LG Electronics 55LA74**-Z* EXPLODED VIEW

Only for training and service purposes

A22 A10 AT1

AG1 900

200

400

410

540

521

530

120

560

300

570

580

501

312

310

500

301

510

121

LV1 LV2

* Set + Stand

AG2

Dual Play

(Option)

EXPLODED VIEW

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These

parts are identified by in the Schematic Diagram and EXPLODED VIEW.

It is essential that these special safety parts should be replaced with the same components as

recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

Do not modify the original design without permission of manufacturer.

IMPORTANT SAFETY NOTICE

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. Component Video Input (Y, Pb, Pr) 6.2. PC mode 6. HDMI Input 6.1. DTV mode 7. 3D Mode 7.1. HDMI 1.4b (3D supported mode automatically) 7.3. RF Input(3D supported mode manually) 7.4. RF Input (3D supported mode automatically) 7.2. HDMI Input(1.3) 7.5. USB Input (3D supported mode manually) 7.8. Component Input(3D) (3D supported mode manually) 7.6. HDMI-PC Input (3D supported mode manually) 7.7. DLNA Input (3D supported mode manually) 7.9. 3D Input mode ADJUSTMENT INSTRUCTION 1. Application Range 2. Designation 3. Automatic Adjustment 3.1. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L, HDCP14/20 D/L 3.3. LAN PORT INSPECTION(PING TEST) 3.3.1. Equipment setting 3.3.2. LAN PORT inspection(PING TEST) 3.4. Model name & Serial number Download SET PC 4. Manual Adjustment 4.1. EDID DATA 4.1.1. 3D EDID 4.1.2. 2D EDID 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. ALELF & EDGE LED White balance table Page 4.7. LNB voltage and 22KHz tone check 4.8. Option selection per country 4.8.1. Overview 4.8.2. Method 5. Tool Option selection 6. Ship-out mode check(In-stop) 7. GND and Internal Pressure check 7.1. Method 7.2. Checkpoint 9. USB S/W Download(Service only) * After downloading, have to adjust Tool Option again. BLOCK DIAGRAM LGE2122 EXPLODED VIEW IC100 AT24C256C-SSHL-T 8 NVRAM_RENESAS MID_MAIN_1 2011.12.13 HDCP EEPROM I2C Model Option X-TAL NVRAM PLACE AT JACK SIDE 10 DECAP FOR SOC (HIDDEN - UCC) DECAP FOR SOC Rework (BOTTOM) 2011.12.09 MID_MAIN_3 2011.12.30 11 MID_MAIN_SCART PLACE AT JACK SIDE PLACE AT MAIN SOC SIDE PLACE AT IC6000 K4B4G1646B-HCK0 IC701 MT41K128M16JT-125:K K4B4G1646B-HCK0 DDR_512MB_SS IC703 DDR_512MB_SS IC702 13 CI TS INPUT Close to MT5369 Close to MT5398 2011.11.21 MID_MAIN_CI 5A FROM LPB & PSU 24V-->3.48V Power_DET +3.3V_NORMAL Renesas MICOM THERMAL 39 RX2+ DDC_SCL_MHL 38 RX2- FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS R3357 10K UI : HDMI2 UI : HDMI1 SIDE SPDIF SPDIF OUT 37 JACK_COMMON 2011.11.21 38 JACK_COMMON 2011.11.21 UART FOR DEBUG AV/COMPONENT REAR AR4100 100 1/16W M_REMOTE P4100 SMAW200-H12S2 Place Near Micom MAX 0.4A IC4306 TPS2066CDGNR 43 USB2_USB3 2012.7.11 MAX 1.5A OCP USB2/3 USB2 MAX 1.5A USB3 DVR Ready IC4500 BD82020FVJ OCP USB1 USB1 MAX 1.5A Full Scart(18 Pin Gender) JK4600 PSC008-01 46 SCART GENDER 2011.10.26 Ethernet Block FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 0x54 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 TU6600 TDSS-G501D(B) TU6503 TDSM-C601D(B) TU_SYMBOL_EU_M 2012.07.10 66 TU6601 TDSQ-G501D(B) RS-232C Control INTERFACE FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC6900 A8303SESTR-T LNB 2012.03.08 69 DVB-S2 LNB Part Allegro Max 1.3A (Option:LNB) 2A 3A LVDS [41Pin LVDS OUTPUT Connector] [51Pin LVDS OUTPUT Connector] 76 [To LED DRIVER] LOCAL DIMMING FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC7701 2011.12.01 77 <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 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS JAPAN TUNER INTERFACE Page Page CONTENT EPI Interface EPI(Embedded Point-Point Interface) Features Merits 4/ 88 EPI Interface (mini-LVDS vs. EPI) Comparison EPI (Embedded clock P-to-P Interface) HF mini-LVDS What to change Page NFC (Near field communication) Main PCB for Broadband xxLA660S-Zx 1. LGE2122 Block Diagram LGE 2122 IC105 LGE 2122 2. LGE 2122 I2C Block Diagram 3. Power Block Diagram 3.5V 24V 5V USB 3A ) ( 4. Tuner/CI Block Diagram LGE 2122 TDSQ- G501D CI Slot 5. Video/Audio In Block Diagram LGE 2122 JK4600 Jack Side SoC Side JK501 6. Audio Out Block Diagram SPDIF_OUT [ASPDIF0] IC8101 Audio AMP NTP7513 HP_L/ROUT_AMP 7. HDMI SIL1292 TMDS Link 8bits HDMI3 EPI Tx Block LGE 2122 GMA1/GMA3/GAM9/GMA10/GMA16/GMA18 50Pin X 2 8. Panel Interface Block Diagram Page 10. USB / WIFI / M-REMOTE / UART LGE 2122 USB1 OCP Motion Remote Receiver Interconnection - 1 LED driver / PSU [PCBs] [Cables] 47LA660S-ZA Interconnection - 2 [Cables] [PCBs] 47LA660S-ZA Introductions of 13Y RF assy + Magic Remote control 3. MR13 Block Diagram 1. System Pairing Information Transmission (Send to TV after Paired) The receiver sends the pairing success packet to TV directly. Voice Data Transmission 5 / 88 2. Remote Buttons (M4 vs. MR13) RF_CODE M4 Remote MR13 Remote IR_CODE repeat 3. MR13 Block Diagram Key Button Connector (Knowles) Power Management 4. Function list 5. RF Pairing / Un-pairing Method Method Description at the same time for 5 sec. RF Pairing unpairing. Page WIFI Built in assy feature - Pin map Block diagram Page Widevine & HDCP 2.0 & NETFLX Contents 1. Widevine? dowmload by NSU is impossible.) Widevine Key is unique data stored TV for using Widevine. 2. HDCP 2.0 & NETFLIX? 3. DTCP? [Three cryptographic Keys] 4. Changed BOM As-Was Current 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. 18 / 88 Contents of LCD TV Standard Repair Process Detail Technical Manual Continue to the next page 19 / 88 Check Power Board A7 & A3 LCD TV symptom A. Video error No video/ Normal audio A4 A1 A2 A28 First of all, Check whether all of cables between board is inserted properly or not. 20 / 88 A4 21 / 88 A. Picture Problem A7 A6 . By using Digital signal level meter . By using Diagnostics menu on OSD A. Picture Problem (DVB-S/S2) A7 S/W Upgrade A6 Normal A. Video error A10/ A11 Color error A8 error? Vertical/Horizontal bar, residual image, light spot For other panel For LGD panel Vertical / Horizontal bar, residual image, light spot, external device color error 2012. 12 .06 26 / 88 B. Power error symptom A19 Off when on, off while viewing, power auto on/off and check each 3 C. Audio error No audio/ Normal video A24 A25 Established date Revised date LCD TV C. Audio error symptom Revised date Wrecked audio/ discontinuation/noise Connect and check D. General Function Problem A27 Y A4 Remote control & Local switch checking D. Function error symptom LCD TV 31 / 88 E. Noise LCD TV 32 / 88 Zoom part with A28 F. Exterior defect symptom LCD TV 33 / 88 G. Network Error - Check ethernet Port LCD TV 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 35 / 88 Contents of LCD TV Standard Repair Process Detail Technical Manual audio/discontinuation case of audio error Continued from previous page A. Video error_No video/Normal audio LCD TV 37 / 88 A. Video error_No video/ Audio LCD TV Check the DC 24V, 12V, 3.5V. 24 Pin (Power Board Main Board) Page Page Page 41 / 88 A. Video error_Video error, video lag/stop <ALL MODELS> A. Video error_Color error You can view 6 types of patterns using the ADJ Key Appendix : Exchange EPI Cable or Main B/D (1) Appendix : Exchange EPI Cable or Main B/D (2) Page Page Source TAB IC Defect Appendix : Exchange the Module (2) Un-repairable Cases In this case please exchange the module. ST-BY Condition: in the main menus. Power On Condition: 49 / 88 24 Pin (Power Board Main Board) B. Power error _No power Check the DC 24V, 12V, 3.5V. 50 / 88 Checking method when power is ON Check power on pin is high B. Power error _No power LCD TV 24 Pin (Power Board Main Board) Page Checking method LCD TV LCD TV D. VCOM Adjustment 1. Case 2. Equipment 3. Adjust sequence LCD TV