LG Electronics 29LN46**-Z*

Only for training and service purposes

1. Check tuner(TU6401 #5 #32 ) Power 3.3V

2. Check IC 2405 output voltage

1. Check tuner(TU6401 #7)Power 1.8V

2. Check IC6403 output voltage(1.8V)

Replace IC2405

Replace IC6403

Check Tuner(TU6401) I2C signal

#3 # 4 #34 #35

Check Tuner(TU6406)

DATA, CLK, SYN, VAL

Replace TU6406

And recheck

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, Cb/Pb, Cr/Pr) 6. HDMI Input 6.2. PC mode 6.1. DTV 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 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. HDMI1 4.1.2. HDMI2 4.2. White Balance Adjustment 4.2.1. Overview 4.3. Magic Motion Remote control test 4.4. 3D function test 4.5. HDMI ARC Function Inspection 4.6. Wi-Fi Test 4.7. LNB voltage and 22KHz tone check 4.8. Option selection per country 4.8.1. Overview 5. Audio 6. USB S/W Download(Service only) * After downloading, have to adjust Tool Option again. TROUBLE SHOOTING GUIDE Page Page Page EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS IC100 AT24C256C-SSHL-T 20120813 LCD-TV Port was changed !!!! HDCP EEPROM NVRAM Close to eMMC Flash (IC8100) LVDS [31Pin LVDS OUTPUT Connector] FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS DECAP FOR SOC Rework (BOTTOM)DECAP FOR SOC (HIDDEN - UCC) IC701 K4B4G1646B-HCK0 IC702 Renesas MICOM POWER_ON/OFF2_4 1 0 For Debug USB Interface AV/COMPONENT REAR HP OUT Ethernet Block HDMI NORMAL RS-232C Control INTERFACE DVB-S2 LNB Part Allegro Ouput trace widths should be sized to conduct at least 2A 3A (Option:LNB) 5A +1.2V MTK CORE 6 8 +3.5V_ST 3A PLACE AT MAIN SOC SIDE PLACE AT IC6000 PLACE AT JACK SIDE 7 8 SCART/CI SLOT FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS TU6400 TDSS-H501F(B) Tuner TUNER MULTI-OPTION 8 8 close to TUNER DEMOD_TSSYNC Ext_TS_Sync