Service manual

iv
1.4.3 Digital dynamic convergence clear (DDCC) circuit ............................................. 1-11
1.4.3.1 Production of compensation current waveform ..................................... 1-11
1.4.3.2 Waveform, and operation on the picture ................................................ 1-12
1.4.3.3 Adjustment method .................................................................................... 1-12
1.4.3.4 Block diagram ............................................................................................. 1-12
1.5 Control block........................................................................................................................ 1-17
1.5.1 Function of control circuit ........................................................................................ 1-17
1.5.2 Auto-tracking process .............................................................................................. 1-17
1.5.3 EEPROM .................................................................................................................... 1-17
1.5.4 On-Screen-Manager (OSM) controller .................................................................. 1-17
1.5.5 Heater voltage control.............................................................................................. 1-17
1.5.6 Protection circuit operation ..................................................................................... 1-17
1.5.6.1 X-ray protector ............................................................................................ 1-17
1.5.6.2 High voltage data error detection ............................................................ 1-18
1.5.6.3 Beam current protector.............................................................................. 1-18
1.5.6.4 Power-On Indicator (LED) flickering pattern in each protector operating .... 1-18
1.5.6.5 Operating time ............................................................................................ 1-18
1.5.6.6 The DDC communication........................................................................... 1-18
1.5.6.7 Microcomputer pin assignment ................................................................ 1-19
1.6 Safety protection circuit and X-ray protection circuit .................................................... 1-20
1.6.1 X-ray protection circuit............................................................................................. 1-20
1.6.2 Beam current protection circuit .............................................................................. 1-20
1.6.3 IC701 overcurrent protection circuit ...................................................................... 1-20
1.6.4 IC701 overload protection circuit ........................................................................... 1-20
1.6.5 IC902 overcurrent protection circuit ...................................................................... 1-20
1.6.6 Short-circuit protection circuit on secondary power side ................................... 1-20
1.6.7 Overvoltage protection circuit................................................................................. 1-20
1.7 Adjustment ........................................................................................................................... 1-21
1.7.1 Adjustment mode ...................................................................................................... 1-21
1.7.2 User mode (Normal mode) ...................................................................................... 1-21
1.7.3 Factory mode............................................................................................................. 1-24
1.7.3.1 How to entering to Factory mode............................................................. 1-24
1.7.3.2 How to cancel Factory mode .................................................................... 1-24
1.7.3.3 How to enter FACTORY-HV mode........................................................... 1-24
2. Adjustment procedure ............................................................................................................... 2-1
2.1 Measuring instruments....................................................................................................... 2-1
2.2 Preparatory inspections ..................................................................................................... 2-1
2.3 Names of each monitor part .............................................................................................. 2-2
2.3.1 Configuration of front control panel ....................................................................... 2-2
2.3.2 Configuration of rear input connector (signal input) ........................................... 2-2