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This service manual provides service instructions for the V25, V25+ and V25++ PTV chassis types. The specific models for each chassis type are listed below. Service personnel should read this manual thoroughly before servicing these chassis. V25 Chassis V25+ Chassis V25++ Chassis WS-48515 WS-55615 WS-55815 WS-55515 WS-65615 WS-65815 WS-65515 WS-73615 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 printed circuit boards (PCBs). 4. CRT replacement procedure. 5. Electrical adjustments. 6. Chip parts replacement procedures. 7. Circuit path diagrams. The parts list section of this service manual includes: 1. Electrical parts. 2. Cabinet and screen parts. Schematic and block diagrams of the above listed models are included in this service manual for better under- standing of the circuitry. PCB drawings are also included for easy location of parts and test points.

Chapter 1 Television Overview TV Accessories ... 8 Special Features ... 8 Front Control Panel ... 9 Back Panel ... 10 Important Notes ... 12 Chapter 2 Connecting External Devices & NetCommand® Setup ... 14 Wall Outlet Cable or Cable Box ... 15 Single Analog Antenna ... 16 Separate UHF and VHF Antennas ... 16 VCR Video and Audio to an Antenna or Wall Outlet Cable ... 17 VCR Video and Audio to a Cable Box ... 18 A/V Receiver or Stereo System ... 19 Satellite Receiver or Other Device with S-Video ... 19 DVD player with Component Video ... 20 DVI Device ... 20 HDMI Device ... 21 IR Emitter NetCommand® ... 22 IEEE 1394 Devices ... 23 IEEE 1394 Device Connection Styles ... 24 CableCARD™ Definition and Initial Screen Display ... 25 Helpful Hints ... 26 Chapter 3 NetCommand® Setup and Editing NetCommand® Pre-Memorized Devices ... 28 Remote Control Functions: Overview ... 29 Remote Control Functions: Operation, Care, Sleep Timer ... 30 NetCommand® OnScreen Buttons ... 31 3D Graphical ►IftiPÊI Menu System ... 32 NetCommand® Initial Setup ... 33 Edit NetCommand® Adding an A/V Receiver ... 35 Adding Devices ... 38 Changing, Deleting Devices, Finish Screen ... 42 Device Selection Menu ... 43 Using the Device Menu Button to Display Menus ... 44 Chapter 4 IEEE 1394 Devices and NetCommand® Controlled Recordings Adding IEEE 1394 Devices Automatically ... 46 IEEE 1394 Devices Compatibility ... 48 Using the Guide Button to Display ChannelView™ and Menus ... 49 NetCommand® Controlled Recordings ... 50 Direct VCR Recording ... 52 NetCommand® Controlled Peer-to-Peer Connections ... 53 Important Notes ... 54 Chapter 5 TV Menu Screen Operations Main Menu Choices ... 56 Setup Menu ... 57 NetCommand® Menu ... 59 Antenna Menu ... 60 Time Menu ... 62 Captions Menu ... 63 V-Chip Lock Menu ... 65 Audio Video Menu ... 68 A/V Setting Descriptions ... 69 Chapter 6 Special Features Display Formats ... 72 Operation of PIP and POP ... 74 Device Menu with NetCommand® ... 75 Appendix A: Bypassing the V-Chip Lock ... 77 Appendix B: High Definition Input Connection Compatibility ... 79 Appendix C: Remote Control Programming Codes ... 80 Appendix D: On-Screen Information Displays ... 83 Appendix E: NetCommand® Specialized Device Keys ... 84 Appendix F: Cleaning and Service ... 85 Appendix G: Diamond Shield™ Removal ... 86 Appendix H: Cabinet Separation ... 89 Troubleshooting ... 90 Additional Information ... 94 Index ... 95 Warranty ... 97

High Speed Troubleshooting Safety Precautions ... 2 Cabinet Disassembly ... 3 Chassis Removal ... 5 Troubleshooting ... 6 PCB Locations and Functions ... 8 PCB Parts Reference ... 9

Before servicing this chassis, it is important that the service person read the SAFETY PRECAUTIONS and PRODUCT SAFETY NOTICE contained in Part 1 of this manual. PART 2 SCHEMATIC DIAGRAMS CONTENTS Page Overall PCB Block Diagram ... 1 PCB-MAIN ... 2 PCB-TERMINAL [INPUT SWITCH] ... 3 PCB-TERIMINAL [PIC μP / FIF / E2P] ... 4 PCBs-CRT / DBF / PREAMP /CONTROL1 / CONTROL2 / FRONT ... 5 PCB-HDMI ... 6 PCB-SIGNAL-1 [MICRO] ... 7 PCB-SIGNAL-2 [CONVERGENCE GENERATOR] ... 8 PCB-SIGNAL-3 [VCJ / VERTICAL DEF / AUDIO] ... 9 PCB-TUNER-1 [TUNER / AUDIO] ... 10 PCB-TUNER-2 [ATSC DEMOD] ... 11 Refer to PART 1 for: • Specifications • Safety Precautions • Disassembly • CRT Replacement • Electrical Adjustments • Parts List • Block Diagrams