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Colour Television Chassis
FM23 AC, FM24 AB, FM33 AA




Contents Page Contents Page
1 Technical Specifications, Connections, and 2 LED/Switch (Speakerless sets) (Diagram LD) 57 58
Chassis Overview Power Supply (FM23 AC) (Diagr. P1-P7) 59-65 66-72
2 Safety Instructions, Maintenance, Warnings, 5 Power Supply (FM24 AB) (Diagr. P1-P7) 73-79 80-86
and Notes Power Supply (FM33 AA) (Diagr. P1-P7) 87-93 94-98
3 Directions for Use 6 SCAVIO: Function Blocks (Diagr. SC1) 99 114-119
4 Mechanical Instructions 20 SCAVIO: Sync Selection (Diagr. SC2) 100 114-119
5 Service Modes, Error Codes, Fault Finding, 24 SCAVIO: Video Selection (Diagr. SC3) 101 114-119
and Repair Tips SCAVIO: Video ADC (Diagr. SC4) 102 114-119
6 Block Diagrams, Testpoint Overview, and SCAVIO: Video Select. Decoder (Diagr. SC5) 103 114-119
Waveforms SCAVIO: VGA Input (Diagr. SC6) 104 114-119
Wiring Diagram (FM23 AC/FM24 AB) 31 SCAVIO: Control Functions 1 (Diagr. SC7) 105 114-119
Wiring Diagram (FM33 AA) 32 SCAVIO: Control Functions 2 (Diagr. SC8) 106 114-119
Block Diagram Video 33 SCAVIO: Scaler Clock Gen. (Diagr. SC9) 107 114-119
Testpoint Overview: SCAVIO Panel 34 SCAVIO: PW Scaler + Memory (Diagr. SC10) 108 114-119
Block Diagram Audio 35 SCAVIO: Back-End EPLD (Diagr. SC11) 109 114-119
Testpoint Overview Audio Amplifier Panel 36 SCAVIO: Back-End LVDS Out (Diagr. SC12) 110 114-119
Block Diagram Power Supply (FM23 AC) 37 SCAVIO: Audio Source Select. (Diagr. SC13) 111 114-119
Testpoint Overview Power Supply (FM23 AC) 38 SCAVIO: Audio Processor (Diagr. SC14) 112 114-119
Block Diagram Power Supply (FM24/FM33) 39 SCAVIO: Audio Delay Line (Diagr. SC15) 113 114-119
Testpoint Overview: Power Supply (FM24 AB) 40 VGA Connector Panel (Diagr. VGA) 120 121-122
Testpoint Overview: Power Supply (FM33 AA) 41 8 Electrical Alignments 123
Power Lines Overview (FM23 AC) 42 9 Circuit Descriptions 126
Power Lines Overview (FM24 AB/FM33 AA) 43 List of Abbreviations 146
I2C-IC Overview (FM23/FM24/FM33) 44 IC Data 148
7 Circuit Diagrams and PWB layouts Diagram PWB 10 Spare Parts List 152
Audio & Supply: DC Protection (Diagram A1) 45 52-53 11 Revision List 170
Audio & Supply: Filters (Diagram A2) 46 52-53
Audio & Supply: Left High (Diagram A3) 47 52-53
Audio & Supply: Left Low (Diagram A4) 48 52-53
Audio & Supply: Right High (Diagram A5) 49 52-53
Audio & Supply: Right Low (Diagram A6) 50 52-53
Audio & Supply: Supply+DC Prot.(Diagram A7) 51 52-53
EMC Filter Panel (Diagr. EMC) 54 54
LED/Switch (Sets with Speakers) (Diagram LD) 55 56