Mitsubishi Electric Diamond View 1995SL Service Manual page 34

1995SL CRT Monitor Service Guide
Table of Contents
1995SL System Block Diagram ............................................................................................................. 3
Switching Power Supply Operation Theory ........................................................................................... 4
1. General Specification............................................................................................................... 4
2. Block Diagram ......................................................................................................................... 4
3. Circuit Operation Theorem ...................................................................................................... 5
3.1 RFI FILTER............................................................................................................... 5
3.2 Rectifier and filter ...................................................................................................... 5
3.3 switching Element and isolation transformer ............................................................ 6
3.4 Output Rectifier and filter .......................................................................................... 6
3.5 Control circuit ............................................................................................................ 7
3.6 Feedback circuit........................................................................................................ 8
3.7 DEGAUSS CIRCUIT................................................................................................. 8
3.8 power saving control ................................................................................................. 8
MEA 1995SL MICROCONTROLLER CIRCUIT OPERATION THEORY.......................................... 9
1. Introduction .............................................................................................................................. 9
2. Block diagram .......................................................................................................................... 9
3.MCU and the peripheral circuit operation theory ...................................................................... 10
3-1.MCU function............................................................................................................ 10
3-2.How to detect mode timing ....................................................................................... 10
3-3.What are the valid key functions for user ................................................................. 10
3-4.How to memorize the timing and adjusted data ....................................................... 11
3-5.How to display the OSD menu.................................................................................. 11
3-6.How to execute the auto alignment function............................................................. 11
Deflection Circuit.................................................................................................................................... 12
[ 1995SL Autosync Deflection Controller Circuit ] ........................................................................ 14
[ Vertical Deflection ] .................................................................................................................... 14
[ G1 and Spot-killer ] .................................................................................................................... 15
[ Tilt Circuit ] ................................................................................................................................. 16
[ Horizontal Size Modulation Circuit ] ........................................................................................... 16
< H-size and East-west PWM generator > ..................................................................... 16
< H-size Output Circuit >................................................................................................. 17
< Top Ringing Elimination Circuit >................................................................................. 17
< H-driver Circuit >.......................................................................................................... 17
< Cs Control Circuit >...................................................................................................... 18
< H-linearity Control Circuit >.......................................................................................... 18
[ High Voltage Processing Circuit ] .............................................................................................. 19
Chapter 2 Circuit Operation Theory
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