Printer Initialization; Self-Test Printing Mode; Hexadecimal Dump Function; Monochrome Printing Mode - Epson Stylus Color 1520 Service Manual

1.4.7 Printer Initialization

This printer has three initialization types: Power-on initialization, Operator initialization, and Software
initialization.
Power-on Initialization
This printer is initialized when turning on the printer. Then the printer recognizes the cold reset command
(Remote RS command). When the printer is initialized, following actions are performed:
‰
Initialize the printer mechanism.
‰
Clears input data buffer.
‰
Clears download character set.
‰
Clears print buffer.
‰
Sets default values.
Operator Initialization
This printer is initialized when Pause button is pressed for 3 seconds, or the printer recognizes the /INIT
signal (negative pulse) of parallel interface. When the printer is initialized, following actions are performed:
‰
Clears input data buffer.
‰
Clears download character set.
‰
Clears print buffer.
‰
Sets default values.
Software Initialization
This initialization is performed by the ESC @ command and the following actions are performed:
‰
Clears the print buffer.
‰
Sets default values.

1.4.8 Self-test Printing Mode

This printer has the self-test printing mode. Following items are checked by performing this mode.
‰
Function for the control circuit board
‰
Function for the printer mechanism
‰
Print quality
The printer enters the LQ self-test printing mode by pressing the Load/eject button while turning on the
printer. To enter the draft self-test printing mode by pressing the LF/FF button while turning on the printer.

1.4.9 Hexadecimal Dump Function

Pressing the LF/FF and Load/Eject buttons while turning on the printer activates the hexadecimal dump
mode. Each line has Hexadecimal codes, along with their corresponding letters printed in the right column. If
a received code denotes an unprintable character such as a control code, "." (period) is printed in the right
column. This function enables users to check whether the data from the host is properly transferred. Turn off
the printer to exit the mode.

1.4.10 Monochrome Printing Mode

When the printer is in the ink end (color) condition, the black ink is substituted to continue to work. In order to
switch to monochrome printing mode, turn the printer off and back on. This mode is also selected by the
command "ESC (K)". The Color select command "ESC r" is ignored in this mode.
Product Description
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