7100ux Optical Jukebox Service Manual (AA969-90904, September 2004)

Troubleshooting and Diagnostics

20 1000ux/1900ux/2300ux and 3800ux/7100ux Optical Jukebox Service Manual

List of suspect FRUs

If a hard failure or a recovered failure occurs, a list of possible FRUs that may have been at

fault is returned.

Figure 1: Suspect FRUs

How suspect FRUs are evaluated

Similar to treating symptoms rather than the real problem, the suspect FRUs given by the FRU

isolation procedure may actually mask the root cause of the problem.

The hard move error that caused the robotics to run the FRU isolation test may only be a

product of the actual problem. Blindly and repeatedly replacing the suspect FRU(s) will not

reliably solve a problem.

If you consider the suspect FRU as a pointer to the problem area rather than the problem itself,

an educated visual inspection should reveal the real problem.

A good visual inspection requires an understanding of how the jukebox normally operates. To

understand what the robotics do in normal operation, run the various movements available

from the control panel and watch it closely. Reading the descriptions in Table 7 “Micro-move

IDs and expanded descriptions” on page 34 will also help you understand the small moves that

comprise jukebox operation.

PROBLEM

Internal Self-tests

FRU A

FRU B

FRU C

Most likely

Least likely