LG 42LY750H Service Manual page 42

P_12V
L8700
BLM18PG121SN1D
R8702
10K
R8725 +3.5V_ST
820
1/16W
R8703
10K
R8729
10K
R8728
C
820
1/16W
R8734
B Q8726
Q8727
MMBT3904(NXP)
MMBT3904(NXP) C 47K
E
R8733 10K
JK8700
B
KRJV9768-1001-024
E
POWER_12V
1
RGB/TxD
2
COMPOSITE/AUDIO
3
AUDIO/IR
4
HDMI
5
B+ Control
6
Reserved/RxD
7
GND
8
LP870H High/MID Power SEQUENCE
POWER_ON/OFF!
POWER_ON/OFF2_1
POWER_ON/OFF2_2
POWER_ON/OFF2_3
POWER_ON/OFF2_4
SOC_RESET
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 right reserved.
Only for training and service purposes
RJP
Q8725
PMV48XP
C8702
2.2uF
G R8742
16V
10K
RJP_CTRL0
RJP_CTRL1
RJP_CTRL2
RJP_CTRL3
RJP_CTRL4
+3.5V_ST
PTC_UPDATE
R8745 SW8701
4.7K SKHMPWE010
E 1 2
R8746
UPDATE_SW
4.7K B 3 4
Q8711 C 5
MMBT3906(NXP)
LAN2_LINK
LAN1_LINK
POWER_ON/OFF1
POWER_ON/OFF2_1
UART3_TX
UART3_RX
RJP_CTRL0
RJP_CTRL1
RJP_CTRL2
RJP_CTRL3
RJP_CTRL4
/RTL8201_PMEB
+3.5V_ST
R8792
47K
C8717
R8769
2200pF
4.7K
Q8712
C
MMBT3904(NXP)
1 2
B
RESET_HIGH
3 4
E
5
R87118 4.7K
SW8700
R87119 4.7K
SKHMPWE010
R87120 4.7K
R87121 4.7K
PTC_RESET
+3.5V_ST
C8736
0.01uF
25V
R8782
4.7K
R8739
47K
EXT12V_CTRL
R87009 1K
R8780 100
LED_R
LED_R
C8713
10uF
6.3V
P6.4/A4
1
KEY1
P6.5/A5
2
KEY2
P6.6/A6
3
P6.7/A7
4
RL_ON
P7.4/A12
5
P7.5/A13
6
MICOM_MEMORY
R8774 100 P7.6/A14
OPT 7
OPT R87130 100 P7.7/A15
8 IC8701
C8718
P5.0/VREF+/VEREF+
1uF 9
OPT P5.1/VREF-/VEREF-
10
MSP430F5419IPZR
C8711
AVCC
27pF 11
AVSS
12
X8700 P7.0/XIN
13
32.768KHz P7.1/XOUT
14
DVSS
C8712 15
20pF
DVCC
OPT 16
P1.0/TA0CLK/ACLK
17
P1.1/TA0.0
18
P1.2/TA0.1
19
R8715 100 P1.3/TA0.2
20
R8716
100 P1.4/TA0.3
21
R8717 100 P1.5/TA0.4
22
R8718 100 P1.6/SMCLK
23
R8719 100 P1.7
24
R8800 100 P2.0/TA1CLK/MCLK
25
/RTL8201_INT
ETNHUB_INT +3.5V_ST
EXT_SPK_DET
R87014 1K OPT
WOL/WIFI_POWER_ON
POWER_DET
POWER_ON/OFF2_4
FRAM I2C
+3.5V_ST
+5V_ST
R87098
10K
Q8723
BSS83
D
FRAM_SDA_3.5V
B
S G
FRAM_SDA_5V
C8734
0.1uF
16V
+3.5V_ST
OPT
Q8724
BSS83
D
FRAM_SCL_3.5V
B
S G
FRAM_SCL_5V
C8735
0.1uF
16V
FRAM_SDA_5V
OPT
FRAM_SCL_5V
PTC MICOM
UART_SWB
+3.5V_ST
UART_SWA
GND_JIG
R87052
10K
R87054
100
C
C8728
47pF
E
P9.7 R87018 22 50V
75 MMBT3904(NXP)
ETHERNET_MDC
P9.6 22
74 R87017
ETHERNET_MDIO
P9.5/UCA2RXDUCA2SOMI
73
P9.4/UCA2TXD/UCA2SIMO
72
P9.3/UCB2CLK/UCA2STE
71 R87131 22
OPT
P9.2/UCB2SOMI/UCB2SCL
70
P9.1/UCB2SIMO/UCB2SDA
69 R87132 22
OPT
P9.0/UCB2STE/UCA2CLK R87093 22
68
PTC_WOL
P8.7 R87022
67 22
ETNHUB_PWR_ON/OFF
P8.6/TA1.1
66
/ETHERNET_RESET
P8.5/TA1.0 +3.5V_ST
65
ETNHUB_ENDEFER
DVCC2 C8723
64
DVSS2
63 0.1uF
VCORE
C8724
62
0.47uF
P8.4/TA0.4 R8765 100
61
WIFI_EN
P8.3/TA0.3
60
P8.2/TA0.2
59
P8.1/TA0.1
58
To HDMI
HDMI_CEC_PTC
P8.0/TA0.0 R87140 22
57 IR
P7.3/TA1.2
56
POWER_ON/OFF2_3
P7.2/TBOUTH/SVMOUT R87044 330
55
POWER_ON/OFF2_2
P5.7/UCA1RXD/UCA1SOMI
54
P5.6/UCA1TXD/UCA1SIMO
53
P5.5/UCB1CLK/UCA1STE R8791 100
52
AMP_EN
P5.4/UCB1SOMI/UCB1SCL
51
0 IR
R87042
OPT
R87013 22
EXT_SPK_MUTE
T_TERMINAL2
JP8701
B_TERMINAL2
R87037 100
UART3_RX
T_SPRING
R87038 100
UART3_TX JP8702
R_SPRING
B_TERMINAL1
T_TERMINAL1
JP8700
E_SPRING
xxLY750H-UA
PTC MICOM/RJP
+5V_ST
PTC_FRAM_A type PTC_FRAM_B type
IC8705 IC8705-*1
FM24C16B
FM24C16B
VDD NC_1
VDD NC_1
8 1
8 1
C8731
WP NC_2
0.1uF WP NC_2
7 2
7 2
SCL NC_3
SCL NC_3
6 3 6 3
SDA VSS
SDA VSS
5 4 5 4
CHECK
+5V_ST
+5V_ST
R87068
4.7K
B
MPI_DIN
R87081
Q8717
100
MPI_DOUT
C
R87064
4.7K
B Q8719
MMBT3904(NXP)
C8729
GND_JIG E
47pF
CHECK
50V
bLAN model : need to pull up
Non bLAN model : open collector
+3.5V_ST
MPI_IR
R87135
10K
C
R87136 10K B Q8721
Q8718
MMBT3904(NXP)
MMBT3904(NXP)
C
E
R87133 68K B
E
R87134
33K
IR_OUT_RS232
6B
7B
5
4
7A
6A
3
PEJ027-04
JK8701
2013.12.24
17 21
LGE Internal Use Only