This service manual provides service instructions for LCD Projection TV Models and Chassis: V28 Chassis V28+ Chassis WD-52527 WD-52528 WD-62527 WD-62528 This service manual includes: 1. Assembly and disassembly instructions for the front and rear cabinet Components 2. Servicing of the Lenticular Screen and Fresnel Lens. 3. Servicing down to major Components chassis, PWBs, Light Engine, Lamp Ballast, etc.. 4. Electrical adjustments. 5. Optical Adjustments. 6. Lead Free Soldering. 7. Chip parts replacement procedures. 8. Simplified circuit path diagrams. The parts list section of this service manual includes: 1. Cabinet and screen parts. 2. Electrical parts. Block diagrams of the above listed models are included in this service manual for better understanding of the circuitry.

Training Manual Including… Down-to-1 High Speed Troubleshooting Introduction About Mitsubishi Electric US ... 1 Chapter 1... Display Technologies and PTV Product Line Display Technologies ... 1-1 PTV Product Line... 1-3 Chapter 2... Disassembly and Service Engines ... 2-1 Identification ... 2-4 Chassis ... 2-4 PWBs ... 2-5 Mirror Access... 2-7 LCD Access for Cleaning ... 2-8 Chapter 3... Alignment Procedures Option Menu ... 3-1 Service Mode ... 3-1 Mechanical Adjustments ... 3-2 Electrical Adjustments ... 3-8 Chapter 4... Down-to-1 Troubleshooting Front Panel LEDs ... 4-1 Self Diagnostics... 4-2 Interface Troubleshooting ... 4-3 Symptom/Cause Troubleshooting... 4-4 Chapter 5... Circuit Block Diagrams Power Supplies ... 5-1 Video Signal Path ... 5-11 Sound Signal Path ... 5-15 Control Circuitry ... 5-16 Lamp Control Circuitry ... 5-17 Protection Circuitry... 5-18