HP E8402A, User And Service Manual, Page: 203 / 249

Servicing Your Mainframe 205 Chapter 5
Chapter 5
Servicing Your Mainframe
Chapter Overview
This chapter contains information for troubleshooting and replacing
selected components of the HP E840xA VXI mainframe. This chapter
includes the following information:
•
Problem Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
•
Replacing Assemblies
. . . . . . . . . . . . . . . . . . . . . . . . . . . .206
•
Replacement Power Cords and Line Fuse
. . . . . . . . . . . . . .215
Problem Isolation
Table 5-1 lists symptoms which could appear in the mainframe over time.
The assembly most likely responsible for the symptom is also listed. Notice
that customer repair of the HP E840xA is limited to replacement of the
monitor printed circuit (PC) assemblies (Enhanced Monitor PC board,
temperature monitor PC boards, Enhanced Monitor display PC board),
power supply, and impeller assemblies.
WARNING
There are no serviceable parts inside the mainframe. Repair is
limited to replacement of the monitor printed circuit
assemblies, power supply, power supply fan, and impeller
(backplane fan). Replacement of these components must be
performed at a static-controlled workstation by trained service
personnel only.
WARNING
The front panel power switch does not disconnect all power
from internal circuits. Unplug the power cord before opening
the mainframe fro service.
No Power Line Fuse
There are no user-replaceable power line fuses in the HP E8402 and E8404
VXI mainframes. If the mainframe power supply fails to operate, the power
supply should be replaced. Exchange assemblies are available; refer to
Figure 5-2.