NEC AccuSync LCD71VM - Block Diagram -

7-1
CIRCUIT DESCRIPTION
TABLE OF CONTENTS
Page
1. Power Circuit ------------------------------------------------------------------------------------------------------ 7-2
1.1 Power Input ------------------------------------------------------------------------------------------------------ 7-2
1.2 DC to DC Circuit ------------------------------------------------------------------------------------------------ 7-2
1.3 Panel Vcc Control ---------------------------------------------------------------------------------------------- 7-2
2. Scaling IC ---------------------------------------------------------------------------------------------------------- 7-2
2.1 Clock Circuit ----------------------------------------------------------------------------------------------------- 7-2
2.2 I2C Buses -------------------------------------------------------------------------------------------------------- 7-2
2.3 Key Scanning --------------------------------------------------------------------------------------------------- 7-2
2.4 Reset -------------------------------------------------------------------------------------------------------------- 7-3
2.5 LED Control ------------------------------------------------------------------------------------------------------ 7-3
2.6 AUDIO Control -------------------------------------------------------------------------------------------------- 7-3
3. Memory ------------------------------------------------------------------------------------------------------------- 7-3
4. Sync Interface ---------------------------------------------------------------------------------------------------- 7-3
5. INTERFACE BOARD BLOCK DIAGRAM ------------------------------------------------------------------ 7-4