THEORY
SERVICE MANUAL
Electrical
2-11
6. Printer Control
6.1. Ink Jet Head Control
The ink jet head drive circuit is shown in Fig. 2.9. The ink jet head has 50 active
nozzles (monochrome). Two addressable multiplexing printer drive circuits (#2, #3)
activate the nozzles for printing. Custom circuitry controls the timing and
synchronization of ink deposited as the cartridge moves across the paper in printing.
The same system controls ink jet head maintenance (spitting into the trough).
Fig. 2.9 Ink Jet Head Drive Circuit
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