LG 27GL850 Service Manual page 31

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THERMAL
THERMAL
C903 0.1uF
USB_SSTXP_DN2
USBDN_DP1
USB_SSRXP_DN2
USB_SSTXM_DN1
USB_SSTXM_DN2
USBDN_DM2
VBUS_UP
USB_SSRXM_DN2
C902 0.1uF
USB_UP_RX+
USB_SSRXP_DN1
C907 0.1uF
USB_SSTXP_DN1
USBDN_DP2
USB_DM_UP
USB_UP_TX-
USB_DP_UP
USB_UP_TX+
USB_UP_RX-
USB_SSRXM_DN1
USBDN_DM1
USB1_D_PWR
C906 0.1uF
USB2_D_PWR
JK900
SP12-12078-A01
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
JK902
SP12-12078-A01
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
JK903
SP12-12078-B01
1
VBUS
2
D-
3
D+
4
GND
5
STDB_SSTX-
6
STDB_SSTX+
7
GND_DRAIN
8
STDB_SSRX-
9
STDB_SSRX+
10
SHIELD
R920
2.2
R921
2.2
R922
2.2
R924
2.2
R935
1K
+3.3V_HUB
TEST-POINT
EN_DN2_PWR
+1.1V_HUB
R925
10K
OPT
C918
10uF
10V
C929
0.1uF
16V
USBDN_DP2
C912
2.2uF
10V
OPT
C933
0.1uF
16V
R939
10K
OPT
R940
1K
OPT
USB_SSTXM_DN2
C942
0.01uF
50V
+3.3V_HUB
R936
10K
OPT
R937
1K
OPT
R930
4.7K
OPT
C923
0.1uF
16V
R931
4.7K
OPT
USB_SSRXP_DN2
R905
4.7K
USB_SSRXM_DN2
R912
6.8K
1%
+1.1V_HUB
USB_HUB_RESET
R903
4.7K
R908
2.7K
1%
C925
0.01uF
50V
R926
4.7K
OPT
C937
0.01uF
50V
R932
10
C928
10uF
10V
USB_SSTXP_DN2
R946
10K
OPT
R928
4.7K
OPT
R934 10
IC901
TUSB8041IRGCR
1
USB_DP_DN1
2
USB_DM_DN1
3
USB_SSTXP_DN1
4
USB_SSTXM_DN1
5
VDD_1
6
USB_SSRXP_DN1
7
USB_SSRXM_DN1
8
VDD_2
9
USB_DP_DN2
10
USB_DM_DN2
11
USB_SSTXP_DN2
12
USB_SSTXM_DN2
13
VDD_3
14
USB_SSRXP_DN2
15
USB_SSRXM_DN2
16
VDD33_1 33 PWRCTL3/BATEN3
34
VDD33_2
35
PWRCTL2/BATEN2
36
PWRCTL1/BATEN1
37
SDA/SMBDAT
38
SCL/SMBCLK
39
SMBUSZ/SS_SUSPEND
40 FULLPWRMGMTZ/SMBA1/SS_UP
41
PWRCTL_POL
42 GANGED/SMBA2/HS_UP
43
OVERCUR4Z
44 OVERCUR3Z
45
AUTOENZ/HS_SUSPEND
46 OVERCUR1Z
47
OVERCUR2Z
48
USB_VBUS
65
USBDN_DM2
R943
10K
OPT
X900
24MHz
C920
0.1uF
16V
C946
0.01uF
50V
C927
0.01uF
50V
C911
1uF
10V
+3.3V_HUB
R942
10K
OPT
OCS_DN2
C939
0.01uF
50V
OCS_DN1
R927
10
VBUS_DET
R914
4.7K
OPT
VBUS_DET
R948
1K
R941
10K
OPT
R929
10
C931
0.1uF
16V
R917
4.7K
OPT
EN_DN1_PWR
R949
1K
R938
10K
OPT
R910
1M
1%
R933
10
C935
0.01uF
50V
+3.3V_HUB
R904
4.7K
R902
4.7K
C943
10uF
10V
R962
100K
R957
47K
R958
6.8K
1%
C926
0.1uF
50V
OPT
R951
100K
OPT
C941
10uF
10V
C949
10uF
10V
R950
14K
1%
USB1_D_PWR
R947
20K
OPT
OCS_DN1
C950
10uF
10V
R953
10K
1%
R952
14K
1%
C936
0.047uF
25V
R945
100
C924
4.7uF
25V
OPT
+19V
C952
10uF
10V
C938
82pF
50V
OPT
USB2_D_PWR
C951
10uF
10V
5V_ST_ON
USB_5V
C921
4.7uF
25V
OCS_DN2
C947
10uF
10V
R960
100K
C944
10uF
10V
C919
4.7uF
25V
L902
4.7uH
R955
10K
R954
120K
1%
C953
10uF
10V
C954
10uF
10V
C940
1uF
10V
+3.3V_HUB
C948
10uF
10V
IC902
1
VIN_1
3
VIN_3
7
V7V
15
NFAULT1
16
SW_IN1
17
SW_IN2
18
BST
19
LX_1
20
LX_2
21
LX_3
5
PGND_2
6
PGND_3
4
PGND_1
2
VIN_2
29
C934
0.047uF
25V
C945
10uF
10V
R956
47K
R959
51K
1%
ZD902
5.6V
OPT
C922
1uF
25V
C930
2200pF
50V
ZD903
5.6V
OPT
C932
100pF
50V
OPT
C908
0.47uF
50V
C914
10uF
10V
+3.3V_HUB
R900
24.9K
1%
24.9K
C915
10uF
10V
R907
68K
USB_5V
R901
20K
1%
IC900
MP2122AGJ
3
SW2
2
EN2
4
EN1
1
FB2
5
GND
6
SW1
7
IN
8
FB1
C904
0.1uF
16V
C913
0.1uF
16V
C916
10uF
10V
R923
120K
1%
ZD900
2.5V
OPT
R915
200K
C905
0.47uF
16V
OPT
R906
200K
R911
100K
R919
27K
1%
C901
10uF
10V
C917
0.1uF
50V C900
10uF
10V
R913
100K
ZD901
5V
OPT
+1.1V_HUB
USB_5V
R909
68K
VBUS_UP
R1026
100K
1%
D900
MMBD6100
A2
C
A1
R961
20K
1%
AR900
33
USB_HUB_SDA
USB_HUB_SCL
C910
10pF
50V
C909
10pF
50V
L901
2.2uH
L900
2.2uH
C955
33pF
50V
OPT
C956
33pF
50V
OPT
C957
10uF
10V
OPT
C958 0.1uF
C959 0.1uF
[USB Pattern impedance guidance]
USB shall have a 90ohm of pattern impedance not a 100ohm.
(DP,DM,SSTX,SSRX)
[Test pad guidance]
Test pads(jig-point, test-point) and their connecting wire
is unacceptable for Gigabit rate links.
[Test pad guidance]
Test pads(jig-point, test-point) and their connecting wire
is unacceptable for Gigabit rate links.
Added serial Resistor for protected by damage from short
Hyunseung Ku 150304
Added serial Resistor for protected by damage from short
Hyunseung Ku 150304
8 8
34UCxx
USB HUB
2019.02.12
(PD Controller : USB 2.0 Signal)
5V
0.5V
USB DN Port #2
USB DN Port #1
(C-Type connector : USB 3.0 Signal)
release option R733,R734
10K->1K
USB Downstream Signals
20150901 18pF->8pF
If you don't use USBDN_DP4, DM4, please apply R914, R916,R917,R918
USB HUB
6A
Current limit 1.64A (USB Port#1)
Current limit 1.64A (USB Port#2)
19V TO 5V (USB Down Stream 1.5A *2EA)
Close to IC R2
R1
1.5A
Vout=0.6*(1+R1/R2)=5.1V
1.5A
2A
5V to 1.1V // 3.3V IC Power
QUICK CHARGE PORT
0.83V
20160603 8pF->10pF
QUICK CHARGE PORT
FW Update