LG Electronics 42LA86**, 42LA86**-Z* Menu Option LG Logo Light

Standard Repair Process Detail Technical Manual

Check front display LED

B. Power error _No power

A17

Established

date

Revised

date

Error

symptom

Content

LCD TV

LOGO LED

Front LOGO LED control in the status of

ST-BY Condition:

Menu  Option  LG Logo Light

 Brightness(OFF,LOW,MIDDLE,HIGH)

2012. 12 .06

You can set the LG Logo Light

to on or off by selecting OPTION

in the main menus.

Front LOGO LED control in the status of

Power On Condition:

Menu  Option  LG Logo Light

 Duration(off, off after10min)

Contents

Main CONTENTS 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. External input format 5.1. 2D Mode 5.2. 3D Mode (4) HDMI 1.4b (3D supported mode automatically) Page Page ADJUSTMENT INSTRUCTION 1. Application Range 2. Designation 3. Automatic Adjustment 3.1. ADC Adjustment 3.3. LAN Inspection 3.3.1. Equipment & Condition 3.3.2. LAN inspection solution 3.3.3. WIDEVINE key Inspection 3.4. LAN PORT INSPECTION(PING TEST) 3.6. Model name & Serial number Download 3.6.1. Model name & Serial number D/L 3.6.2. Method & notice 3.7. CI+ Key checking method 3.7.1. Check the method of CI+ Key value 4. Manual Adjustment 4.1. EDID(The Extended Display Identific ation Data)/DDC(Display Data Channel) download 4.1.1. Overview 4.1.2. Equipment 4.1.3. Download method 4.2. White Balance Adjustment 4.2.1. Overview 4.2.2. Equipment 4.2.3. Equipment connection MAP 4.2.4. Adj. Command (Protocol) 4.2.5. Adj. method 4.2.6. Reference (White balance Adj. coordinate and color temperature) 4.2.7. EDGE LED White balance table 4.3. Local Dimming Function Check 4.4. Magic Motion Remote control test 4.5. 3D function test 4.6. Wi-Fi Test 4.7. LNB voltage and 22KHz tone check 4.8. Inspection of light scattering 4.9. Option selection per country 4.9.1. Overview 5. Audio 6. USB S/W Download(Service only) * After downloading, have to adjust Tool Option again. EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC102 R1EX24256BSAS0A I2C PULL UP Model Option IC100 LG1154D_H13D NVRAM Debug INSTANT_MODE0 System Configuration LG1154A (2) AFE 3CH Power +2.5V +3.3V_Bypass Cap (1) LG1154A +1.1V_Bypass Cap +0.75V LG1154D BSD-NC4_H002-HD 2012-12-24 LG1154DLG1154A DIMMING NC Placed as close as possible to IC4300 AFE 3CH REF Setting FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC500 2012-09-14 1Gbit : T7(NC_6) H5TQ1G63DFR-PBC(x16) FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS BSD-NC4_H007-HD 2012-10-20 PCMCIA FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS POWER IC2302 AP7173-SPG-13 HF(DIODES) 5A LG1154 IC2300 TPS54327DDAR +5.0V normal & USB DCDC_TI Renesas MICOM THERMAL 87 AVDD12_3 HDMI3 HDMI4 FHD FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS GP4 IC3201 SII9587CNUC HDMI3 COMPONENT 1 PHONE JACK FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS JACK HIGH/MID 2012.10.09 SPDIF OUT BSD-NC4_H034-HD MAX 0.4A For EMI FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC4200 GL852G-31 CAMERA POWER ENABLE CONTROL USB3_HUB 2012.10.08 USB_Camera OCP USB1 OCP USB2/3 USB2 (2.0) MAX 1.0A USB3 (2.0) MAX 1.0A USB1 (3.0) MAX 1.2A BSD-NC4_H044-HD 2012-11-09 USB JACK FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS Full Scart(18 Pin Gender) BSD-NC4_H048-HD 50 LAN_VERTICAL 2011.12.09 Ethernet Block FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC5200 RTL8201F-VB-CG WOL POWER ENABLE CONTROL ETHERNET Ethernet Block BSD-NC4_H052-HD 2012-09-12 IC5600 TAS5733 Close to Speaker SPEAKER_L GP4_MT5369 58 2011.11.21 AUDIO[ST] Separate DGND AND AVSS This parts are Located on AVSS area. WOOFER_R GP4_MT5369 58 2011.11.21 AUDIO[ST] This parts are Located on AVSS area. Close to Speaker FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC6000 AZ4580MTR-E1 [SCART AUDIO MUTE] SCART AUDIO AMP 2011.11.21 60 EARPHONE AMP 62 CI SLOT 2011.10.31 CI POWER ENABLE CONTROL IC6300 TDA8024TT +5V_NORMAL B-CAS (SMART CARD) INTERFACE FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IF_P 13 20 32 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS TU6705 TDSN-G351D TU_SYMBOL 2012.09.14 TU6702 TDSQ-H651F(B) TU6703 TDSQ-G651D(B) DVB-S2 LNB Part Allegro Max 1.3A (Option:LNB) 2A 3A LVDS BSD-NC4_H072-HD 2012-10-15 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS LOCAL DIMMING 2012.09.14 LOCAL DIMMING 1 [To LED DRIVER] BSD-NC4_H074-HD FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC7701 <LEVEL SHIFTER BLOCK> CH6 CH5 CH4 <POWER BLOCK> THIS IS REVERSE PATTERN !!!! Page FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC8100-*3 KLM2G1HE3F-B001 (Just Interal LDO Capacitor) eMMC eMMC I/F eMMC serial 100 ohm option Page Page EPI Interface EPI(Embedded Point-Point Interface) EPI Interface (mini-LVDS vs. EPI) Comparison -Multiple number of wires needed for higher bandwidth EPI (Embedded clock P-to-P Interface) HF mini-LVDS EPI Interface (mini-LVDS vs. EPI) Fewer Lines : 12 NFC (Near field communication) xxLA790V-Zx PCB P/No : EAX65040103 xxLA860V-Zx PCB P/No : EAX65040103 xxLA960V-Zx Chassis : LD34D 1. H13 Block Diagram (External) H13 LG1154AN H13 LG1154D I2C_SDA1 LNB 2. LG1154 I2C Map 3. Power Block Diagram 3.5V 12V 24V 4. Tuner/CI Block Diagram LG1154 /PCM_IOWR /PCM_IRQA TDSQ- G651D 5. Video & Audio IN H13 SC_L/R_IN (LG1154AN) COMP2_Y_IN_SOC_SOY 6. AUDIO OUT TAS5733 MICOM AZ4580MTR MAIN 4P wafer 7. HDMI HDMI1 H13D (IC100 / LG1154D) 8. Panel Interface Block Diagram EPI_LOCK6_SOURCE VCOM_LOOP 37 VGH_F/R 9. PMIC & Level Shift Bloc Diagram 10. USB / WIFI / M-REMOTE / UART LG1154D_H13D OCP OCP /USB_OCD1 47LA790V-ZA Page LED driver / PSU 55LA860V-ZA Page 60LA860V-ZA LED driver 14 Pin cable Page 47LA960V-ZA LED driver 14 Pin Cable Page Page 1. System Pairing Information Transmission (Send to TV after Paired) The receiver sends the pairing success packet to TV directly. Voice Data Transmission 2. Remote Buttons (M4 vs. MR13P) RF_CODE M4 Remote MR13P Remote IR_CODE repeat 3. MR13P Block Diagram Power Management Connector 4. Function list 5. RF Pairing / Un-pairing Method Method Description Page WIFI Built in assy feature - Pin map Block diagram Page Contents of LCD TV Standard Repair Process C. Audio error First of all, Check whether there is SVC Bulletin in GCSC System for these model. Contents of LCD TV Standard Repair Process Detail Technical Manual Continue to the next page Check Power Board or module N Always check & record S/W Version and White LCD TV symptom A. Video error No video/ Normal audio (Main B/D Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) A7 & A3 A4 A1 A2 A4 A. Picture Problem A6 A7 . By using Digital signal level meter . By using Diagnostics menu on OSD A. Picture Problem (DVB-S/S2) A6 A7 S/W Upgrade Normal A. Video error Color error A10/ A11 A12 A8 Vertical/Horizontal bar, residual image, light spot Vertical / Horizontal bar, residual image, light spot, external device color error For other panel For LGD panel normal? B. Power error No power Close A4 A18 B. Power error Off when on, off while viewing, power auto on/off A19 Check Power Off A22 C. Audio error A24 A25 LCD TV abnormal audio/discontinuation/noise is same after Check input signal compared to No audio C. Audio error 2012. 12 .06 A25 symptom Revised date D. General Function Problem Remote control & Local switch checking A27 Y A4 D. Function error symptom LCD TV E. Noise LCD TV Zoom part with F. Exterior defect symptom A28 LCD TV G. Network Error LCD TV - Check ethernet Port SVC Y G. CI+ Competibility Error LCD TV Check defect CI slot pin Check its worked CI+ 1.2 or 1.3 Setting Antenna CI information Contents of LCD TV Standard Repair Process Detail Technical Manual Continued from previous page audio/discontinuation case of audio error A. Video error_No video/Normal audio LCD TV A. Video error_No video/ Audio 2012. 12 .06 LCD TV Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board Main Board) 5 3.5V 6 PWM Dim #2 Page Page Page A. Video error_Video error, video lag/stop <ALL MODELS> A. Video error_Color error Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) Page Page Page Page Page Menu Option LG Logo Light 24 Pin (Power Board Main Board) Check power input voltage and ST-BY 3.5V Check the DC 24V, 12V, 3.5V. 15 12V 16 24V B. Power error _No power Checking method when power is ON B. Power error _No power LCD TV Check power on pin is high 24 Pin (Power Board Main Board) 1 Power on 2 Inverter On/off Page Checking method C. Audio error_No audio/Normal video LCD TV LCD TV LCD TV