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2-89 4059 Service Manual
4059-XXX
Parallel Port Service Check
Run the “Parallel Wrap Test” on page 3-11.
Note: The Parallel Wrap Test is designed to check the parallel port
hardware by using a wrap plug (P/N 1319128) and invoking the
Parallel Diagnostic Test. This test helps isolate the printer from the
parallel cable and host. The test provides failure information on the
display for approximately 3 seconds. If the test indicates that a
problem is detected, replace the controller board.
Printhead Service Check
The printhead assembly does not contain any service replaceable
parts or components. If service error code 930 displays, the wrong
printhead is installed in the printer.
Service Error Code Explanation
1 Error Code 931
No first HYSNC Signal
Error Code 932
Lost HYSNC
These errors usually indicate a
failure in the HYSNC signal to the
printhead. Check the continuity of
the cables connected to J3 and J8
on the engine board. If incorrect,
replace the defective cable. The
voltage at J8-4 measures
approximately +5 V dc. If incorrect,
replace the engine board. The
voltage at J3-7 measures
approximately +24 V dc. If incorrect,
replace the engine board. If correct,
replace the printhead assembly.