Hitachi HT-4139-28 Maintenance Manual page 97

REV0 10.02.15
■ Replacing the Sensor (PC52 Emission） ） ） ）
① Remove the Top Cover, the Main Cover (L)(R), the Side Cover(L) (R), and the Back Cover. For
instructions, please refer to "8.1 Preparation"
② Disconnect the sensor from the middle connector, then unscrew 1 hexagonal screw from the Sensor
(PC52 Sensor), remove the clips attached to the Sensor ( PC52 Sensor) and remove the Sensor
③ Attach new Sensors
④ Take the reverse steps to attach the Sensor
⑤ After replacing the part, run Auto Calibration Test
■ Replacing the Reflection Sensor（ （ （ （ PC42） ） ） ）
① Remove the Top Cover, the Main Cover (L)(R), the Side Cover(L) (R), and the Back Cover. For
instructions, please refer to "8.1 Preparation"
② Disconnect the Reflection Sensor from the middle connector, then unscrew 1 hexagonal screw from the
Reflection Sensor (PC42 Sensor) and remove the Reflection Sensor
③ Attach new Reflection Sensors
④ Take the reverse steps to attach the Sensor
⑤ After replacing the part, run Auto Calibration Test
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Tools Needed: Magnetic Philips Screwdriver (No.2)
#55 Sensor (PC52 Emission）
Tools Needed: Magnetic Philips Screwdriver (No.2)
#56 Reflection Sensor
（PC42）
hexagonal screw
Hook
hexagonal screw