Write D/A Value; Adj Input Rank - Epson Stylus PRO 7500 Service Manual

EPSON Stylus Pro 7500

WRITE D/A VALUE

During the C299MAIN board production process, the head drive circuit parameters are
written to the USB EEPROM.
After service, these parameters must be transferred to the Flash-ROM.
NOTE: This operation should definitely be performed before starting a printing
job. If it is not done, it is possible that color irregularities could occur
during printing.
n
This operation should definitely be performed before starting a
printing job. If it is not done, it is possible that the uneven
printing could appear during printing.
n
This correction value exists in an area (in the Flash ROM) where
it is impossible to copy using parameter backup with a PC card,
so this operation should also be performed after parameter
backup / copy is completed when replacing the board.
1. Make sure "Write D/A Value" appears on the LCD and press Enter.
2. Press Enter again when "Press Enter to write" appears.
3. Turn off the printer when "Please turn off" appears.
Adjustment

ADJ INPUT RANK

This function allows you to enter the B head and C head ID's.
1. Make sure "Adj: Input Rank" appears on the LCD and press the Enter button.
2. Make a memo of the 6 digit ID printed on the head ID label affixed to the heads.
3. First, set the ID value of the B head (K/C/M). Specify the proper value using the [Paper
Feed + / –] buttons.
The numbers after the ID, 1 ~5 show the number of the position from the left side head
ID, and are set in order for each step.
After the B head ID value input is completed, pressing the Enter button causes the
program to switch to the C Head (Lc/Lm/Y) ID value setting display, so carry out this
setting next.
If there is a mistake in the setting value (a value outside the range is specified, etc.), it
result in an error. Press the [Enter] button to input the value again.
4. At the point when setting of the B and C head ID values, if the [Enter] button is
pressed, the message "Fill [Set] Execute" is displayed. Here, if the [Enter] button is
pressed, the ID setting values are updated in the C299MAIN board and initial filling
processing is started, with the head filling operation starting.
If the print head has not been replaced yet, initial filling is not
necessary, so when message "Fill [Set] Execute" is displayed, if you
press the "Pause" button, you can skip the initial filling processing.
Adjustment Steps
Revision A
195