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3.3.2 EZJ94 board / EZJ106 board (NH board)
3.3.2.1 EZJ94 board
【Function】
●Control of nozzle (charging voltage control, excitation voltage, APH detection, PTC
control and the like) is performed.
【Setting of switch/check point/LED display and the like】
●Setting of switch
Nozzle size
６５μm
ＤＳＷ１
Remarks Both of bits are put on the bottom.
●Check point/LED
Reference
number
Name Content
TP1 APH signal Charged amount detection signal of ink particles.
TP3 GND Ground (for APH)
TP12 charging signal Character signal charging ink particles
TP13 GND Ground (for charge/excitation)
TP14 Excitation signal Sine wave signal applied to a nozzle
TP15 PTC signal PTC drive signal.
LED1 APH signal APH signal for confirmation.
【
Note at the replacement】
●
When replacing boards, be sure to cut off the power supply.
●
Set up DSW 1 according to the nozzle diameter.
●
After replacing the board, confirm the charging voltage.
●
Perform the excitation adjustment.
●
Perform the auto phase gain adjustment.
〔
EZJ94 board external views〕
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”.
The EZJ94 board has a portion where high voltage is applied. When
performing the adjustment in a state where the Electric Component cover is
opened, be fully careful about an electric shock.
Caution against an electric shock
With respect to the
excitation adjustment,
refer to “2.3.1 Excitation
adjustment”.
Mark
With respect to the
excitation adjustment,
refer to “2.3.1 Excitation
adjustment”.
Three setscrews
Protective
cover
ＴＰ１４：Excitation signal
ＴＰ１３：Ground
TP12: Charging signal
ＴＰ３：Ground
ＴＰ１：
PH signal
ＴＰ１５：PTC signal
ＤＳＷ１
Three setscrews
Two studs for fixing
a protective cover
Three setscrews
Two studs for fixing
a protective cover
(Marked side）
ＬＥＤ１
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