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LG Electronics 42LT660H-ZA REAL TIME CLOCK(RTC), EXTERNAL_POWER OUT 5V/12V

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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.

M41T83RMY6F

IC1801

3

NF_2

2

NF_1

4

NC_2

1

NC_1

6

DU

5

RST

7

SQW

8

VBAT

9

VSS 10 SDA

11 SCL

12 IRQ1/FT/OUT

13 NC_3

14 IRQ2

15 VCC

16 NF_3

17 NV_4

18 NC_4

CLOCK_SDABATTERY

BA1800

12

+3.5V_ST

+3.5V_ST

33

R1807

1K

R1801

+3.5V_ST

22uF

16V

OPT

C1811

CLOCK_SCL

33

R1808

10K

OPT

R1814

EXT_5V

0.1uF

50V

POWER_OUT

C1807

150K

POWER_OUT

R1802

1/16W

270K

1%

POWER_OUT

R1816

3.3uF

50V

POWER_OUT

C1810

1/8W

200K

1%

POWER_OUT

R1809

EXT_12V

22uF

25V

POWER_OUT

C1806

1/16W

20K

1%

POWER_OUT

R1815

MBRA340T3G

POWER_OUT

D1800

+24V

22

POWER_OUT

R1810

100K

POWER_OUT

R1804

0.1uF

50V

POWER_OUT

C1812

22UH

POWER_OUT

L1802

+12V

1/16W

10K

1%

POWER_OUT

R1817

THERMAL

MP4460DQ-LF-Z

POWER_OUT

IC1802

3

EN

2

SW_2

4

COMP

1

SW_1

5

FB 6GND

7FREQ

8VIN_1

9VIN_2

10 BST

11

EP_GND

0.1uF

50V

POWER_OUT

C1803

18K

POWER_OUT

R1800

2.4K

POWER_OUT

R1821

200

POWER_OUT

R1822

100K

POWER_OUT

R1823

0.1uF

16V

OPT

C1815

100

POWER_OUT

R1806

1/16W

1.2K

POWER_OUT

R1819

EXT_PWR_DET

CB3216PA501E

POWER_OUT

L1800

43

POWER_OUT

R1820

+12V

EXT_12V

0.1uF

50V

POWER_OUT

C1817

EXT12V_CTRL

MP5000DQ

POWER_OUT

IC1803

3

ENABLE/FAULT

2

DV/DT

4

I-LIMIT

1

GND

5

NC 6SOURCE_1

7SOURCE_2

8SOURCE_3

9SOURCE_4

10 SOURCE_5

11

VCC

1K

POWER_OUT

R1818 CB3216PA501E

POWER_OUT

L1804

THERMAL

TPS54327DDAR

IC1800

POWER_OUT

3

VREG5

2

VFB

4

SS

1

EN

5GND

6SW

7VBST

8VIN

9

[EP]GND

0.1uF

50V

POWER_OUT

C1805

12K

1%

POWER_OUT

R1805

BLM18PG121SN1D

POWER_OUT

L1803

22uF

16V

POWER_OUT

C1808

56K

1%

POWER_OUT

R1811

3300pF

50V

POWER_OUT

C1801

NR8040T3R6N

3.6uH

POWER_OUT

L1801

11K

1%

POWER_OUT

R1812

1uF

10V

POWER_OUT

C1800

10K

POWER_OUT

R1813

22uF

16V

POWER_OUT

C1804

100pF

POWER_OUT

C1814

+12V

EXT5V_CTRL

EXT_5V

10uF

25V

C1816

POWER_OUT

150pF

50V

POWER_OUT

C1802

0.1uF

16V

C1809

470pF

50V

POWER_OUT

C1813

D1801

A2

C

A1

APX803D29

POWER_OUT

IC1804

1

GND

3

VCC 2RESET

REAL TIME CLOCK(RTC)

close to pin

Switching noise reducing [MPS recommend]

EXTERNAL_POWER DETECTION

EXTERNAL_POWER OUT 5V/12V

$0.21

EMEA INTERACTIVE

GP4_MSTAR 2011.08.21

EXT_POWER 19 20

Vout=(1+R1/R2)*0.765=5.03V

close IC1800

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

Only for training and service purposes

LGE Internal Use Only

Contents

Main Page SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE General Guidance Before returning the receiver to the customer, Leakage Current Cold Check(Antenna Cold Check) SERVICING PRECAUTIONS Page SPECIFICATION 1. Application range 2. Requirement for Test 3. Test method 4. Model General Specification Page 5. Video resolutions (2D) 5.1. Component Input (Y, CB/PB, CR/PR) 5.2. RGB Input (PC) 5.3. HDMI Input(PC/DTV) ADJUSTMENT INSTRUCTION 1. Application Range 2. Designation 3. Main PCB check process * Boot file Download 4. Total Assembly line process 4.1. Adjustment Preparation * Auto-control interface and directions * Manual W/B process using adjust Remote control. 4.2. DDC EDID Write (RGB 128Byte ) 4.3 DDC EDID Write (HDMI 256Byte) 4.4. EDID data 4.4.1. Auto Download 4.4.2. Manual Download 4.5. Outgoing condition Configuration 4.6. HI-POT Test 4.6.1. HI-POT auto-check preparation 4.6.2. HI-POT auto-check 4.6.3. Checkpoint 5. Model name & Serial number D/L 5.1. Signal Table 5.2. Comand Set 5.3. Method & notice * Manual Download(Model Name and Serial Number) 6. CI+ Key Download method 6.1. Download Procedure + Key Value S7LR BLOCK DIAGRAM Tuner IC1902 Pro:Idiom S7LR IC1902 S001D) TU3702 51P 30P EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS LGE2112-T8 EMEA INTERACTIVE PM MODEL OPTION I2C FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS LGE2112-T8 2 20 EXTERNAL SPEAKER OUT DSUB FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS +5V_ST Step Up regulator 3.3V to 5V(MAX 250mA) IC301 +5V_ST +1.5V_DDR +3.3V_Normal +2.5V/+1.8V S7LR core 1.2V volt FROM LIPS & POWER B/D NTP-7500L IC501 2 20 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS EMEA INTERACTIVE AUDIO AMP IR & LED FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 6 20 CONTROL EMEA INTERACTIVE IR/CONTROL FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS [51Pin LVDS Connector] (For FHD 60/120Hz) [30Pin LVDS Connector] (For HD 60Hz_Normal) 7 20 EMEA INTERACTIVE LVDS WAFER Pol-change FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS HDMI_1 8 20 HDMI_2 For CEC FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS RS232C_9PIN RS232C EMEA INTERACTIVE 10 20 RGB/SPDIF/PC/HP/USB RGB PC EARPHONE BLOCK EMEA INTERACTIVE INTERFACE 11 20 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS CLose to DDR3 LGE2112-T8 H5TQ1G63DFR-H9C IC1201 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC1300 IC1300-*1 W25Q80BVSSIG MX25L8006EM2I-12G P4R_GLOBAL_TUNER_BLOCK close to TUNER EMEA INTERACTIVE TUNER 14 20 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS PI_LG1001 IC1501 LGDT1001 BUFFER/LINE DRIVER PLL VOLTAGE_ONOLY F4/G4 Full Scart/ Comp1 COMPONENT2 EMEA INTERACTIVE REAR JACK 16 20 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS UART/I2C SWITCH EXT_SPK_CONTROL/DEBUG EXT_SPK OUT EXT_SPK AMP UART_SW1 REAL TIME CLOCK(RTC) IC1800 TPS54327DDAR EXTERNAL_POWER OUT 5V/12V $0.21 * Option name of this page : CI_SLOT CI Region (because of Hong Kong) CLOSE TO MSTAR EMEA INTERACTIVE PCMCI 19 20 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS SMD GASKET EMEA INTERACTIVE SMD_GAS 20 20 Page Contents of LCD TV Standard Repair Process 1. Trouble Shooting date Revis ed date 1/13 symptom A. Video error No video/ Normal audio First of all, Check whether all of cables between board is inserted properly or not. (Main B/DPower B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) 1 A4 A. Picture Problem Color error date Revis ed date 4/13 Vertical/Horizontal bar, residual image, light spot Vertica l / Horizontal bar, residual image, light spot, external device color error External device screen error-Color error device and cable date Revis ed date 5/13 B. Power error Off when on, off while viewing, power auto on/off A19 A22 date Revis ed date 7/13 C. Audio error No audio/ Normal v ideo A24 A25 date Revis ed date 8/13 8 C. Audio error Wrecked audio/ discontinuation/noise date Revis ed date 9/13 A25 9 D. General Function Problem 1. Remote control(R/C) operating error A4 10 D. Function error E. Noise F. Exterior defect Page Page Page Appendix : Exchange T-Con Board (1) Appendix : Exchange T-Con Board (2) Page Page Appendix : Exchange the Module (2) Un-repairable Cases In this case please exchange the module. Page Checking method