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LG M227WAP-PMM User Manual

LG M227WAP-PMM
32 pages
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LCD MONITOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LP92C
MODEL : M227WAP
M227WAP-PMM
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
P/NO : MFL63261604(1002-REV00) Printed in Korea
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LG M227WAP-PMM Specifications

General IconGeneral
Screen Size22 inches
Resolution1680 x 1050
Aspect Ratio16:10
Brightness300 cd/m²
Contrast Ratio1000:1
Response Time5 ms
Viewing Angle170°/160°
AudioStereo
Speakers2 x 3W
Input PortsHDMI, DVI-D, Component, Composite

Summary

Servicing Precautions

General Servicing Precautions

General guidelines for safe and correct servicing procedures for the receiver.

Electrostatically Sensitive (ES) Devices

Procedures to prevent damage to components sensitive to static electricity.

General Soldering Guidelines

Guidelines for proper soldering techniques and materials for servicing.

IC Remove/Replacement

Detailed steps for removing and replacing Integrated Circuit components.

Small-Signal Discrete Transistor Removal/Replacement

Procedure for removing and replacing small-signal transistors.

Power Output, Transistor Device Removal/Replacement

Steps for removing and replacing power output transistors.

Diode Removal/Replacement

Procedure for removing and replacing diodes.

Fuse and Conventional Resistor Removal/Replacement

Steps for replacing fuses and conventional resistors.

Circuit Board Foil Repair

Techniques for repairing damaged copper foil traces on circuit boards, including IC and other connections.

Specification

1. Application Range

Defines the applicability of the spec sheet to the LP92C chassis LCD Monitor TV.

2. Specification

Details the test conditions and general specifications for the product.

3. Test method

Outlines the methods used for testing product performance and specifications.

4. Module Specification

Provides detailed specifications for the LCD module (LGD, LM215WF1-TLA1).

5. General Specification

Covers general specifications including TV and PC input modes.

5.1 TV

General specifications related to TV broadcasting and receiving systems.

5.2 RGB - PC

Specifications for RGB input in PC mode, including resolution and operating conditions.

6. Chroma & Brightness

Details the color and brightness specifications of the LCD module.

6.1 M227WDAP – 21.5" LCD Module

Specific chroma and brightness parameters for the M227WDAP module.

7. SET Optical Feature

Optical features for different input modes like PC and DFC.

7.1 PC Mode

Optical features for PC input mode, including luminance and contrast.

7.2 Special feature (DFC)

Details about the DFC special feature for black patterns.

8. Component Video Input (Y, PB, PR)

Specifications for component video input signals and resolutions.

9. RGB Input (PC)

Specifications for RGB input signals in PC mode, including resolutions and frequencies.

10. HDMI Input (DTV)

Specifications for HDMI input signals in DTV mode, including resolutions.

11. Mechanical specification

Details the physical dimensions, weight, and packaging of the unit.

11.1 M227WAP

Mechanical specifications specific to the M227WAP model.

Adjustment Instruction

1. Application

Specifies the application of this adjustment instruction to the LP92C chassis monitor TV.

2. Designation

Details the order of operations, power adjustment, magnetic field, input signal, and reserve time.

3. Adjustment items

Lists the adjustment items for PCB assembly and SET assembly.

4. PCB assembly adjustment method

Describes methods for adjusting PCB assembly, including tool-option and SW download.

4.1 Input Tool-Option, Area Option

Procedure for setting Tool Option and Area Option based on BOM.

4.2 S/W program download

Instructions for downloading the MSTAR firmware using the ISP tool.

4.2.1 Preliminary steps

Steps before downloading software, including download method and connecting jig.

4.2.2 Download Steps

Detailed steps for executing the ISP Tool and downloading the software.

4.3. ADC Process

Describes the process for adjusting Analog-to-Digital Converter (ADC) for PC and component inputs.

4.3.1 ADC calibration

Specific calibration steps for ADC using MSPG-925.

4.3.2 PC input ADC

Procedures for adjusting PC input ADC, including gain/offset and confirmation.

4.3.2.1 Auto RGB Gain/Offset Adjustment

Steps for automatically adjusting RGB gain and offset for PC input.

4.3.2.2 Confirmation

Steps to confirm ADC values in EEPROM after adjustment.

4.3.3 COMPONENT input ADC

Procedures for adjusting component input ADC, including gain/offset.

4.3.3.1 Component Gain/Offset Adjustment

Steps for adjusting gain and offset for component input.

5. EDID

Covers Extended Display Identification Data (EDID) and DDC download procedures.

5.1 Profile

Profile for enabling plug and play functionality via EDID.

5.2 Equipment

Lists the necessary equipment for EDID writing.

5.3 DDC EDID Write (RGB 128Byte)

Procedure for writing EDID data for RGB input using DDC2B protocol.

5.4 DDC EDID Write (HDMI 256Byte)

Procedure for writing EDID data for HDMI input using DDC2B protocol.

5.5 EDID data

Displays EDID data for RGB and HDMI interfaces.

6. HDCP(High-Bandwidth Digital Contents Protection)

Instructions for setting up and downloading HDCP keys for content protection.

7. Adjustment of White Balance

Details the purpose and principles for adjusting color temperature and white balance.

7.1 Purpose and Principle for adjustment of the color temperature

Explains the objective and methodology for color temperature adjustment.

7.2 Connecting diagram of equipment for measuring (For Automatic Adjustment)

Illustrates the setup for automatic white balance adjustment using equipment.

7.3. Adjustment of White Balance for Manual Adjustment

Provides steps for manual adjustment of white balance using a color analyzer.

9. Preset CH write condition

Conditions for writing preset channel information after assembly.

Troubleshooting

1. TV/CATV doesn't display

Troubleshooting flowchart for TV/CATV display issues.

2. AV, Component doesn't display

Troubleshooting flowchart for AV and Component input display issues.

3. RGB-PC doesn't display

Troubleshooting flowchart for RGB-PC input display issues.

4. HDMI doesn't display

Troubleshooting flowchart for HDMI input display issues.

Block Diagram

Exploded View

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