This service manual provides service instructions for PTV Models WS-55859 and WS-65869 which use the V19 chassis, and PTV Models WS-55909 WS-65909 and WS-73909 which use the V19+ chassis. Service personnel should read this manual thoroughly before servicing these chassis. 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. Cabinet and screen parts. 2. Electrical 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.

PART 2 SCHEMATIC DIAGRAMS CONTENTS Page Overall PCB Block Diagram ... 1 PCB-MAIN ... 2 PCB-POWER ... 3 PCB-TERMINAL ... 4 PCB-SIGNAL-1 (MICRO) ... 5 PCB-SIGNAL-2 (AV I/O) ... 6 PCB-SIGNAL-3 (VIDEO/CHROMA) ... 7 PCB-3DYC ... 8 PCBs-CONV GEN / JUNGLE ... 9 PCBs-CRT / CONTROL /SVM / DBF / DM POWER ... 10 PCB-2HDW-1 ...11 PCB-2HDW-2 ... 12 PCB-2HDW-3 ... 13 Refer to PART 1 for: • Specifications • Safety Precautions • Disassembly • CRT Replacement • Electrical Adjustments • Parts List • Block Diagrams