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LG RZ-15LA70 - User Manual

LG RZ-15LA70
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R
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : ML-041B
MODEL: RZ-15LA70(RZ-15LA70 Rev A)
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
*( ) ID LABEL Model No.
*Same looking with new chassis
*Issue Date; 2004. 06

Questions and Answers

  • A
    Amber ThomasAug 10, 2025
    How to troubleshoot no power on LG RZ-15LA70 LCD TV (LED indicator off)?
    • N
      nhoffmanAug 10, 2025
      If your LG LCD TV has no power and the LED indicator is off, try the following: check for a short in the main B/D, check the 15V or 5V, change the Lips of Lips Fail, check the output of Change Q1100, check the output of Change IC1107, IC1104 IC1107, IC104, check the LED Assy and change the LED Assy, check P1100, P210 Connector.
  • D
    Donna AlvarezAug 15, 2025
    What to do if my LG RZ-15LA70 has no raster?
    • F
      fgarciaAug 15, 2025
      If your LG LCD TV shows no raster, try the following steps: check the LED status, check and change L900, L901, L902, L903, check the input and change IC901, change the inverter and check the inverter connector or inverter, change the panel link and check the panel link cable or module, check the input source cable and jack and change module.
  • D
    Donald RobinsonAug 22, 2025
    Why is there no raster on component signal on my LG RZ-15LA70?
    • H
      hector44Aug 22, 2025
      If your LG LCD TV has no raster on component signal, check the signal of JA1200 or L1200, L1202, L1203. Try re-soldering or checking the input/output and change the defect part, output of IC1. Also, try re-soldering or checking the input/output of IC800, IC851. Additionally, re-solder or check the input/output and change the defect part, output of IC901. Finally, check the input source cable and jack.
  • B
    Blake GrahamAug 28, 2025
    What to do if there is no raster on AV signal on my LG LCD TV?
    • A
      Amber HillAug 28, 2025
      If there is no raster on AV Signal or TV(RF) signal (Video, S-Video) on your LG LCD TV, check the 5V, 33V of TU1000. Also, check the signal of and change L1209, L1210, L1212. Re-solder or check the input/output and change the defect part of IC1. Check the input/output and re-solder of IC800, IC851. Re-solder or check the input/output and change the defect part of IC901. Finally, check the input source cable and jack.
  • M
    morgansamanthaSep 3, 2025
    Why is there no sound on my LG RZ-15LA70 LCD TV?
    • R
      Ralph ParrishSep 3, 2025
      If your LG LCD TV has no sound, you can try the following: check the source input, re-solder or check the input/output and change the defect part of IC1, check the input/output and re-solder of IC100, IC101, check the speaker and change the speaker, check the speaker wire.

Summary

General Safety Precautions

Safety Part Replacement

Essential safety parts must be replaced with specified components to prevent hazards.

Servicing Safety Procedures

General Servicing Guidelines

Unplug receiver before servicing, test high voltage with meter, avoid spraying chemicals.

Component Replacement Procedures

Display Timing Chart

TV Adjustment Instructions

Auto Gain;Offset Adjustment Procedure

Details procedures for RF and PC mode gain/offset adjustments.

SVC Remote Control Functions

SVC Remote Key Functions

Detailed explanation of each button's function on the SVC remote control.

Troubleshooting Guide (No Power)

No Power Troubleshooting Process

Troubleshooting flowchart for issues where the TV has no power or the LED is off.

Troubleshooting Guide (No Raster)

No Raster Troubleshooting Process

Troubleshooting flowchart for display issues when no raster is present.

Troubleshooting Guide (Component No Raster)

Component Signal No Raster Troubleshooting

Troubleshooting for no raster specifically with component video signals.

Troubleshooting Guide (AV;RF No Raster)

AV Signal No Raster Troubleshooting

Troubleshooting steps for no raster with AV (Video, S-Video) inputs.

TV(RF) Signal No Raster Troubleshooting

Troubleshooting steps for no raster with TV (RF) signals.

Troubleshooting Guide (No Sound)

No Sound Troubleshooting Process

Troubleshooting flowchart for problems related to the absence of sound.

System Block Diagram

Replacement Parts List - Main Board

Main Board Components List

Lists replacement capacitors and resistors for the main board.

Diodes Replacement List

Lists replacement diodes with part numbers and specifications.

Replacement Parts List - Capacitors & Diodes

Capacitor and Diode List

Continues listing replacement capacitors and diodes with detailed specifications.

Replacement Parts List - ICs, Inductors, Transistors, Resistors

Integrated Circuit (IC) Replacement List

Lists replacement ICs with part numbers and technical specifications.

Resistor Replacement List

Lists replacement resistors with part numbers and specifications.

Replacement Parts List - Resistors & Jacks

Replacement Parts List - Additional Components

Circuit Schematics

IC1 VCT49 xyF Schematic Diagram

Circuit diagram for IC1, the VCT49xyF component.

IC500 TC90465 F Schematic Diagram

Circuit diagram for IC500, the TC90465F component.

IC851 M52758 FP Schematic Diagram

Circuit diagram for IC851, the M52758FP component.

IC901 GM5221 Schematic Diagram

Circuit diagram for IC901, the GM5221 component.

Audio and AV Schematics

Audio Amplifier Schematic Diagram

Circuit diagram detailing the audio amplification stage.

AV Board Schematic Diagram

Circuit diagram for the television's AV input/output board.

LG RZ-15LA70 Specifications

General IconGeneral
Screen Size15 inches
Display TechnologyLCD
Aspect Ratio4:3
Resolution1024 x 768
Brightness450 cd/m²
Contrast Ratio500:1
Response Time16 ms
Power Consumption45 W
Input PortsS-Video

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