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52. Test program
The following accessories must be available for conducting the test:
Foot control, buttonhole guide, full bobbin case, knee lift.
If a machine check is not possible, the operator is requested to perform a visual check.
The message visual check and the following text are displayed:
OK = button „+“
ERROR = button „-“
End = „i“ (also available in the „Full test“ mode)
The „+“ button serves as the „OK“ button and the „-“ button serves as „Error“ button.
The current test can be interrupted with the „i“ button.
If the „Full test“ mode is activated, only the next test will be automatically executed after pressing
the „Ok“ or „Error“ button.
All test results are recorded.
There are two ways of testing the machine with the aid of a test program:
I. Direct testing of the malfunctioning electronic assemblies.
II. Checking all assemblies in sequence, recording the results and displaying the test
results on the screen.
Test start
53. Display
The display memory is first checked.
Irregular patterns are displayed during this check.
Afterward, every 2nd pixel appears alternately on the display.
An evaluation window for visual check is displayed after completion of the test.
Please press now the relevant buttons:
either button „+“ = OK (test was successful)
or button „-“ = ERROR (test was not successful)
plus button „i“ = End (end of test with possibility to go to the next test)
The current test can be interrupted with the „i“ button.
If the „Full test“ mode is activated, only the next test will be automatically executed after pressing
the „+“ or „-“ button.
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