Service manual

Troubleshooting

This chapter contains information for troubleshooting the new devices

available on the VAXstation 3100 Model 76 system. The label on the back

of the system box indicates that you are working on the

VS43A-xx. All troubleshooting procedures are performed while in console

mode (operating system software halted).

2.1 Troubleshooting Procedures

This section contains troubleshooting information for the devices listed

below.

• 4 Mbyte memory DSIMM (Section 2.2)

• RX23 disk drive with the SCSI/FDI adapter module (Section 2.3)

2.2 TEST B — Memory (4 Mbyte DSIMM)

The diagnostics used for the 4 Mbyte memory DSIMM test all of the main

memory in the system. Therefore, any error for the memory must be

deciphered to determine which DSIMM contains the error. There may be

more than one module containing the error.

Running a Self-Test

A self-test performs a complete check of the memory in the system. The

results are stored in the conﬁguration table (T 50). To run a self-test:

1. Enter TEST B.

2. Enter TEST 50 to see the results.