LG Electronics 28LN45 TROUBLE SHOOTING

Only for training and service purposes

TROUBLE SHOOTING

1. No Power

Check C820 All

Voltage Level (19V)

Check Power connector

OK ? Replace Adapter

N N

Check IC802 output

Voltage Level (12V)

Replace IC802 &

Recheck

Check IC809Output

Voltage Level (3.3V_ST) Replace IC809

Check IC806 Output

Voltage Level (1.15V)

Replace IC806 &

Recheck

Check IC810 Output

Voltage Level (2.5V)

Replace IC810 &

Recheck

Check IC807 Output

Voltage Level (1.5V)

Replace IC807 &

Recheck

Check X201 Clock

24MHz Replace X201

Replace IC100 Flash Memory

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. Timing 5.1. RGB/HDMI (PC) 5.2. HDMI (DTV) 5.3. Component ADJUSTMENT INSTRUCTION 1. Application Range 2. Designation 3. Main PCB check process * Boot le Download 3.1. EDID Process 3.1.1. EDID download 3.1.2. RGB EDID Data 3.1.3. HDMI EDID Data 3.2. Function Check 4. Total Assembly line process 4.1. Tool option & ADC Check 4.2. Model name & Serial number download 4.2.1. Model name & Serial number D/L 4.2.2. Method & notice 4.3. Function Check 4.3.1. Check display and sound 4.3.2. PCMCIA CARD Check 4.3.3. PIP Check 4.3.4 HDMI MHL Function Inspection(HDMI2 Port only) 4.5. DPM Operation check 4.6. Model name & SW version & Adjust check 4.6.1. Model Name& SW Version Check 4.6.2. Adjust Check 4.7. Outgoing condition Configuration TROUBLE SHOOTING 1. No Power 2. No Picture 3. No Video - Digital TV 4. No Video - Component 5. No Video - RGB 6. No Video - HDMI 7. No Audio BLOCK DIAGRAM LGE2121-MS10 Option(Only for DVB) - ATSC: TDSS-H501F (Half NIM) Option EXPLODED VIEW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS AR101 1 13 I2C Internal demod out MEMORY OPTION AB3 MODEL OPTION MODEL_OPT_3 T24 MODEL_OPT_8 LOW FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ETHERNET RS232C(SIDE) 4 13 INTERFACE HDMI HDMI_1 MHL OCP HDMI_2 With MHL CEC IR/LED and Control PIN22 VESA IR_OUT(Ready) JEDIA Headphone block FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS R842 R1 M1 Core H/W Option:FULL_NIM LED DRIVER FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS K4B1G1646G-BCK0 2G 1600 K4B2G1646E-BCK0 DDR 12 13 IC1202 S7LR-M_NON_MS10 CI Region CI HOST I/F CI SLOT 120915 Array->normal resistor * Option name of this page : CI_SLOT NETCAST4.0 EU&CHUNA_TUNER_BLOCK Close to TUNER ERROR & VALID PIN 2013.1.14 LNB 27 13 DVB-S2 LNB Part Allegro EAX65303801 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 28 13 SCART&COMP SCART / COMPONENT&CVBS [SCART AUDIO MUTE] FULL SCART 121118 SCART AMP IC change SCART AMP SCART / COMPONENT&CVBS COMPONENT&CVBS