Ink System Management - Epson Stylus Pro XL Service Manual

Stylus Pro XL+ Service Manual

2.4 INK SYSTEM MANAGEMENT

This section explains how the ink system is managed to protect the printhead and the ink supply system and to
ensure high-quality output. Ink system operations are controlled by the following counters:
Protect counter
Ink consumption counter
2.4.1 Counters
EEPROM 93C46 (IC11) on the main board stores the counter values used for controlling ink system
operation.
2.4.2.1 Protect Counters
The values of protect counters A and B, C are stored in the EEPROM on the main board, and while the printer
is on, this data is also stored in the RAM on the main board.
Protect counter A
Protect counter A is reset:
1. Upon shipment from the factory.
2. After maintenance is performed (whenever you replace the ink drain tank).
Protect counter B, C
2.4.2.2 Ink Consumption Counter
This counter manages black and color ink consumption. The counter is counted up during printing,
automatically. It also counts compulsory head cleaning and the interval times between usage of the ink
cartridge. This counter is only reset by the installation of a new ink cartridge.
Rev.A
This counter manages the total amount of drained ink. If the counter value
is equal to or exceeds 51,000, the printer indicates an error on the control
panel indicating that maintenance is required.
Notes for Service
These counters set limits to prevent the user from frequent initial ink
charging. The counters values are stored in the EEPROM as flags and are
reset by the EEPROM reset function.
Operating Principles
2-11