Epson 440 Manuale Utente

The following sensor circuits are mounted in the Stylus Color 600 and selects appropriate operations
based on the returned information.

ASF Sensor:

An ASF sensor detects the position of return lever when the power is

(Photo)

turned on, and causes the paper to be picked up by the pick up roller
from the normal initial condition. (Refer to section 2.1.1.3 for detail.)

PE Sensor:

A PE sensor determines if there is paper in the printer. Based on the

      (Photo)

signal form this sensor, a particular paper edge treatment such as

                                                 Micro-weave printing is performed.

HP Sensor:

A HP sensor detects the carriage home position.

     (Photo)

It is used for managing printing position and cleaning, etc.

Thermistor Sensor:

A thermistor sensor keeps stable printing quality, changing PZT drive
voltage(VH) slightly according to changes of environmental

                                     temperature.

Cartridge Sensors:

Cartridge sensors are built into the Bk, CMY cartridge on the carriage
unit respectively to determine if the cartridge is installed or not when it
is exchanged or the power is turned on. In case of Stylus Color 600, 

the counter is reset at every time the cartridge is removed.

The figure below shows sensor circuit. Out of the data such as EPW with IEEE 1284 Nibble mode
to be returned to the host, the data to indicate ink consumption is calculated and managed by the
counter of the firmware. Therefore, it is omitted here.

CN11

CN4

CN5

1

2

3

HPV

GND

HP

PEV

GND

PE

1

2

3

1

2

3

ASFV

GND

ASF

+5V

+5V

+5V

3

2

1

E05B43

(IC2)

SW8

SW7

SW6

SW5

SW4

CCO(199)

BCO(201)

PE(203)

HP(205)

ASF(207)

CN8

CCO

BCO

CN8

THM

3

AN0

TMP95C061

(IC1)

+5V

20

18

Vref

AGND

17