Epson TM-C7500 Series Technical Reference Manual page 23

Setting the Nozzle Verification Technology Enable / Disable
Enable / Disable of Nozzle Verification Technology is set.
The factory setting is "Enable".
Settings
It can be set from the setting menu of the product and PrinterSetting.
See "Setting panel switch" on page 82
Setting Nozzle check interval
Every time the number of printed copies has been reached, the printing operation will be stopped
temporarily and the device will perform an auto nozzle check.
Settings
It can be set from the setting menu of the product and PrinterSetting.
Able to set in the unit of pages from 1 to 500
See "Setting panel switch" on page 82
Setting Threshold of clogged nozzles
Set the allowable number of nozzle dropouts when executing a Nozzle Verification Technology.
When the number of nozzle dropouts exceeds the value, a head cleaning is executed.
If the number of clogged nozzles does not reach this value, the dot substitution function is activated
instead of performing head cleaning.
Settings
It can be set from the setting menu of the product and PrinterSetting.
Can be set between 0 to 10 nozzles
See "Setting panel switch" on page 82
 The allowable number of nozzle dropouts is the total for the nozzles 
for all four colors (CMYK).
 The value initially set for the allowable number of nozzle dropouts is "6".
or "PrinterSetting" on page 89
or "PrinterSetting" on page 89
or "PrinterSetting" on page 89
Chapter 1 Product Overview
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