Hitachi UX Twin Nozzle, Service Manual

Page: 35 / 355

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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 (EZJ125, 128, 133, 134) ,
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
“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 N1
Phase margin test
Heating unit
confirmation
Charge voltage
Confirmation N2
Auto-phase gain
adjustment
Level sensor
confirmation
[Stop ]
2018.07.07 12:45 Com=0
Charge voltage confirmation