Hitachi HT-4139-28 Maintenance Manual page 79

REV0 10.02.15
8.3.6 Replacing the SS-Sensor (Ultra Sonic Sensor)
① Remove the Main Cover (L), the Side Cover (R). For instructions, please refer to "8.1 Preparation"
② Unscrew 2 screws on the Main Button ASSY and remove the Main Button ASSY.
③ Unscrew 1 bind-head screw on the Ultra Sonic ASSY (Receptor) and remove the Ultra Sonic ASSY
(Receptor)
④ Remove the cable inside the Ultra Sonic ASSY (Receptor). Disconnect and replace the connector attached
to the SS-Sensor
⑤ To attach the SS-Sensor, take the reverse steps of ④and③. When attaching the Ultra Sonic ASSY
(Receptor), push it in the direction of the arrow then screw the screws.
SS-Sensor ASSY（Receptor）
⑥ Unscrew 1 bind-head screw on the Ultra Sonic ASSY (Transmitter) and remove the Ultra Sonic ASSY
(Transmitter)
⑦ Remove the cable inside the Ultra Sonic ASSY (Transmitter). Disconnect and replace the connector
attached to the SS-Sensor
⑧ To attach the SS-Sensor, take the reverse steps of ⑦and⑥. To attach the Ultra Sonic ASSY (Receptor),
push it in the direction of the arrow then screw the bind-head screw.
Ultra Sonic ASSY (Transmitter)
Ultra Sonic ASS Y (Transmitter)
Connector Connector SS-SENSOR
⑨ Take the reverse steps of ②,① to attach the Main Button ASSY.
⑩ After replacing the part, run the Auto Calibration Test. (refer to Chapter 6)
-H8-16-
#35 Main Button ASSY
Bind-head screw
SS-Sensor ASSY（Receptor）
#69 SS-SENSOR
Tools Needed: Magnetic Philips Screwdriver (No.2)
Bind-head
screw
Bind-head screw