1000pF
1
3
2
J23
POWER JACK
C125
X7R
100nF
R144
47R
+
C24
20%
10uF
C90
100nF
GND
1 IN
2
3 OUT
4
U23
+5V
LM7805
D15
1N4001
+ C48
22uF
20%
+
C50
22uF
20%
1
2
3
J16
CON/XH2.54/XH2.54-03Z
MH1 MH2 MH3
MH4
MH5
MH6
MH7 MH8 MH9 MH10
MH11
MH13 MH14
MH15 MH16
L5
BEAD, 200R@100MHz
DGND
DGND
+3.3V
DGND
+1.8V
DGND
DGND
DGND
+VA
-VA
+AVCC
DGND
DGND
+3.3V
DGND
+5.0V
DGND
DGND
AGND
AGND