Epson Stylus Photo 720, Service Manual

Page: 101 / 154

EPSON Stylus Photo 720 / EPSON Stylus Photo EX3 Revision A
Adjustment Adjustment by Adjustment Program 101
5.3.5 Head Voltage ID Input
With this program, you can adjust the driving characteristics of the PZT for each head
to unify the amount of ejecting ink. Input the head voltage ID determined by the
measurement of PZT driving characteristics to EEPROM by this program.
1. Select “Head voltage ID input” from the adjustment program main menu. The screen
below appears.
Figure 5-9. Head Voltage ID Input
2. Before replacing the MAIN board, select “Check present data” in the screen above and
click “OK”: You can check the present head voltage ID stored in EEPROM. If you
replace the MAIN board, go to the step 3.
Figure 5-10. Check Present Data
C H E C K
P O I N T
n
Perform this adjustment when the following repair / service is
made.
n
Replacing the Head
n
Replacing MAIN board
n
Replacing Printer Mechanism
n
Perform the adjustment items described in Table 5-1 according
to the replacement parts in the specified order.
C H E C K
P O I N T
n
Check the present head voltage ID before you replace the MAIN
board. If the logic circuit is normal, you can read out the present
data by this program. This allows efficient work since you do not
have to check the head Voltage ID visually.
n
When you read out the head voltage ID by executing “Check
present data” function, write down the head voltage ID and input
the data in EEPRM, using “Change data” function.
n
The head voltage ID is labeled on this printer: you can check the
head voltage ID by shifting the CR unit to the I/C replacement
position without executing “Check present data” function.