This document is a service manual for an LG Color Monitor, specifically the FLATRON W2486L and W2486L-PFV models, with chassis number LM95A. It provides comprehensive information for servicing, including specifications, adjustment procedures, troubleshooting, and exploded views.
Function Description
The device is a 24-inch LCD color monitor designed for general use, supporting various input signals and offering a range of display features. It integrates smart and user-friendly functions, including OSD (On-Screen Display), DDC2B/DDC-CI for display data channel communication, HDCP (High-bandwidth Digital Content Protection), Control Lock, sRGB color space, f-Engine for image enhancement, ARC (Aspect Ratio Control), RTC (Real-Time Clock), Auto Brightness, Over Scan, Ez Zooming, Photo Effect, and a 4:3 aspect ratio in wide mode. It also includes a headphone out jack and black level adjustment.
Important Technical Specifications
General Specifications:
- Model: FLATRON W2486L / W2486L-PFV
- Chassis No.: LM95A
- Display Size: 24" LCD MONITOR
- Power Cord: 1.87 ± 0.05 M length, wall-out shape, black color.
- Signal Cable (D-SUB): 1.8 ± 0.03 M length, detachable type, black color, 15-Position Sub-miniature D (Triple Row).
- Signal Cable (DVI): 2.0 ± 0.03 M length, detachable type, black color, 18-Position DVI-D (Triple Row).
- Adapter Input: AC100~240V, 50~60Hz, 1.0A Max.
- Module: M240HW01 v1 (P/No: EAJ60678401).
Mechanical Specifications:
- Dimensions (Before Packing): 577.4 mm (W) x 198.4 mm (D) x 440.5 mm (H) with stand; 577.4 mm (W) x 84.1 mm (D) x 430 mm (H) without stand.
- Dimensions (After Packing): 654 mm (W) x 492 mm (D) x 126 mm (H).
- Weight: 4.7 Kg (SET only); 7.2 Kg (with BOX).
- Container Loading Quantity: 684 (Indi.), 576 (Pallet) for 20ft; 1512 (Indi.), 1344 (Pallet) for 40ft.
- Stand: Attachable (Tilt Only), 256.1 mm (W) x 198.4 mm (D) x 26.6 mm (H).
- Tilt Degree: -2°(±2) ~ 15°(±3).
- Tilt Force: 0.8~2.5 kgf.
- Swivel Degree/Force: N/A.
Optical Characteristics:
- Viewing Angle (CR ≥10): Horizontal (R/L) +75°/-75° (min), +85°/-85° (Typ.); Vertical (Top/Bottom) +70°/-70° (min), +80°/-80° (Typ.).
- Luminance: Minimum 180 cd/m², 6500K (Full white pattern, 0.70V); Brightness Uniformity 75% (min).
- Contrast Ratio: 600 (Min), 1000 (Min); DFC > 1,000,000:1 (Min).
- Response Time: On/off: 5ms (TYP); Gray to Gray: 2ms (TYP).
- Light Leakage: Not visible at 300 Lux.
Engineering Specifications:
- Supported Sync. Type: Separate Sync., SOG, Digital.
- Operating Frequency:
- Analog/Digital Horizontal: 30~83kHz, Vertical: 56~75 Hz.
- HDMI Horizontal: 28~83kHz, Vertical: 48~61 Hz.
- Resolution:
- Analog/Digital Max/Recommend: 1920x1080 @ 60Hz.
- HDMI Max/Recommend: 1920x1080 @ 60Hz.
- Input Voltage: 100 – 240 Vac, 50 or 60Hz.
- Inrush Current: Cold Start: 50 A; Hot: 120 A.
- On Mode Power Consumption: 32W (Max), 28W (typ) with RED LED (Test condition: 1920x1080 @ 60Hz, burst pattern, 100~240V, after aging 30min).
- Sleep Mode Power Consumption: 1W (blinking LED).
- Off Mode Power Consumption: 1W (Off LED).
- MTBF: 50,000 HRS with 90% Confidence level.
- Lamp Life: 50,000 Hours (Min).
- Using Altitude: 5,000 m (for Reliability), 3,000m (for FOS).
- Operating Environment: Temperature 10 °C ~ 35 °C, Humidity 10% ~ 80%.
- Storage Environment: Temperature -20 °C ~ 60 °C, Humidity 5% ~ 90% non-condensing.
LCD Panel Characteristic:
- Maker: AUO
- Type: TFT Color LCD Module
- Active Display Area: 24 inches (609.7mm) diagonal (Aspect ratio 16:10).
- Pixel Pitch: 0.2767mm x 0.2767mm.
- Electrical Interface: 2ch-LVDS.
- Color Depth: 16.7M colors (RGB 6-bit + Hi_FRC).
- Size (Outline): 556.0(H) x 323.2(V) x 14.55(D) mm.
- Surface Treatment: Anti-Glare, Hard Coating (3H).
- Operating Mode: Transmissive mode, Normally White.
- Backlight Unit: White LED.
- Rise/Fall Time: Rise Time: 3.4 (Typ), 7.4 (Max); Fall Time: 1.6 (Typ), 2.6 (Max).
- White Color Coordinates: Wx 0.283 (Min), 0.298 (Normal), Typ+0.015 (Max); Wy 0.298 (Min), 0.313 (Normal), Typ+0.015 (Max) for 9300K.
- Red Color Coordinates: Rx 0.635, Ry 0.349 for 6500K.
- Green Color Coordinates: Gx Typ-0.03, 0.335 (Normal), Typ+0.03 (Max); Gy Typ-0.03, 0.607 (Normal), Typ+0.03 (Max) for 6500K.
- Blue Color Coordinates: Bx 0.146, By 0.058 for 6500K.
Usage Features
The monitor supports various input modes, including D-SUB (Analog), DVI (Digital), and HDMI. It features an On-Screen Display (OSD) for user adjustments and control. The "Smart, Fun, Menu, f-Engine" features suggest ease of use and enhanced visual experience. The "Auto bright" function indicates automatic luminance adjustment. The "headphone out" feature allows for direct audio output.
Maintenance Features
The manual emphasizes safety precautions for servicing, particularly regarding safety-related components marked in diagrams. It warns against electric shock from high voltage in the inverter circuit (up to 650Vrms) and advises careful handling of wires and connectors. Specific instructions are provided for handling the LCD module with backlight unit, including mounting, avoiding pressure/scratches on the panel, ESD protection, grounding personnel, and proper storage conditions.
Detailed servicing precautions cover:
- General Servicing: Always unplug AC power before handling components, disconnecting/reconnecting electrical plugs, or connecting test substitutes. Use appropriate high voltage meters. Do not spray chemicals. Clean electrical contacts with a specified acetone/isopropyl alcohol mixture. Do not defeat B+ voltage interlocks. Ensure solid-state device heat sinks are correctly installed. Always connect test receiver ground lead first and remove last.
- Electrostatically Sensitive (ES) Devices: Drain static charge from the body before handling ES devices. Place assemblies on conductive surfaces. Use grounded-tip soldering irons and anti-static solder removal devices. Do not use freon-propelled chemicals. Keep replacement ES devices in protective packaging until installation. Minimize bodily motions when handling unpackaged ES devices.
- Soldering Guidelines: Use a grounded-tip, low-wattage soldering iron with appropriate tip size and temperature (500°F to 600°F). Use RMA resin-core solder (60 tin/40 lead). Keep the tip clean and tinned. Thoroughly clean surfaces before soldering. Specific techniques for unsoldering and soldering are provided, emphasizing quick work to avoid overheating the circuit board.
- Component Removal/Replacement: Detailed procedures are given for removing and replacing ICs, small-signal discrete transistors, power output transistors, diodes, fuses, and conventional resistors.
- Circuit Board Foil Repair: Instructions for repairing damaged copper patterns at IC connections and other points using jumper wires are included.
The manual also outlines a structured adjustment process, including:
- Coverage: Applies to 24" Wide monitors manufactured in Kumi, Korea.
- Appointment: Adjustments must follow a fixed sequence, with potential modifications agreed upon by R&D engineers.
- Adjustment Order: Covers board assembly line adjustments (input signal connection, EEPROM checks, HDCP key writing) and total assembly line adjustments (horizontal/verticality, clock/clock phase, color coordinates, luminance, DPM operation).
- Troubleshooting Guide: Provides flowcharts for diagnosing "No Power," "No Raster (OSD is not displayed) – Inverter," "No Raster (OSD is not displayed) – Mstar," and "Trouble in DPM" issues.
Replaceable batteries are mentioned with a caution about the risk of explosion if replaced by an incorrect type and instructions for proper disposal.
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