NEC POWERMATE PROFESSIONAL 9000 Service Manual page 10

viii Contents
Section 4 Maintenance and Troubleshooting
Online Services ............................................................................................................ 4-2
NECCSD FaxFlash Service................................................................................... 4-2
NECCSD Bulletin Board System .......................................................................... 4-3
E-Mail/Fax Technical Support Services................................................................. 4-4
Internet ................................................................................................................. 4-5
Maintenance ................................................................................................................ 4-6
System Cleaning.................................................................................................... 4-6
Keyboard Cleaning................................................................................................ 4-7
Mouse Cleaning .................................................................................................... 4-8
Troubleshooting........................................................................................................... 4-9
Diagnosing and Solving Problems ......................................................................... 4-9
Replacing the CMOS Battery ................................................................................ 4-14
Section 5 Repair
Disassembly and Reassembly........................................................................................ 5-1
System Unit Cover Removal ................................................................................. 5-2
Expansion Board Removal .................................................................................... 5-3
Front Panel Removal............................................................................................. 5-3
Blank Panel and Metal Slot Cover Removal .......................................................... 5-3
5 1/4-Inch Device Removal ................................................................................... 5-5
Drive Cage Removal ............................................................................................. 5-6
Internal Hard Disk Removal.................................................................................. 5-7
Diskette Drive Removal ........................................................................................ 5-8
DIMM Module Removal....................................................................................... 5-9
Video Board Removal........................................................................................... 5-10
Processor Subsystem Removal .............................................................................. 5-10
Power Supply Removal......................................................................................... 5-11
System Board Removal......................................................................................... 5-13
System Board Replacement................................................................................... 5-13
Illustrated Parts Breakdown ......................................................................................... 5-14
Appendix A Connector Pin Assignments
System Board Connector Locations ............................................................................. A-1
Parallel Interface Connector .................................................................................. A-5
Serial Interface Connectors ................................................................................... A-6