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3-8 Service Manual
CACHE Test
This test is used to verify the printer processor cache.
To run the CACHE Test:
1. Select CACHE TEST from HARDWARE TESTS.
The message CACHE Test Testing… displays. Then the message Resetting Printer appears.
2. The printer automatically performs a Power On Reset (POR). While the CACHE test executes, the power
indicator blinks green.
The following type of message appears:
• P:###### represents the number of times the cache has passed and finished successfully. Initially
000000 displays with the maximum pass count being 999,999.
• F:##### represents the number of times the cache has failed and finished with errors. Initially 0000
displays with the maximum fail count being 99,999. Initially only four digits appear, but additional
digits appear as needed.
Each time a test is completed, the number of passes and failures is incremented. If the test fails, the
message Failure displays for approximately three seconds, and the failure count increases by one.
The test continues until all of the printer processor’s cache has been tested. Once the maximum pass count or
fail count is reached, the test is stopped, the power indicator is turned on solid, and the final results display.
To stop this test before completion, turn the printer off.
Parallel Wrap tests
This test is used with a wrap plug to check operation of the parallel port hardware. Each parallel signal is tested.
Use Parallel Wrap for the standard parallel port, Parallel 1 Wrap if a parallel port is available by PCI slot 1, or
Parallel 2 Wrap if a parallel port is available by PCI slot 2.
To run the Parallel Wrap tests:
1. Disconnect the parallel interface cable, and install the wrap plug (P/N 1319128).
2. Select Parallel Wrap, Parallel 1 Wrap, or Parallel 2 Wrap from the HARDWARE TESTS menu.
The power indicator blinks green indicating the test is in progress. The test runs continuously until a
maximum number of tests is reached.
• P:###### represents the number of times the memory test has passed and finished successfully.
Initially 000000 displays with the maximum pass count being 999,999.
• F:##### represents the number of times the memory test has failed and finished with errors. Initially
0000 displays with the maximum fail count being 999,999. Initially only four digits appear, but
additional digits appear as needed.
Each time the test finishes, the screen updates. If the test passes, the pass counter increases by 1,
however if the test fails, a message displays for approximately three seconds. Once the maximum count is
reached, the test stops. The power indicator goes on solid, and the final results display.
To stop the test before completion, press Stop ().
CACHE Test x100
P:###### F:####
Parallel Wrap
P:###### F:####