Head Voltage Id Input - Epson Stylus Photo 720 Service Manual

EPSON Stylus Photo 720 / EPSON Stylus Photo EX3

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.
Perform this adjustment when the following repair / service is
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C H E C K
made.
P O I N T
Replacing the Head
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Replacing MAIN board
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Replacing Printer Mechanism
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Perform the adjustment items described in Table 5-1 according
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to the replacement parts in the specified order.
1. Select "Head voltage ID input" from the adjustment program main menu. The screen
below appears.
Figure 5-9. Head Voltage ID Input
Adjustment
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.
C H E C K
P O I N T
Adjustment by Adjustment Program
Figure 5-10. Check Present Data
Check the present head voltage ID before you replace the MAIN
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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.
When you read out the head voltage ID by executing "Check
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present data" function, write down the head voltage ID and input
the data in EEPRM, using "Change data" function.
The head voltage ID is labeled on this printer: you can check the
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head voltage ID by shifting the CR unit to the I/C replacement
position without executing "Check present data" function.
Revision A
101