NEC POWERMATE P - SERVICE MANUAL 1996 Service And Reference Manual page 6

vi Contents
Section 4 Maintenance and Troubleshooting
Maintenance ................................................................................................................ 4-1
System Cleaning ................................................................................................... 4-2
Keyboard Cleaning ............................................................................................... 4-2
Mouse Cleaning.................................................................................................... 4-3
Troubleshooting .......................................................................................................... 4-4
Error Messages..................................................................................................... 4-4
Diagnosing and Solving Problems ......................................................................... 4-6
Beep Codes .......................................................................................................... 4-10
Section 5 Repair
Disassembly and Reassembly ....................................................................................... 5-1
System Unit Cover Removal ................................................................................. 5-2
Expansion Board Removal.................................................................................... 5-4
SIMM Removal.................................................................................................... 5-4
Front Panel Assembly Removal............................................................................. 5-6
Blank Panel and Metal Cover Plate Removal......................................................... 5-7
3 1/2-Inch Drive Bracket Removal........................................................................ 5-9
Card Guide/Fan Bracket Removal......................................................................... 5-9
Speaker Assembly Removal .................................................................................. 5-10
3 1/2-inch Diskette Drive Removal ....................................................................... 5-11
5 1/4-Inch Device Removal................................................................................... 5-12
Rear Internal 3 1/2-Inch Drive Removal................................................................ 5-14
Power Supply Removal......................................................................................... 5-16
PCI/ISA Backboard Removal ............................................................................... 5-17
System Board Removal......................................................................................... 5-17
Illustrated Parts Breakdown.................................................................................. 5-18
Appendix A Connector Pin Assignments
Serial Interface Connectors.......................................................................................... A-3
Parallel Interface Connector......................................................................................... A-4
VGA Interface Connector Pin Assignments.................................................................. A-6
Speaker Connector Pin Assignments............................................................................ A-7
Power Supply Connector ............................................................................................. A-7
Keyboard and Mouse Connectors ................................................................................ A-8
IRDA Connector ......................................................................................................... A-8