Circuit Description - Mitsubishi Diamond Plus 93SB Service Manual

CIRCUIT DESCRIPTION

TABLE OF CONTENTS
1. Power Circuit ........................................................................................................................ 7-3
1.1 General Description ........................................................................................................... 7-3
1.2 EMI Circuit ......................................................................................................................... 7-3
1.3 AC Rectification and Smoothing Capacitor ........................................................................ 7-3
1.4 Degaussing Circuit ............................................................................................................. 7-3
1.5 Transformer and Energy .................................................................................................... 7-3
1.6 Overcurrent Protection ....................................................................................................... 7-3
1.7 Starter Circuit ..................................................................................................................... 7-4
1.8 Sync Circuit ........................................................................................................................ 7-4
1.9 Feedback Circuit ................................................................................................................ 7-4
1.10 Snubber Circuit ................................................................................................................ 7-4
1.11 Power Management Function .......................................................................................... 7-4
1.12 Harmonic Coil Changeover Circuit .................................................................................. 7-4
2. MCU ..................................................................................................................................... 7-5
2.1 Frequency Specifications ................................................................................................... 7-5
2.2 System Architecture ........................................................................................................... 7-5
2.3 Inputs ................................................................................................................................. 7-5
2.4 Outputs ............................................................................................................................... 7-5
2.5 Pin Assignments ................................................................................................................ 7-6
2.6 CS Table ............................................................................................................................. 7-6
2.7 Model Changeover Table ................................................................................................... 7-6
3. Deflection Circuit .................................................................................................................. 7-7
3.1 Deflection Control IC (IC501) ............................................................................................. 7-7
3.2 Horizontal Deflection Circuit ............................................................................................... 7-8
3.2.1 Horizontal Oscillator Circuit ............................................................................................ 7-8
3.2.2 Step-up Horizontal Deflection Source (+B) ..................................................................... 7-8
7-1
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