LG Electronics 42LT640H-ZA service manual Rgb/Spdif/Pc/Hp/Usb, Usbdiodes, LGE Internal Use Only

Page 27
RGB/SPDIF/PC/HP/USB

RGB/SPDIF/PC/HP/USB

EARPHONE BLOCK

 

 

 

 

 

 

 

 

 

HP_LOUT

 

 

 

 

 

 

 

 

 

 

 

C1118

 

 

 

 

 

 

 

 

 

 

 

10uF

 

 

 

 

 

 

 

 

 

 

 

16V

 

HEAD_PHONE

 

 

 

 

 

 

 

 

HEAD_PHONE

C1115

 

 

 

 

 

 

 

 

R1125

 

 

 

 

 

 

 

 

 

1000pF

1K

HEAD_PHONE

C

E

 

 

 

 

HEAD_PHONE

 

50V

 

 

 

 

 

JK1101

 

 

 

 

 

 

 

 

 

OPT

 

 

Q1101

B

 

+3.3V_Normal

 

KJA-PH-0-0177

 

 

MMBT3904(NXP)

B

Q1104

 

 

PHONEHEAD

 

 

 

 

 

 

 

1K

 

DETECT

3

 

 

 

 

 

E

MMBT3904(NXP)

R1130

10K

 

GND

5

 

 

 

 

 

 

L

4

 

 

 

 

 

 

CHEAD_PHONE

 

 

 

 

 

 

 

 

 

 

 

 

R1155

 

 

 

 

 

 

 

 

 

HP_DET

 

 

 

 

 

 

 

 

 

 

 

HEAD_PHONE

 

R

1

HP_ROUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C1119

 

 

 

 

 

 

 

 

 

 

 

10uF

 

 

 

 

 

 

 

 

 

 

 

16V

 

HEAD_PHONE

 

 

 

 

 

 

 

 

HEAD_PHONE

C1116

R1128

 

C

E

 

 

 

 

 

 

1000pF

1K

 

 

 

 

 

 

 

 

 

 

Q1102

B

 

 

 

 

 

 

 

50V

 

 

 

 

 

 

 

 

 

MMBT3904(NXP)

 

 

 

 

 

 

 

 

OPT

B

Q1103

 

 

 

 

 

 

 

HEAD_PHONE

 

 

 

 

 

 

 

 

E

MMBT3904(NXP)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C HEAD_PHONE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

USB_DIODES

 

 

 

 

 

RGB PC

 

 

 

 

 

 

+5V_Normal

 

 

 

 

 

 

 

 

 

D1115

 

 

 

 

 

 

 

 

 

 

 

MMBD6100

 

 

 

 

 

 

 

 

 

 

 

 

A2

 

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

A1

 

 

 

 

 

 

 

 

 

 

R1139

R1140

 

C1129

 

 

 

 

 

 

 

 

 

2.2K

 

 

 

 

 

 

 

 

 

 

2.2K

 

0 . 1uF

 

 

 

 

 

 

 

 

 

 

 

 

16V

 

 

 

 

 

 

 

 

 

 

 

 

RGB_DDC_SCL

 

 

 

 

 

 

 

 

 

 

 

 

RGB_DDC_SDA

 

 

 

 

 

 

 

 

C1127

C1128

R1141

 

 

 

 

 

 

 

 

 

18pF

18pF

22

R1143

 

 

 

 

 

 

 

 

50V

50V

 

22

 

+3.5V_ST

 

 

 

 

 

 

 

 

 

 

HEAD_PHONE

 

 

 

 

 

 

 

 

 

 

 

 

Q1105

 

 

 

 

 

 

 

 

 

 

 

MMBT3906(NXP)

 

 

 

 

 

 

 

 

 

 

 

C

E

 

 

 

DSUB_VSYNC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DSUB_HSYNC

 

 

 

 

 

 

OPT

 

B

 

 

 

 

 

 

C1126

 

OPT

D1116

 

 

 

 

 

C1122

D1109

D1113

5.6V

 

 

C

 

 

68pF

D1114

 

R1129

 

 

68pF

20V

 

 

20V

5.6V

200pF

 

 

 

 

 

 

50V

 

3.3K

 

B

 

50V

10pF

 

10pF

200pF

 

 

 

SIDE_HP_MUTE

 

OPT

 

 

HEAD_PHONE

 

Q1106

OPT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MMBT3904(NXP)

 

 

 

 

 

 

 

 

 

 

 

E

HEAD_PHONE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DSUB_B+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D1110

 

 

 

 

 

 

 

 

 

R1133

 

 

20V

 

 

 

 

 

 

 

 

 

75

 

 

10pF

 

 

 

 

 

 

 

 

 

 

 

RGB_ZENER

 

 

 

 

 

 

 

 

DSUB_G+

 

 

 

 

 

 

 

 

 

 

 

 

R1135

 

 

D1111

 

 

 

 

JK1105

 

 

L1100

 

 

CIS21J121

 

 

120

R1105

R1106

 

2K

2K

 

1/8W

1/8W

C1117

5%

5%

22uF

 

 

 

 

16V

NC

OUT_2

OUT_1

FLG

EAN61849601

 

 

 

IC1103

 

 

 

AP2191DSG

 

 

 

8

GND

 

 

1

 

+5V_USB

$ 0 . 077

IN_1

 

 

7

2

 

 

 

 

C1111

C1112

 

IN_2

10uF

6

3

10V

0 . 1 u F

 

EN

 

+3.3V_Normal

5

4

 

 

 

 

 

R1113

 

 

 

4.7K

 

 

 

OPT

 

 

 

USB1_CTL

 

 

R1112

 

R1109

 

10K

 

 

 

 

47

 

 

 

 

 

 

USB1_OCD

75

20V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RGB_ZENER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+3.3V_Normal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1146

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DSUB_DET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1147

DSUB_R+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPT

1K

 

D1112

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D1117

 

R1137

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5.6V

 

20V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

200pF

 

10pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RGB_ZENER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED GND

GND 2

RED

GREEN GND

DDC DATA

GREEN

BLUE GND

H SYNC

BLUE

NC

V SYNC

GND 1

SYNC GND

DDC CLOCK

DDC GND

 

 

 

-010

 

11

 

 

12

 

 

13

 

 

14

 

 

15

SHILED

 

LG-H -ZC

USB

1

 

-3453AU04S-

DOWNSTREAM

234

SIDE_USB_DM

 

 

 

SIDE_USB_DP

 

 

5

D1100

 

 

RCLAMP0502BA

 

 

 

 

 

 

OPT

SPDIF OPTIC JACK

5 . 1 5 M s t a r C i r c u i t A p p l i c a t i o n

 

 

 

 

 

 

 

 

 

+3.3V_Normal

 

 

 

 

 

 

JK1103

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2F01TC1-CLM97-4F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

1

c

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

2

itp O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

reb iF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIN

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPDIF_OUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C1109

 

 

C1110

 

 

 

C1131

 

 

C1121

 

4

 

 

 

 

 

 

 

 

 

R1104

 

 

22uF

 

 

10uF

 

 

 

0 . 1 u F

 

 

100pF

 

 

 

 

 

 

 

 

 

 

 

 

10K

 

 

16V

 

 

16V

 

 

 

16V

 

 

50V

 

SHIELD

 

 

OPT

 

 

OPT

 

 

OPT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

JK1104

SPG09-DB

6

7

8

9

10

16

 

 

1

 

2

3

4

5

PC AUDIO

 

 

 

 

JK1102

 

 

 

 

 

PEJ027-04

 

 

 

 

 

3

E_SPRING

 

 

 

 

6A

T_TERMINAL1

 

 

 

 

 

 

 

 

 

 

B_TERMINAL1

 

 

R1107

 

7A

 

 

15K

PC_R_IN

 

 

OPT

 

 

 

R_SPRING

C1107

 

 

4

D1101

R1102

R1110

 

 

5.6V

100pF

10K

 

 

50V

470K

 

 

200pF

 

5

T_SPRING

 

 

 

 

 

 

 

 

 

 

 

 

 

B_TERMINAL2

 

 

R1108

 

7B

 

 

15K

PC_L_IN

 

 

OPT

 

 

 

T_TERMINAL2

C1108

R1103

 

6B

D1102

R1111

 

 

5.6V

100pF

470K

10K

 

 

200pF

50V

 

 

THE USB_DIODESSYMBOL 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.

EMEA INTERACTIVE

 

 

 

 

 

 

 

GP4_MSTAR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2011 . 08 . 21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERFACE

 

 

 

 

 

 

 

 

 

 

 

 

1 1

2 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copyright © 2012 LG Electronics. Inc. All rights reserved.

LGE Internal Use Only

Only for training and service purposes

 

Page 26 Page 28
Image 27
Page 26 Page 28
Contents http//biz.lgservice.com READ THE SAFETY PRECAUTIONS IN THIS MANUALhttp//aic.lgservice.com http//eic.lgservice.comSPECIFICATION CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONSIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSRemoval IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement3. Test method SPECIFICATION4. Model General Specification 1. Application rangeHDMI1-DTV/DVI RGB InputRGB-PC AnalogD-SUB 15PIN5. Video resolutions 2D 5.1. Component Input Y, CB/PB, CR/PR5.2. RGB Input PC PCDVI 5.3. HDMI InputPC/DTV1. Application Range ADJUSTMENT INSTRUCTIONBoot file Download After downloading, have to adjust Tool Option again3.2. Function Check 4. Total Assembly line process4.1. Adjustment Preparation 3.1. ADC ProcessManual W/B process using adjust Remote control 4.4. EDID data4.2. DDC EDID Write RGB 128Byte 4.3 DDC EDID Write HDMI 256Byte4.6.2. HI-POT auto-check 4.5. Outgoing condition Configuration4.6. HI-POT Test 4.6.1. HI-POT auto-check preparation5.3. Method & notice 5.1. Signal Table5. Model name & Serial number D/L 5.2. Comand Set6.1. Download Procedure 6. CI+ Key Download methodCI+ Key Value Half BLOCK DIAGRAMS7LR All rights reservedEXPLODED VIEW Copyright 2012 LG Electronics. Inc. All rights reserved EMEA INTERACTIVEGP4MSTAR 2011 . 08OLED THERMAL Step Up regulator 3 . 3V to 5VMAX 250mA+3.3VNormal FROM LIPS & POWER B/DPowerDET +1.5VDDRNTP-7500L IC501CONTROL IR & LED MIRROR Pol - change 51Pin LVDS Connector30Pin LVDS Connector For HD 60HzNormal For FHD 60/120HzSIDEHDMI HDMI1For CEC HDMI20 . 3 3 u F USBDIODES RGB/SPDIF/PC/HP/USBS7LRDIVXMS10 W25Q80BVSSIG IC1300MX25L8006EM2I-12G IC1300-*1P4RGLOBALTUNERBLOCK SI2176ATSC1INPUTHSI2156DVB1INPUTH IC1501 LGDT1001PILG1001 A2 Full Scart/ Comp1 EXTSPK OUT UART/I2C SWITCHEXTSPK AMP EXTSPKCONTROL/DEBUGREAL TIME CLOCKRTC EXTERNALPOWER OUT 5V/12VOption name of this page CI SLOT because of Hong Kong CI RegionSMD GASKET Page 1. Trouble Shooting Contents of LCD TV Standard Repair ProcessA2 Check Power Board 24V,12V,3.5V output A. Video errorMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable LCD TVBoard voltages of PowerCheck various No VideoSignal strength Normal over 30% Signal Quality Normal over 30% A. Picture ProblemBy using Digital signal level meter By using Diagnostics menu on OSD Menu→Setup→Manual TuningLink Cable Check color by input -External Input COMPONENT -RGB※ Check and replaceCheck color condition by input -External Input -Component RGB Connect other external device and cableExternal device screen error-Color error Vertical/Horizontal bar, residual image, light spotCheck Power On ‘”High” B. Power errorStand-By Red Operating white Check Power LEDPOWEROFFCPUABNORMAL Check Power Off Starusinstart menuIf Power Off mode is not displayed Check Power B/D voltage POWEROFFABNORMAL1Check audio B+ C. Audio errorPower Board Check user menu Speaker offCheck audio B+ Voltage 20V or In case of External Input signal error Check and fix external deviceOutput signal D. General Function Problem1. Remote controlR/C operating error Check & Repair Cable connection Connector solderS/W Version D. Function errorCheck input signal Y Check technical Signal information input? - Fix informationIdentify nose type E. NoiseF. Exterior defect Standard Repair Process Detail Technical Manual A. Video errorVideo error, video lag/stopMENU -Æ red keycustomer support -Æ signal test -Æ select channel When the signal is strong, use the attenuator -10dB, -15dB, -20dB etcVersion 1. Checking method for remote controller for adjustmentPress the IN-START with the remote controller for adjustment ALL MODELSYou can view 6 types of patterns using the ADJ Key A. Video errorColor errorAppendix Exchange T-Con Board Appendix Exchange T-Con Board No picture/Sound Ok A - 3/5 Appendix Exchange PSULED driverNo Light Dim LightPress damage Appendix Exchange the ModuleUn-repairable Cases In this case please exchange the module Panel Mura, Light leakageUn-repairable Cases In this case please exchange the module Entry method 1. Press the IN-START button of the remote controller for adjustment2. Check the entry into adjustment item B. Power error Off when on, off whiling viewing2. Select the AUDIO function of the Menu C. Audio errorNo audio/Normal video1. Press the MENU button on the remote controller Checking method
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