Specifications
Circuit description of CCM420 monitor Application Note
AN97032
Philips Semiconductors
5
CONTENTS
1. INTRODUCTION ..........................................................................................................................................7
1.1 CCM420 Specification ...........................................................................................................................8
1.2 List of abbreviations...............................................................................................................................9
2. BLOCK DIAGRAM...................................................................................................................................... 12
3. CIRCUIT DESCRIPTIONS..........................................................................................................................14
3.1 Switched mode power supply ..............................................................................................................14
3.2 Microcontroller..................................................................................................................................... 14
3.3 I
2
C-bus autosync deflection controller for PC/TV monitors TDA4854.................................................... 14
3.3.1 Brightness uniformity ..................................................................................................................15
3.4 Horizontal deflection output stage ........................................................................................................ 15
3.4.1 B+ supply ...................................................................................................................................15
3.4.2 Line driver and output stage........................................................................................................ 15
3.4.3 Linearity and S-correction control................................................................................................ 15
3.5 Vertical deflection output stage............................................................................................................ 16
3.6 EHT supply.......................................................................................................................................... 16
3.6.1 Grid 1 supply .............................................................................................................................. 17
3.6.2 Grid 2 supply .............................................................................................................................. 17
3.6.3 Focus supply .............................................................................................................................. 17
3.7 Rotation circuit..................................................................................................................................... 17
3.8 Sound circuit........................................................................................................................................17
4. CIRCUIT DIAGRAMS ................................................................................................................................. 18
4.1 Last minute changes............................................................................................................................ 18
5. PARTS LIST...............................................................................................................................................25
5.1 Resistors and potentiometers .............................................................................................................. 25
5.2 Capacitors...........................................................................................................................................28
5.3 Transistors .......................................................................................................................................... 29
5.4 Diodes................................................................................................................................................. 30
5.5 Integrated circuits ................................................................................................................................ 31
5.6 Wire-wound components .....................................................................................................................31
5.7 Miscellaneous...................................................................................................................................... 31
6. PRINTED CIRCUIT BOARD LAYOUT........................................................................................................ 33
6.1 Lay-out hints........................................................................................................................................ 33
7. ALIGNMENT PROCEDURE ....................................................................................................................... 38
7.1 Equipment...........................................................................................................................................38
7.2 Alignment ............................................................................................................................................ 38
8. DEBUGGING PROCEDURE....................................................................................................................... 40
9. REFERENCES............................................................................................................................................ 42