Sony DNW-A75 Maintenance Manual page 8

5. Periodic Maintenance and Inspection
5-1. Periodic Maintenance .................................................................................. 5-1
5-2. Cleaning ...................................................................................................... 5-5
5-3. Video Head Tip Protrusion Check ............................................................ 5-13
6. Spare Parts
6-1. Notes on Repair Parts .................................................................................. 6-1
6-2. Exploded Views .......................................................................................... 6-2
6-3. Plug-in Boards ............................................................................................. 6-4
6-4. Packing Materials and Supplied Accessories List ...................................... 6-5
6-5. Power Cords List ......................................................................................... 6-5
6-6. Fixtures List ................................................................................................ 6-6
Appendix A Outline of Format
A-1. Outline ........................................................................................................ A-1
A-2. Recording Format ....................................................................................... A-1
A-3. Head Configuration .................................................................................... A-5
A-4. Signal Processing ....................................................................................... A-6
Appendix B Setting Check Sheet
Appendix C Circuit Description and Overall Block Diagram
4
5-1-1. Index ........................................................................................... 5-1
5-1-2. Periodic Replacement and Check Item Table ............................ 5-2
5-1-3. Hours Meter ............................................................................... 5-4
5-2-1. Cleaning using Cleaning Tape ................................................... 5-5
5-2-2. General Information for Cleaning using Cleaning Cloth ........... 5-5
5-2-3. Tape Running Surface of Upper Drum and
Video Heads Cleaning ................................................................ 5-7
5-2-4. Tape Running Surface of Lower Drum and
Lead Surface Cleaning ............................................................... 5-8
5-2-5. Stationary Heads Cleaning ......................................................... 5-9
5-2-6. Tape Running System and Tape Cleaner Cleaning .................. 5-10
5-2-7. Fan Motors Cleaning ................................................................ 5-11
5-2-8. Cassette Compartment and Cassette Supports Cleaning .......... 5-12
5-3-1. Head Tip Protrusion Measurement .......................................... 5-13
5-3-2. Brush Slip Ring Assembly Removal/Reinstallation ................ 5-16
A-4-1. Compression System of Video Signal ....................................... A-6
A-4-2. Outline of Signal Processing ..................................................... A-6
DNW-A75/A75P