Usb Board - Dell 2707WFP Service Manual

27" LCD Color Monitor

7.2 USB Board

CN701 +12V
1
2
3 USB Switch
4 C704
5
+
6 220uF/25V
7
8
+5V
CON8 USB Switch
USB5V_UP
R709
100K 1/16W U704
2502
Upstream
VBUSDET 25
VBUSDET USBDP0
USBDN0
R711
C717 100K 1/16W
1uF/16V
Dow nstream 1
USBDP1
+5V
USBDN1
15
/OC1 OCS_N PRTPWR
GR1/NON_REM0
6/27 C793 ZD711
0.1uF/16V UDZS5.6B
U709
3 Dow nstream 2
VCC
USBDP2
2 GND
RSTN
USBDN2
1
GND
VCC3.3V_2502
G691L400T73
GR2/NON_REM1
EEPROM
SDA/SMBDATA
R720 R721
10K 1/16W 10K 1/16W
SCL/SMBCLK/CFG_SEL0
CFG_SEL1
Common
SELF_PWR 16
SELF_PWR
CLKIN_EN 22
CLKIN_EN
R727
10K 1/16W
VCC3.3V_2502 PRTPWR_POL 13
PRTPWR_POL VDD18PLL
R729 TEST 23
TEST
R731 10K 1/16W
VDDA33
100K 1/16W
VDDA33
Low reset , at least 100ns
RESET_N 24
RESET_N
VDDA33PLL
C730
0.1uF/16V
31
XTAL1/CLKIN
VDDA33CR
C736
33pF X701 R735
24MHz 1M 1/16W
C737
30
XTAL2
33pF
For USB Detect 9/8
USB5V_UP
R781
10K 1/16W
C795 R780
0.1uF/16V
20K 1/10W
GND
R710
2 NC C738
0.1uF/16V
L701
3 3 L 4 1
2
2 1 3
4
R712 FB723
NC
600 OHM
FB703
6 USB_D+
USB_D+
1
USB_D-
5 600 OHM
USB_D-
14 VBUS VCC3.3V_2502 R714
VBUS
100K
11 GR1 R715
10K 1/16W
8 USBDP2
DP1
9 USBDN2
DM1
VCC3.3V_2502
12 GR2 R717
10K 1/16W
R718
NC
19 SDA_USB R719
10K 1/16W
20 SCL_USB
21 CFG_SEL1 R723
10K 1/16W
R724
34 ATEST R725 10K 1/16W
ATEST
10K 1/16W
35 RBIAS R701
RBIAS
12K 1/16W
18
VDD18
27
VDD18
C724 C725
0.1uF/16V
4.7uF/16V
32 VDD18PLL_2502
C726 C727
0.1uF/16V
4.7uF/16V
FB706 VCC3.3V_2502
1 VDDA33 1 2
7 600 OHM
C728 C729
0.1uF/16V 0.1uF/16V C701
4.7uF/16V
VCC3.3V_2502
FB701
33 1 2
600 OHM
C731
0.1uF/16V C732
4.7uF/16V
28
4 C734
VSSA
10 C733 4.7uF/16V
VSSA
0.1uF/16V FB708
600 OHM
17 1 2
VSS
26 1 2
VSS
29 FB709
VSS
36 600 OHM
VSS
0
1N41418N
D701 2.2 1/8W
R765
U708
0.001uF 1uF/25V
C742 8 1
Phase BST
7 2
COMP/SS DH
R766 C743
1.5K 1/16W 0.1uF 6 3
SENSE GND
Upstream 5 4
VCC DL
USB from
R767 C791 C744 SC2608
+
0 1/16W 1uF/25V
PC
220uF/25V
CN702
CONNNECTOR
5/30 EMI USB_5V
2
1/16W
USB_5V
C721
0.1uF/16V
F702
5V 0.75A
FB704
t
VBUS2
2 1
120 OHM
R713 C719
+
10K 1/16W 100uF/16V
/OC2
R716
15K 1/16W
USB_5V
F701 VBUS1
5V 0.75A
FB705
t
2 1
120 OHM
R722 C722
+
10K 1/16W
100uF/16V
/OC1
R726
15K 1/16W
VCC3.3V_2502
U701
1 8
A0 VCC
2 7
A1 WP
3 6 SCL_USB
A2 SCL
4 5 SDA_USB C718
GND SDA
NC
M24C02WMN6
OPTION
49
+12V
R779 0
1/16W
+
R764 C739 C785
1uF
1000uF/16V
Q705
IRFR3709ZPbF
73T 253171 LS
L705 L706
10uH
C784
R768 R772
2.2 1/8W C746 C780 C781 53.6K 1/16W 1%
+ + +
Q706
IRFR3709ZPbF R773
C777 10K 1/16W 1%
1000pF
VCC3.3V_2502
U703
AIC1117-33CY SOT-223
3 2
VI VO
C705
C706
C709 10uF/16V 0.1uF/16V
0.1uF/16V
Reset_N
C720
0.1uF/16V
GR2/NON_REM1
GR1/NON_REM0
R728
NC
L703
C723 3 L 4
DM1
0.1uF/16V
2 1
DP1
R730
NC
R732
NC
L704
3 L 4
1 DM2
2 1
1 DP2
R733
NC
Dell 2707WFP
SMBUS or
CFG_SEL1 CFG_SEL0
EEPROM
L X SMBUS
1/4W
H L Default
H H EEPROM
USB_5V
NC +5V
C750
+
0.1uF
C747
SELF_PWR H L
Detect
enable disable
self power
CLKIN_EN H L
Pin30,31 OSC X'TAL
Reset_N
PRTPWR_POL
H L
PRTPWR Active H Active L
P1:removable (yes also means GRN
P2:removable LED active high)
P1:yes P1:no P1:yes P1:no
P2:yes P2:yes P2:no P2:no
L L H H
L H L H
FB721
5/30 EMI
1 2
600 OHM
VBUS1
CN703
9 11
5 6 7 8
10 12
1 2 3 4
VBUS2
FB722 1 2 5/30 EMI
600 OHM
FB707
1 2
600 OHM
R734
100K 1/16W
C735
0.1uF/16V
VBUS1,2,3,4 at least 50mil