LG 31MU97 Service Manual page 24

JK900
SJ113262
VBUS
1
D-
2
D+
3
GND [Test pad guidance]
4
Test pads(jig-point, test-point) and their connecting wire
is unacceptable for Gigabit rate links.
STDA_SSRX-
5
STDA_SSRX+
6
GND_DRAIN
7
STDA_SSTX- 0.1uF
8
STDA_SSTX+ 0.1uF
9
10
SHIELD
JK901
SJ113262
VBUS
1
D-
2
D+
3
GND [Test pad guidance]
4
Test pads(jig-point, test-point) and their connecting wire
is unacceptable for Gigabit rate links.
STDA_SSRX-
5
STDA_SSRX+
6
GND_DRAIN
7
STDA_SSTX- 0.1uF
8
STDA_SSTX+ 0.1uF
9
10
SHIELD
JK902
SJ113262
VBUS
1
D-
2
D+
3
GND [Test pad guidance]
4
Test pads(jig-point, test-point) and their connecting wire
is unacceptable for Gigabit rate links.
STDA_SSRX-
5
STDA_SSRX+
6
GND_DRAIN
7
STDA_SSTX- 0.1uF
8
STDA_SSTX+ 0.1uF
9
10
SHIELD
JK903
UEB1112C-2AK1-4H
[USB Pattern impedance guidance]
USB shall have a 90ohm of pattern impedance not a 100ohm.
(DP,DM,SSTX,SSRX)
VBUS
1
D-
2
D+
3
GND
4
STDB_SSTX- C924 0.1uF
5
STDB_SSTX+ C925 0.1uF
6
GND_DRAIN
7
STDB_SSRX-
8
STDB_SSRX+
9
10
SHIELD
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.
Copyright © 2014 LG Electronics Inc. All rights reserved.
Only for training and service purposes
+3.3V_USB_IN
USB1_D_PWR
USBDN_DM1
C900 C910 C911 C912
USBDN_DP1
0.1uF 0.1uF 0.1uF 0.1uF
USB_SSRXM_DN1
USB_SSRXP_DN1
C907
USB_SSTXM_DN1
C908
USB_SSTXP_DN1
USB2_D_PWR
USBDN_DM2
USBDN_DP2
USB_SSRXM_DN2
+3.3V_USB_IN
USB_SSRXP_DN2
HS_ACTIVE
SS_ACTIVE
EN_PWR1
EN_PWR3
C901
USB_SSTXM_DN2
+1.05V_USB
USB_SSRXP_DN3
C902
USB_SSTXP_DN2 USB_SSRXM_DN3
USB_SSTXP_DN3
USB_SSTXM_DN3
C909
6.8pF
50V
USB3_D_PWR
USBDN_DM3
USBDN_DP3
USB_SSRXM_DN3
USB_SSRXP_DN3
C903
USB_SSTXM_DN3
PM_S3_EN
C904
USB_SSTXP_DN3
TBT OPT
R903
D900
ENKMC2838-T112
A1
C
VBUS_DET
A2
VBUS_UP
USB_DM_UP
USB_DP_UP
SMB_DATA
USB_UP_TX-
SS_ACTIVE
USB_UP_TX+
USB_UP_RX-
USB_UP_RX+
+1.05V_USB
C913 C914 C916 C920 C930 C933 C952 C921
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
+3.3V_USB_IN
C932
0.1uF
C934
+3.3V_USB_IN
0.1uF
+1.05V_USB
+3.3V_USB_IN
VCC_1 VCCA5
1 66
GRN_LED1 VCCO
2 65
THERMAL
HS_ACTIVE DM_2
3 64
89
SS_ACTIVE DP_2
4 63
PRON1 DM_1
5 62
PRON3 DP_1
6 61
GND_1 VCCU_5
7 60
VDD VDDU_4
8 IC903 59
RXP_3 DM_4
9 58
ASM1074
RXN_3 DP_4
10 57
GNDA_1 VCCU_4
11 56
TXP_3 DM_3
12 55
TXN_3 DP_3
13 54
VCCU_1 VCC_2
14 53
TXP_4 GRN_LED2
15 52
TXN_4 LPWR_EN
16 51
GNDA_2 PRON4
17 50
RXP_4 AMB_LED3
18 49
RXN_4 AMB_LED2
19 48
VDDU_1 AMB_LED4
20 47
XI PRON2
21 46
XO TEST_EN
22 45
R932
4.7K
+3.3V_USB_IN
+1.05V_USB
2014.05.20 Modify
R928
12.1K
1%
TP900
TP910
PM_S0_EN
VBUS_UP
+3.3V_USB_IN
OPT
R904
0
0 R929
100K
POR_N
R905
C947
100K
1uF
6.3V
OPT
C917
R906
200K 0.1uF
1%
16V
OPT
R921
200K
1%
+3.3V_USB_IN
IC902
+3.3V_USB_IN
R925 W25X40CLSNIG
1K
CS VCC
1 8
R930
1K
DO[IO1] HOLD
2 7
WP CLK
3 6
HS_ACTIVE
GND DI[IO0]
4 5
SMB_CLK
C951
R931
0.1uF
4.7K
16V
+USB_5V_1
C922 C923 C926 C927 C929 C957
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
C945
C939
10uF 0.1uF
2014.05.20 Modify
R914
10
1/8W
+USB_5V_2
R933
10
1/8W
+5V_IN
+USB_5V_1
R934
10
1/8W
C954 C956
0.1uF 2.2uF
16V 10V
C915
C905
10uF 0.1uF
+3.3V_USB_IN
C953 C955
0.1uF 2.2uF
+3.3V_UART
16V 10V
+USB_5V_2
OPT
L900
CB2012PK501T
Close to IC
+5V_IN
C918
C906
10uF 0.1uF
USBDN_DM2
USBDN_DP2
USBDN_DM1
USBDN_DP1
+1.05V_USB
USBDN_DM4
USBDN_DP4
C943
0.1uF
USBDN_DM3
USBDN_DP3
AT24C32D-SSHM-T
A0
1
A1
2
EN_PWR2
A2
3
GND
4
+3.3V_UART
C937 C942
0.1uF 0.1uF
16V 16V
R909
10K
R910
R907 33
USBDN_DP4
R908
33
USBDN_DM4
C938 C944
22pF 22pF
C935 C936
0.01uF 0.1uF
25V 16V
+3.3V_UART
/USB2SER_RESET
IC907
BD82020FVJ
USB1_D_PWR
2014.05.20 Modify
GND OUT_3 +3.3V_USB_IN
1 8
C946
CURRENT
100uF
IN_1 OUT_2
LIMITER 16V
2 7
(1A) R920
10K
IN_2 OUT_1
3 6
EN OC
EN_PWR1 4 5 OCS1
IC900
BD82020FVJ
USB2_D_PWR
2014.05.20 Modify
GND OUT_3 +3.3V_USB_IN
1 8
C919
CURRENT
100uF
IN_1 OUT_2
16V
LIMITER
2 7
(1A)
R901
10K
IN_2 OUT_1
3 6
EN OC
EN_PWR2 4 5 OCS2
IC901
BD82020FVJ
USB3_D_PWR
2014.05.20 Modify
GND OUT_3 +3.3V_USB_IN
1 8
C928
CURRENT
100uF
IN_1 OUT_2
LIMITER 16V
2 7
(1A)
R902
10K
IN_2 OUT_1
3 6
EN OC
EN_PWR3 4 5 OCS3
+3.3V_UART
IC905
R912 R913 R918
10K 10K 10K
VCC
8
WP
7 EDID_WP1
USB
EEPROM
SCL
6
USB_SCL
SDA
5
USB_SDA
C949 C950
18pF 18pF
2 3
GND_1 X-TAL_2
1 4
X-TAL_1 GND_2
12MHZ
X900
R919
10K
+3.3V_UART +3.3V_UART
VREGEN TEST1
1 24
THERMAL
SUSPEND TEST0
2 33 23
VCC_1 CLKOUT
3 22
R923 R924
IC906
VDD18 DTR
4 21 10K 10K
TUSB3410RHBR
1.5K
PUR RTS
5 20
USB TO UART
DP SOUT/IR_SOUT
6 19 UART_TX
DM GND_2
7 18
GND_1 SIN/IR_SIN
8 17
UART_RX
+3.3V_UART
R916
10K
R911
10K
C948
1uF
UHD MODEL
2014.2.14
USB UART 9 18
LGE Internal Use Only