42114101 Rev.1
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2.2.3 Head gap adjusting (See Figure 2-5.)
The head gap adjusting lever moves back and forth to tilt the carriage frame, altering the gap
between the printhead and the platen.
The adjusting screw, which is connected to the adjusting gear rotates when the adjusting lever
is moved creating a fine gap adjustment. If the adjusting gear is pushed down, the adjusting
screw can be turned with a screw driver to change the coarse gap adjustment.
When the adjusting lever is set to range
➁
~
➄
the contact which is attached to the under side
of the carriage cover will connect with the contact of the space motor PC board. The printer
will reduce the printing speed automatically to ensure that adequate printing pressure is maintained
for multipart paper.
And, the adjusting cam adjusts the headgap toward left and right side in accordance with the
guide rail up and down as a position of the left end of it.
Summary of Contents for ML490 Series
Page 1: ...42114101 Rev 1 1 135 ML490 491 PRINTER Maintenance Manual ODA...
Page 2: ...42114101 Rev 1 2...
Page 38: ...42114101 Rev 1 38 Drive gear Ink tank Ribbon cartridge Figure 2 6...
Page 48: ...42114101 Rev 1 48 Change arm Change lever Platen Release cam Figure 2 13 REAR TOP BOTTOM...
Page 96: ...42114101 Rev 1 96 9 Carriage Assy NK2 10 SUS Bearing portion of guide roller EM 30L B...
Page 119: ...42114101 Rev 1 119 6 8 9 7 1 2 3 11 10 4 5 Figure B 2 Printer General Assy...
Page 124: ...42114101 Rev 1 124 9 12 11 1 13 3 7 1 14 5 6 7 2 10 8 Figure B 4 Carriage Assy...