Mitsubishi E55LCD Service Manual page 56

CIRCUIT DESCRIPTION
TABLE OF CONTENTS
1. Power circuit ------------------------------------------------------------------------------------------------- 7-2
1.1 Power input ------------------------------------------------------------------------------------------------- 7-2
1.2 Soft-power circuit ------------------------------------------------------------------------------------------ 7-2
1.3 DC to Dc circuit -------------------------------------------------------------------------------------------- 7-2
1.4 Panel Vcc control ------------------------------------------------------------------------------------------ 7-2
2. Microprocessor control circuit ---------------------------------------------------------------------------- 7-2
2.1 Clock circuit ------------------------------------------------------------------------------------------------- 7-2
2.2 I2C buses --------------------------------------------------------------------------------------------------- 7-2
2.3 General-purpose port ------------------------------------------------------------------------------------ 7-2
2.3.1 Key scan status ----------------------------------------------------------------------------------------- 7-2
2.3.2 Scaler control -------------------------------------------------------------------------------------------- 7-2
2.3.3 Led control ----------------------------------------------------------------------------------------------- 7-3
2.3.4 Data memory -------------------------------------------------------------------------------------------- 7-3
3. Scaler ---------------------------------------------------------------------------------------------------------- 7-3
7-1
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