Hitachi IJ PH, Service Manual

Page: 26 / 211

2.3.2 Charging voltage confirmation
- This confirmation is performed in a “Stop“ state.
- Confirm when performing the board exchange (EZJ93 and 106).
1 Press adjustment/operational checkout at the second page of the
service maintenance screen.
When the previous menu and the next menu are not displayed in the
maintenance menu, set to the service personnel maintenance mode by the
password protection.
2 Press Charge voltage confirmation.
Since the voltage for the confirmation is output for 3 minutes, measure the TP12
on the EZJ 106 board using an oscilloscope and confirm that the TP12 is in the
range of DC 250V plus or minus 15V.
After the completion of the
confirmation, the work can
be stopped before the
passing of 3 minutes by
pressing the Abort key.
With respect to the
password protection,
refer to 2.1 setting of
service personnel
maintenance mode.
With respect to positions of
the board and the test pin,
refer to "3.3.2 EZJ106
board".
[Waveform of charge voltage confirmation]
Charge voltage
GND level
2-8