Technical data

10 Troubleshooting
The diagnostics used to test the 8 Mbyte memory module tests all of the
main memory in the system including the 4 megabytes on the system
module. Therefore, any error for the memory must be deciphered to
determine which module contains the error. There may be more than one
module containing the error.
Running a Self-Test
A self-test performs a quick checksum 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.
Self-Test Results
A code of 00XX.0001 next to the MEM mnemonic indicates no errors
(the XX is the total amount of memory installed in the system (in
hexadecimal)).
If an error is detected, refer to Section 2.2.1 to determine which module,
the system module or one of the memory modules, needs to be replaced.
Running the System Exerciser
The system exerciser performs a more thorough test of the memory in
the system (including the 4 megabytes on the system module). To run the
system exerciser:
1. Install a loopback on the communication port.
2. Enter TEST 80000106 and B.
3. Read the results on the screen during the test.
System Exerciser Results
A code of 0XXX.0001 next to the MEM mnemonic indicates no errors (the
XXX is the number of pages of memory tested during the last pass of the
exerciser (1 page = 512 bytes)).
If an error is detected, refer to Table 2–1 to determine which module, the
system module or one of the memory modules, needs to be replaced.