Epson 420i (performed only during the initialization operations)

Double-Strike Printing

In the double-strike mode, the second dot is printed 1/120 inch down from the initial dot on a vertical line. The double-strike process requires 2 passes of the printhead.

Example: (STANDARD) (DOUBLE-STRIKE)

Buffer

This printer is equipped with an 18K-byte communication buffer which allows the reception of data during printing. Thus, even for large data transfers the computer is free to perform other tasks.

Printhead Protection

During high-density printing, a heat detector within the printhead protects the coils from damage due to overheating, by reducing print speed. The sensor recognizes two temperature warning levels. At level one, a 200 ms pause in the print cycle occurs before the next line is printed. At temperature level two, a 5-second pause in the print cycle will occur, allowing the heat to dissipate. The ON-LINE lamp blinks during the 5-second halt.

RAM (Memory) Error Detection

(performed only during the initialization operations)

When a RAM error is detected, the buzzer sounds, the POWER lamp blinks, and the error state is entered.

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