Xerox 4090 User Manual
Page 120
SOLVING PROBLEMS
Diagnostic Test 01
The built-in Diagnostic Test 01 is used to verify a malfunction
when a fault code indicates transport failure. Test 01 should be
performed prior to calling for service because the information
obtained assists the service representative. As soon as a problem
becomes evident through fault code messages, record or log all
fault messages so that the service representative can determine
not only the type of malfunction but also the circumstances
under which the fault occurred.
Follow these steps to perform Diagnostic Test 01:
1. Press the Power switch off and then on. This causes the tape
drive to perform a diagnostic self-check. If a fault is
indicated at this time, do not attempt further testing. Place a
service call.
2. Thread a scratch tape through the tape path and onto the
take-up reel but do not load it.
Note: A scratch tape is a tape of known good quality that
has no needed data written on it. It must have a write-
enable ring installed because Test 01 performs the read/write
function during its operation.
CAUTION: The use of anything other than a scratch tape
while performing any diagnostic test could result in severe
data loss. Always install a scratch tape of known good quality
before performing any diagnostic tests.
3. Close and latch the door.
4. Press the Reset switch.
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XEROX 4050/4090/4450/4650 LPS OPERATOR GUIDE