panasonic gp31 technical guide 133 free download

File name gp31_technical_guide_133.pdf

Technical Guide Colour Television GP 31 Chassis Circuit Explanations Panasonic Panasonic AVC Networks Kuala Lumpur Malaysia Sdn. Bhd. 1 Contents Introduction 3 Location of Control & Circuit Boards 4 GP-31 Chassis Block Diagram 5 1. Tuning Circuit 1.1 Signal Processing 6 1.2 IF Control 6 2. Ultimate One Chip IC601 2.1 Features 8 2.2 IIC Bus 9 2.3 Memory IC 9 2.4 Reset Circuit 10 2.5 IC601 Pin Configuration 11 3. Video Circuit 3.1 Video Signal Processing 14 4. Audio Circuit 4.1 Audio Processor 17 4.1.1 Sound Processor 17 4.1.2 Audio Amplifier 17 5. Deflection Circuit 5.1 Horizontal Output Circuit 20 5.1.1 Horizontal Output Operation 21 5.2 Vertical Output Circuit 23 5.2.1 Vertical Output Operation 23 6. Colour Output 6.1 Colour Output Stage 24 7. Protection Circuit 25 8. Power Circuit 8.1 Start-up Circuit 29 8.2 Output Voltage Control 29 8.3 Regulation 30 8.4 Over Voltage Protection Circuit 30 8.5 Over Current Protection Circuit 31 8.6 Latch Circuit 31 8.7 Standby Operation 31 2 ! WARNING This service information is designed for experienced repair technicians only and is not designed for use by general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death. Introduction We at Panasonic realise that the service engineer needs to understand the circuitry inside the TV and for this need, we have produced this Technical Guide. This Technical Guide contains information for GP 31 chassis and should be used in conjunction with the relevant Service Manuals for this chassis. As the Technical Guide for the GP 31 chassis covers such a wide range of models, some differences may occur in circuit descriptions and component references.