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FILE NO. SM-CTV-O-155 COLOR TELEVISION SERVICE MANUAL MODELNO. 21BM91 CHASSIS NO. CN-18EA (V2) Please read this manual carefully before service. TABLE OF CONTENTS SPECIFICATIONS... 1 SAFETY INSTRUCTIONS AND MAINTENANCE ... 2 X-RAY RADIATION PRECAUTION... 2 SAFETY PRECAUTION ... 2 PRODUCT SAFETY NOTICE... 3 SAFETY SYMBOL DESCRIPTION ... 4 MAINTENANCE... 4 ADJUSTMENTS ... 5 SET-UP ADJUSTMENTS ... 5 CIRCUIT ADJUSTMENTS... 8 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION... 24 STRUCTURE BLOCK DIAGRAM ... 24 BLOCK DIAGRAM FOR SUPPLY VOLTAGE SYSTEM ... 25 CHASSIS DESCRIPTION ... 26 SERVICE DATA ... 27 TECHNICAL DATA OF KEY ICS ... 27 SERVICE DATA OF KEY ICS ... 51 REPLACEMENT OF PARTS... 58 APPENDIX 1. CIRCUIT DIAGRAM 2. FINAL ASSEMBLY DIAGRAMS 3. FIND WIRING DIAGRAMS 4. PRINTED CIRCUIT BOARD LAYOUTS SERVICE MANUAL SPECIFICATIONS Table 1 Specifications Model Number 21BM91 Color PAL, NTSC3.58, NTSC4.43, SECAM system RF system Sound B/G, D/K, I, M system Vi