Specifications

6-4 HARDWARE
TROUBLESHOOTING
The Scorpion Vector Network Measurement System hardware includes
the following:
q
CPU Module
q
Source Module(s)
q
Receiver Module
q
Power Supply (PDU) Module
q
Front Panel Assembly
q
Option Module (for units equipped with Option 4 or 5 only)
CPU MODULE CPU module-related system failures include:
q
System does not boot up
q
Display problems
q
Printer Problems
q
GPIB Interface Problems
System Boot-up
Problem
This condition can be a result of a failure of the +6.5 volt output of the
Power Distribution Unit, failure of the CPU module memory, or a dis-
lodged Lithium Battery mounted on U74 (next to the boot EPROM).
1. Verify that the +6.5 volt output of the Power Distribution Unit is
working properly.
2. Verify that the battery mounted on U74 is installed properly. Refer
to Figure 6-2 on the previous page for a part location diagram.
3. Replace the CPU Module.
Hard Disk
Problem
This condition can be a result of a failure of the Lithium Battery or CPU
module.
1. Replace the Lithium Battery (p/n: 633-25) on the CPU as described
in Chapter 7 (Removal and Replacement Procedures), page 7-15.
2. If the problem persists, replace the CPU assembly.
6-8 MS462XX MM
HARDWARE TROUBLESHOOTING TROUBLESHOOTING