Hitachi IJ UX, Service Manual

Page: 33 / 308

2-13
2.3.4 Auto phase gain adjustment
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The gain of the auto phase detection voltage is automatically adjusted.
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Perform this adjustment after confirmation that the periphery of a gutter part within the nozzle
head is not made dirty with ink or the like and the printing head cover is correctly fixed.
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Be sure to perform this adjustment in the case of replacing the boards (EZJ126, 125, 128) or the
nozzle (including the print head) or changing the ink type.
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Perform this adjustment before “Excitation voltage setting”. After setting the optimum
excitation voltage, repeat this adjustment.
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This adjustment is performed when the IJ printer is in a “Drop adjust” or “Standby” state.
1 Press Adjustment/operational checkout on the maintenance menu.
If Adjustment/operational checkout is not displayed on the maintenance menu, set the
service personnel maintenance mode on the login user selection screen.
The adjustment/operational checkout menu is then displayed.
2 Press Auto-phase gain adjustment.
The auto-phase gain adjustment screen then appears.
For information on changing to the service personnel maintenance mode,
refer to “2.1 Setting of service personnel maintenance mode.”
Manual
Start
up
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Adjust./oper. checkout
Excitation
adjustment
Charge voltage
confirmation
Phase margin test
Heating unit
confirmation
Auto-phase gain
adjustment
Level sensor
confirmation
[Standby ]
2015.07.07 12:45 Com=0
Auto-phase gain adjustment
Back
Adjust./oper. checkout
<Auto-phase gain adjustment>
40
Auto-phase gain value (2-62)
Automatic
acquisition
Proc. status:
[Standby ] 2015.07.07 12:45 Com=0
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Automatic acquisition