Hitachi UX Twin Nozzle Service Manual page 338

6.5.14a (N1) Failure of adjustment of excitation voltage
Failure of adjustment
of excitation voltage
Is the EZJ125 board CN5
connector disconnected or
in poor contact?
No
Is "EZJ125 A"
or "EZJ125 B"
correct?
No
Attach correct board.
(*1): When you replace EZJ133 board,
refer to [Replacement procedures
of EZJ133 board] in "3.3.1 EZJ133
board (MPU board)".
(*2): When you replace EZJ125 board,
refer to [Replacement procedures
of EZJ125 board] in "3.3.5 EZJ125
board (Nozzle1 drive board)".
(*3): When you replace the printhead,
refer to "4.13
Replacement Procedure".
[Caution]
Be sure to check that there is no wrong
connection of harnesses by referring to
[Connector numbers and Identifying
method of harnesses]
Electrical Connection Diagram".
Yes
Is DSW1 of
EZJ125 board
set properly?
No
Change DSW1 setting.
Print Head
in "3.3.20
Disconnect EZJ125 board CN5
connector once, and reconnect it
correctly.
Yes
Is the excitation
Yes
frequency
properly set?
No
Correct the excitation
voltage setting.
1
Replace the EZJ125 board.*2
Yes
Is the problem
fixed?
No
Replace the EZJ133 board.*1
Yes
Is the problem
fixed?
No
Replace the Nozzle.
Yes
Is the problem
fixed?
No
Replace the print head.*3.
Resume the
operation.
6-96
Resume the
operation.
When the adjustment
fails, is the voltage of
TP14 larger than
360V?
No
Replace the EZJ133 board.*1
Yes
Is the problem
fixed?
No
Replace the EZJ125 board.*2
Yes
Is the problem
fixed?
No
Replace the Nozzle.
Is the problem
fixed?
No
Replace the print head.*3.
Yes
1
Yes