Vh Voltage Writing Operation - Epson Stylus Color 400 Service Manual

EPSON Stylus Color 400 Service Manual

4.2.2.3 VH Voltage Writing Operation

There are dispersion in the PZT which are used for print head. It is necessary to set available and
appropriate printing by registering mean values(VH voltage) of these PZT dispersion in the EEPROM.
Therefore, when the next operations are done, it is necessary to confirm VH voltage ID and to register
to EEPROM on the main board by the program.


When exchanging the print head


When exchanging the printer mechanism


When exchanging the C206 main board


Before or after performing this operation, refer to the table 4-2 and perform appropriate
adjustments or operations.
1. When exchanging parts above, make a note of VH voltage ID that is appointed in advance.

Indication position of the Print head

Indication position of the printer mechanism
2. Connect the printer and PC and turn on the printer. Install the newly just opened black and color link
cartridge. (If C206 main board is exchanged, initial ink charge is performed automatically.)
3. Insert the disk of adjustment program to the floppy disk drive of PC. Type Load" a:\J80C10E and
press the return key.
4. After running the adjustment program, press the return key on the menu [Screen-1] indicated
on the PC screen. Then, press the return key again on the [Screen-2].
5. Select "1"(WORLD) on the Customer [Screen-3].
6. Input "2" (Cartridge) on the ink supply method selection screen, [Screen-4] and press the return key.
Note) Do not press "1"(Jig) at this point, because it consumes ink more than necessary.
7. Initial menu screen [Screen-5] appears. At this point, select "1"(Production).
8. On the main screen [Screen-6], select "1"(VH setting). Input "0" in the M/C No. of the [Screen-7]
and press the return key.
9. Input VH(3-code) that you made a note of VH voltage ID to the [Screen-8]. If you input wrong, press
the space key and restart from procedure 7. After checking if correct selection is made, press the
return key and return the screen to the main menu [Screen-6]. At this time, printer mechanism
performs initialization.
10. When you perform only VH voltage input, turn the power off after completing initialization and
register input value to the EEPROM. If you want to continue adjustments such as angular adjustment
or Bi-d adjustment, using this program, perform the next adjustment on the main menu screen
[Screen-6] without turning power off here.


Since [Screen-1] through [Screen-6] are attached in the end of this chapter, refer to them for
procedures above.
4-6
CAUTION
: VH voltage ID is stamped on the side face
of the print head.
: VH voltage ID is written on the label of the
packing box of the printer.
CAUTION
Rev. A