Hitachi IJ PH, Service Manual

Page: 25 / 211

3 When the automatic adjustment is not normally completed, the following
factors are considered. Confirm whether or not each part is normal.
- The connection of EZJ93 board and EZJ106 board is insufficient.
- The dip switch on the EZJ106 board is wrongly set.
- The connection of a coaxial cable connector for excitation (EZJ106 CN5) is
insufficient.
- Replacement parts (boards of EZJ93 and 106, nozzle and head cable) are out of
order.
When failed in the automatic adjustment, the manual adjustment key is displayed.
When the manual adjustment key is pressed, a numerical value is manually put
into the excitation voltage adjusted value and the Apply key is pressed, the excitation
voltage value is increased and decreased.
Confirm a waveform of TP14 (excitation voltage) of the EZJ106 board by an
oscilloscope.
Model Vp-p
PH-D, 360
+/-20V
With respect to positions
of the board and the test
pin, refer to "3.3.2 EZJ106
board".
When failed in the
automatic
adjustment, the
“manual
adjustment” is
displayed.
Apply
Proc. status:In progress
[ 0 7 6 0 ]
Proc. status:Failed
[Waveform of excitation voltage]
Vp-p
2-7