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File name sm20s.pdf

CONTENTS CIRCUIT DESCRIPTION OF THE 11AK20S CHASSIS ... 2 1. GENERAL INFORMATION : ... 2 2. IF STAGE : ... 2 2.1 Video and Sound IF System & Switch IC STV8223: ... 3 2.2 Multi-Standard Video IF, Sound IF and Switch IC (STV 8224) ... 3 3. SIGNAL PROCESSING PART : ... 4 3.1 Bus-controlled Multi-Standard TV Processor IC, STV 2118 : ... 4 3.1.1 Deflection Circuit: ... 4 3.1.2 Filters : ... 5 3.1.3 Video Circuit : ... 5 3.1.4 Chroma Circuit : ... 5 3.1.5 Other Functions : ... 5 3.2 Base Band Chroma Delay Line IC STV 2180 : ... 6 4. HORIZONTAL OUTPUT AND EHT STAGE : ... 6 5. VERTICAL OUTPUT STAGE (TDA 1771) ... 6 6. SOUND OUTPUT STAGE (TDA2822M) : ... 6 7. POWER SUPPLY (SMPS) : ... 6 8. uC (MICROCONTROLLER) : ... 7 9. CRT BASE-BOARD : ... 7 MANUAL ADJUSTMENT PROCEDURES OF THE 11AK20S CHASSIS ... 8 How to enter and exit the SERVICE Menu: ... 8 How to use the ADJUST Menu: ...