Test Print - Canon LBP-1120 Service Manual

C. Test Print
Test print is divided into two types: engine test print and controller test print.
If an image defect occurred in this printer, make a test print and assess the abnormality of the printer.
1. Engine Test Print
Test print contains the test pint pattern as shown in Figure 4-1-3.
Follow the procedures below to make a test print.
1) Load paper into the printer and switch the power ON.
2) When the printer is in the STANDBY mode, press the test print switch (pointed by the arrow in Figure 4-1-2) with
a precision flat-blade screwdriver, and print a test print (shown in Figure 4-1-3.)
Figure 4-1-2
3) Identify the contents of the failure from the test print and rectify the problem according to the action procedures of
image defects. Test pattern can be printed continuously as long as the test print switch is held down.
Note:
Use paper with the width of B5-size or above for a test print.
CHAPTER 4
Figure 4-1-3
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