Service manual

2 Contents
Procedure ............................................................................................................. 38
Installing the Backplane Connector Shields............................................................... 40
Parts List .............................................................................................................. 40
Procedure ............................................................................................................. 40
HP E840xA Air Filter Kit........................................................................................... 42
Chapter 3
Servicing Your Mainframe ......................................................................................... 43
Chapter Overview....................................................................................................... 43
Problem Isolation........................................................................................................43
No Power Line Fuse ............................................................................................ 43
Isolating Problems ............................................................................................... 44
Replacing Assemblies................................................................................................. 44
Removing the Rear Panel from the Mainframe .................................................. 45
Removing the Mainframe Cover ......................................................................... 46
Replacing the Basic Monitor Board .................................................................... 47
Replacing the HP E8401A Power Supply ...........................................................48
Replacing the HP E8403A Power Supply ...........................................................49
Replacing the Impeller ........................................................................................ 50
Replacement Power Cords.......................................................................................... 51
Appendix A
HP E8401A, E8403A Product Specifications ............................................................ 53
Product Descriptions................................................................................................... 53
General Specifications ......................................................................................... 53
Mechanical Specifications ................................................................................... 53
Output Power Specifications ...................................................................................... 54
Total Available and Usable Power ...................................................................... 54
Peak and Dynamic Current ................................................................................. 54
Output Voltage Specifications ............................................................................ 55
Input Power Requirements.......................................................................................... 55
Cooling Specifications................................................................................................ 56
Cooling Specification Charts .............................................................................. 56
Acoustical Noise Specifications ................................................................................. 58
Backplane Specifications............................................................................................ 58
Basic Monitor Specifications...................................................................................... 58
Environmental Specifications..................................................................................... 59