Hitachi IJ RX2 Service Manual page 150

4.9.5 Proximity sensor replacement procedure
Replace the single proximity sensor when it is faulty.
Caution: Perform replacement only after turning power off.
Do not spill the intensifier over the proximity sensor: Doing so could
cause a fault.
1 Remove the viscometer from circulation unit, referring to item 4.9.1.
2 Remove the cover setscrew, and then take out the proximity sensor.
3 Install a new proximity sensor in the viscometer.
Caution: Install the proximity sensor making sure that the model indication
surface faces the rear. While pushing the cover in the Q direction as
shown in the illustration, tighten the cover setscrew (to determine the
position of sensor).
4 Return the viscometer to its original position, referring to item 4.9.4. (Take care not to forget
to plug in the connectors of lead wires.)
Caution: After replacing the proximity sensor, it is necessary to replace the ink
and calibrate the viscometer (see "2.6 Calibration of viscometer").
Proximity sensor
Cover setscrew
4.9.6 Replacing thermistor
1 Remove the viscometer from circulation unit, referring to item 4.9.1.
2 Remove the screw holding the thermistor fixing plate, and then replace the thermistor.
Caution: When installing new thermistor, moisten the O-ring with intensifier to prevent it
from being scratched.
3 Return the viscometer to its original position, referring to item 4.9.4.
Caution: After replacing the thermistor, it is necessary to replace the ink and
Cover
Cover
Model indication surface
calibrate the viscometer (see "2.6 Calibration of viscometer").
Tighten the screw
Q
while pushing the
cover.
Cover
4-26
Proximity sensor