Hitachi UX Twin Nozzle Service Manual page 339

6.5.14b (N2) Failure of adjustment of excitation voltage
Is DSW1 of EZJ134 board
set properly?
(*1): When you replace
board, refer to [Replacement
procedures of EZJ133 board] in
"3.3.1 EZJ133 board (MPU
board)".
(*2): When you replace
board, refer to [Replacement
procedures of EZJ134 board] in
"3.3.6 EZJ134 board (Nozzle2
drive board)".
(*3): When you replace
printhead, refer to "4.13 Print
Head 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] in
"3.3.20 Electrical Connection
Diagram".
Failure of adjustment
of excitation voltage
Is the EZJ134 board CN1
connector disconnected or
in poor contact?
No
Yes
No
Change DSW1 setting.
EZJ133
EZJ134
the
Disconnect EZJ134 board CN1
Yes
connector once, and then
reconnect it correctly.
Is the excitation
frequency set
properly?
No
Correct the excitation
voltage setting.
1
Replace the EZJ134 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.
6-97
Resume the
operation.
When the adjustment
Yes
fails, is the voltage of
TP14 larger than
360V?
No
Replace the EZJ133 board.*1
Yes
Is the problem
fixed?
No
Replace the EZJ134 board.*2
Yes
Is the problem
fixed?
No
Replace the Nozzle.
Yes
Is the problem
fixed?
No
Replace the print head.*3
Yes
1