Hitachi IJ RX2 Service Manual page 94

With respect to the
charging voltage
confirmation, refer to
"2.3.2 Charging voltage
confirmation".
With respect to the
excitation adjustment,
refer to "2.3.1 Excitation
adjustment".
With respect to the auto
phase gain adjustment,
refer to "2.3.4 Auto phase
gain adjustment".
(3) Remove the connectors from CN4, CN6 and CN7.
(4) Remove the EZJ125 board.
*) At first, remove the fixing screws (2 positions). Then as the drawing below, push the
hook of fixing spacer of EZJ125 board and pull up the EZJ125 board. (Two spacers)
Pull up the
EZJ125 board
(5) Remove the spacer from EZJ125 board.
*) As the drawing below, push the hook of fixing spacer and pull up the spacer
(Two spacers)
(6) Remove the connectors from CN2, CN3 and CN5.
(7) Replace the EZJ125 board and then install the each part by reversing the above
procedure.
(8) Set up DSW1 and DSW2 according to the nozzle diameter.
(9) Confirm the charging voltage.
(10) Perform the excitation adjustment and the auto phase gain adjustment.
[EZJ125 board external view]
Two spacers for fixing
EZJ125 board
DSW1
DSW2
Two fixing screws
The EZJ125 board has a portion where high voltage is applied. In order to avoid an
electric shock, be sure to turn off the power and wait for at least 10 seconds before
accessing the EZJ125 board.
Push the hook
Pull up the
spacer
Push both sides of hooks
両端のツメ部を押す
TP14:
CN5
Excitation signal
LED1
Caution against an electric shock
3-19
EZJ125 board
Spacer for fixing
the EZJ125 board
EZJ126 board
Spacer for fixing
the protective cover
EZJ125 board
TP12: Charging signal
Two spacers for fixing
EZJ125 board
Two spacers for fixing
a protective cover
TP15: PTC signal
TP1: APH signal
TP3: Ground
Two spacers for fixing
a protective cover
Two fixing screws
CN3
CN2