NEC PowerMate Pro150 Series Service Manual page 6

Section 4 Maintenance and Troubleshooting
Maintenance ................................................................................................................ 4-2
System Cleaning ................................................................................................... 4-2
Keyboard Cleaning ............................................................................................... 4-3
Mouse Cleaning.................................................................................................... 4-4
Troubleshooting .......................................................................................................... 4-5
Error Messages .................................................................................................... 4-5
Diagnosing and Solving Problems......................................................................... 4-8
Beep Codes .......................................................................................................... 4-12
CMOS Battery Replacement................................................................................. 4-13
Section 5 Repair
Disassembly and Reassembly ....................................................................................... 5-1
Side Panel Removal .............................................................................................. 5-2
Expansion Board Removal.................................................................................... 5-4
SIMM Removal.................................................................................................... 5-5
Front Panel Assembly Removal............................................................................. 5-6
Blank Panel and Metal Cover Plate Removal ........................................................ 5-6
3 1/2-Inch Drive Bracket Removal........................................................................ 5-7
3 1/2-inch Diskette Drive Removal ....................................................................... 5-8
3 1/2-inch Hard Disk Drive Removal .................................................................... 5-9
5 1/4-Inch Device Removal................................................................................... 5-10
Card Guide/Fan Bracket Removal......................................................................... 5-11
Fan Removal ........................................................................................................ 5-12
Speaker Assembly Removal .................................................................................. 5-13
Power Supply Removal ........................................................................................ 5-14
System Board Removal ........................................................................................ 5-15
Illustrated Parts Breakdown......................................................................................... 5-16
Appendix A Connector Pin Assignments
Parallel Interface Connector......................................................................................... A-2
Serial Interface Connectors.......................................................................................... A-3
Keyboard and Mouse Connectors ................................................................................ A-4
Power Supply Connector............................................................................................. A-5
Diskette Drive Connector ............................................................................................ A-6
IDE Connectors .......................................................................................................... A-7
Hard Drive LED Connector......................................................................................... A-8
Power LED Connector ................................................................................................ A-8
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