Ricoh D124-17 Service Manual page 22

Improved Productivity
During black-and-white printing [A] only the K1 print head (1) and K2 print head (2) are used. These
black print heads are offset so they can cover a wider band with black ink. This increases printing speed
because a wider band can be covered with one pass in a monochrome print.
During color printing [B] the K2 (3), C (4), and YM (5) print heads are used. The band is narrower
because the forward sitting K1 print head is not used.
The K1 print head (H1) sits forward of the K2 print head (H2) in the direction of paper feed. This allows
a greater band of coverage during monochrome printing. Three nozzles at the rear section of K1
and three nozzles at the front section of K2 overlap the same area on the paper. However, the
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