Service manual

60 Chapter 2
Troubleshooting
Perform Measurements
Perform Measurements
This section helps you to isolate a problem in the system through actual device
measurements. In brief, the Hard Disk Read/Write Test System consists of a data
generation instruments, measuring instruments and the spinstand mechanical part as shown
in Figure 2-42 and Figure 2-43 (Agilent E5023A does not include the spinstand). These
figures are useful to isolate a defective assembly in the system. For example, TAA, PW and
Baseline measured data which are measured at the E5038B are wrong in spite of the other
data such as Narrow Band TAA is good, it is assumed that the E5038B gives problem.
Especially, in case of the measurement instrument such as the E5038B, E5040A and
Oscilloscope gives problem, it is easy to isolate a defective instrument. However, if one of
the E5037C/D, E5035B, Head Amp and Spinstand gives problem, it is difficult to specify
the defective instrument. In this case, to replace the instrument except for the Spinstand in
sequence is the best method. And, when you encounter the measurement data does not
return or ‘Timeout occurred’ error message appears, it is assumed that the trigger line stops
causes this problem. In this case, to check the trigger line on the E5035B and Spinstand, or
to inspect the status LED on the VXI instrument is the best method. Refer to Appendix B,
“Measurement Paths,” on page 157 which describes the matrix with measurement paths
and measurement parameters. If you have any problems as shown in Table 2-11, “Trouble
Isolation Hints,” on page 63, it is possible to roughly isolate a defective instrument.