LG 28LN45 Series Service Manual page 23

DSUB RGB
R408
10K
OPT
C401
18pF 18pF
50V
121128
121128
VA400 VA401 ESD improve
ESD improve
OPT->APPLY
OPT->APPLY 20V 20V
2:E18 DSUB_VSYNC JP400
DSUB_HSYNC JP401
2:E18
L401
BLM15BD121SN1
DSUB_B+
R429 0
R400
C419
R427 0
75
47pF
L402
50V R426 0
BLM15BD121SN1 JP405
DSUB_G+
C420 R401
47pF 75
L403
50V JP406
BLM15BD121SN1
DSUB_R+
C421
R402
47pF
75
50V
11.10.31
To Improve EMI
11.10.27
To Improve Ringing issue
LOW capacitance Part apply
RS232C(SIDE) Hotel_Model(RS232C apply)
C402
0.33uF
16V
Hotel_Model(RS232C apply)
Hotel_Model(RS232C apply)
C406
0.33uF
16V
IC401
MAX3232CDR
Hotel_Model(RS232C apply)
R410
0
NON_Hotel_Model(RS232C Bypass)
PM_TXD
R412
0
R415
PM_RXD 100
NON_Hotel_Model(RS232C Bypass)
R414
100
VA408
VA410
20V
20V
OPT OPT
JP412
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+3.3V_ST +5V_Normal
D416
MMBD6100
A2
C
A1
R413
10K
RGB_DDC_SCL
RGB_DDC_SDA
OPT
121128
OPT
C403 ESD improve
VA415 R405
OPT->APPLY
0
20V
50V
PM_RXD
OPT
R406
0
PM_TXD
121128
OPT OPT
ESD improve 12.07.02
R403 R404
OPT->APPLY BY.Hwang
0 0
+3.3V_ST
VA417
20V
JP408
JP409
R434
47K
DSUB_DET
C
Q400
JP407
R435
B MMBT3904(NXP)
10K
VA418
R431
E
0 20V
OPT
111026
Can be deleted??
121128
ESD improve
OPT->APPLY
LAN_JACK_MAIN
JK400
SPG09-DB-010
RJ45VT-01SN002
+3.3V_ST
C407
0.33uF
16V
C408
0.1uF
16V
Hotel_Model(RS232C apply)
Hotel_Model(RS232C apply)
C409
0.1uF
16V
+3.3V_ST
P400
VA411
12507WS-04L
20V
1
VA412
20V
2
3
JP414
JP413
4
(OPT)IR_OUT
IR_OUT
5
R416
0
Hotel_Model(RS232C apply)
PC AUDIO(SIDE)
+3.3V_Normal
R407
12.08.10
470K
47K->470K R409
1K
VA407
JP411
20V
OPT
R444
15K
6 M6
JP404 C414 R442 R446
VA419
220pF 470K 10K
1 M1 20V
50V
3 M3_DETECT
R445
15K
4 M4
JP403
R441
C413 470K
VA420 R447
5 M5_GND
220pF
20V 10K
50V
KJA-PH-1-0177
JK401
JP402
ETHERNET
111026
LAN Jack deletion
111117
LAN Jack Addition for T2
+3.3V_Normal
LAN_JACK_SUB(XMULTIPLE(MP))
R411
JK403-*1 JK403
0
XRJV-01V-0-D12-080
LAN_JACK
1
1 1
2
2 2
3
3 3
4
4 4
5
5 5
6
6 6
5.6B
7
ZD400
7 7
8 C410
8 8 5.6B
0.01uF
ZD401
50V
LAN_JACK
9 9
121017
Change
9 9
USB(SIDE)
OUT_2
OUT_1
C400 C404
0.1uF 10uF
10V
PC_AUDIO_DET OPT
3AU04S-305-ZC-(LG)
PC_R_IN
JK402
JP429
PC_L_IN
JP428
JP427
VA424
VA425
20V 20V
121128 121128
ESD improve ESD improve
OPT->APPLY OPT->APPLY
Jack Shield (HDMI1, HDMI2, RGB)
JackShield(for NonCKD)
M1
MGJ63348201
EPHY_TP
EPHY_TN
EPHY_RP
EPHY_RN
120918
JIG GND Point addition
JP_GND1 JP_GND2 JP_GND3 JP_GND4
NC4_S7LRM
INTERFACE
IC400
AP2191DSG
+5V_USB
NC GND
8 1
IN_1
7 2
IN_2
6 3
FLG EN C405
5 4
USB_CTL 0.1uF
R417
10K
R419
47
USB_OCD
USB_DM 1:AL8
USB_DP
1:AL7
111026
ESD diode deletion
EAH39491601 2EA
120103
ESD diode addition
EAF61530301 2EA
JackShield(for CKD)
M1-*1
MGJ63348202
EAX65303801
2013.1.14
4 13
LGE Internal Use Only