Parallel Wrap - Lexmark E238 Service Manual

Parallel Wrap

This test is used with a wrap plug to check operation of the parallel port
hardware. Each parallel signal is tested.
To run the Parallel Wrap Test:
1. Disconnect the parallel interface cable, and install the wrap plug (P/N
1319128).
2. Select HARDWARE TESTS from Diagnostics Mode.
3. Select Parallel Wrap.
4. Select Parallel Wrap, Parallel 1 Wrap, Parallel 2 Wrap, or Parallel 3
Wrap.
The power indicator blinks, indicating the test is in progress. The test
runs continuously until canceled.
Parallel Wrap
P:######
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 00000 displays with the maximum fail
count being 99,999.
5. Each time the test finishes, the screen updates. If the test passes, the
pass count increases by 1, however if the test fails, a message displays
for approximately three seconds. One of the following failure messages
may display:
Sync Busy Error
Byte Interrupt Request Error
Strobe Interrupt Request Error
Init Fail Error
Init Busy Error
Host Busy Error
RAM Data FF Error
RAM Data AA Error
RAM Data 00 Error
RAM Data 55 Error
DMA Count Error
DMA Address Error
DMA Interrupt Error
DMA Memory Error
F:#####
Diagnostic aids—E340 and E342n
4511-xxx
3-25