9-8
Phaser 440 Color Printer
9
Checks and Adjustments
Top loss adjustment
Note
Perform this adjustment before performing the next adjustment
procedure “Leading edge (top) margin adjustment” on page 9-10.
This adjustment sets how far a sheet of media is inserted into the paper clamp
before it is clamped; this is called top loss. Consequently, it also set the print's
top margin by forcing where printing begins at the top of a page. The further the
media is inserted into the paper clamp, the larger the top margin will be. The
margin specification for the clamped end of the print is 11.5 mm (0.45 in.). The
specification for the unclamped edge of the print is 2.5 mm (0.1 in.).
1.
Turn off the printer. Ensure that the paper tray is filled with Letter
Extra paper.
2.
Remove the top rear cabinet panel to access the engine control board.
Refer to the Chapter 8 topic “Printer cabinet panels” on page 8-4.
3.
Press and hold the
TEST
button and turn on the printer. Release the
TEST
button. The printer is now in service mode.
4.
Toggle DIP Switch 1-8 to print a test print. Examine the top margin of
the print. If it measures 11.5 mm
±
0.5, then the margin is within
specification, go to Step 12. If not, continue with Step 5 to adjust the
top margin.
5.
Remove the print from the drum clamp.
6.
Set DIP Switches 1-3 and 1-4 off. Set DIP Switches 1-5, 1-6 and 1-7 on.
7.
Set DIP Switch 1-3 on to start the adjustment. LEDs
ERROR
and
JAM
blink rapidly to indicate the test is active. LEDs
RIBBON
,
COVER
,
and
READY
blink to indicate the currently set top margin adjust value
as indicated in the chart below.
Table 9-3 Top loss adjust settings
RIBBON
COVER
READY
Top
margin
adjust
value
DIP
Switch
settings
1-5
1-6
1-7
o
o
o
-1.5 mm
o
o
✺
-1.0 mm
↑
o
✺
o
-0.5 mm
↑
o
✺
✺
0
↑
↑
✺
o
o
0.5 mm
↑
✺
o
✺
1.0 mm
↑
↑
✺
✺
o
1.5 mm
↑
↑
✺
✺
✺
2.0 mm
↑
↑
↑