NEC VERSA 6220 Service Manual page 11

viii Contents
4-8 Removing the Speaker Caps........................................................................... 4-10
4-9 Lifting up the Keyboard ................................................................................. 4-11
4-10 Positioning the Keyboard ............................................................................... 4-12
4-11 DIMM Features ............................................................................................. 4-13
4-12 Installing the DIMM....................................................................................... 4-13
4-13 Removing an Installed DIMM ........................................................................ 4-14
4-14 Removing the Bottom Base Screws................................................................ 4-15
4-15 Location of the Three Screws......................................................................... 4-16
4-16 Separating the Top Cover from the Base Unit ................................................ 4-17
4-17 Removing the VersaGlide............................................................................... 4-18
4-18 LCD Status Board ......................................................................................... 4-19
4-19 Removing Bridge Battery, CMOS Battery, and Buzzer .................................. 4-20
4-20 Removing the IR Assembly and Graph Board................................................. 4-22
4-21 Removing the CPU Board from the Graph Board........................................... 4-24
4-22 Removing the I/O Board ................................................................................ 4-25
4-23 NEC Versa Model 6220/30/60 Illustrated Parts Breakdown ........................... 4-26
A-1 Graph Board Layout ...................................................................................... A-1
A-2 I/O Board Layout........................................................................................... A-2
List of Tables
1-1 Model Configurations .................................................................................... 1-2
1-2 Memory Map ................................................................................................. 1-16
1-3 NEC Versa Series Chip Types and Technologies............................................ 1-18
1-4 Interrupt Controllers ...................................................................................... 1-21
1-5 Automatic Power-Saving Features ................................................................. 1-22
1-6 Maximum Performance Default Settings......................................................... 1-24
1-7 Specifications................................................................................................. 1-25
2-1 I/O Connector Descriptions............................................................................ 2-3
2-2 Control and Switch Functions ........................................................................ 2-12
2-3 Fn Key Operations ......................................................................................... 2-14
2-4 POST Error Messages.................................................................................... 2-22
2-5 Beep Codes.................................................................................................... 2-24
2-6 Setup Key Functions ...................................................................................... 2-28
2-7 Setup Parameters ........................................................................................... 2-29