Hitachi HT-4139-28 Maintenance Manual page 21

REV0 10.02.15
3.3.9 Cleaning the Ultra Sonic Sensor
Use brush to clean the dust off of the Ultra Sonic Sensor (Front)
『 Note 』 Do not apply any liquid. Applying resin on the surface of the sensor may change or affecting the
performance of the Scanner.
Do not apply pressure. The sensor may shift and it may cause errors
Receptor
Transmitter
3.3.10 Cleaning the Hopper Guide
Grab the Part "A" of the Hopper Guide as shown below, and slide it to the direction of the arrows. Check
if it slides smoothly.
Ａ
3.3.11 Cleaning the Scanner ASSY
8.3.5 Remove the Scanner ASSY from the device. For instructions, please refer to "8.3.10 Replacing
the Scanner ASSY (Back)". Clean the debris on Mirror No. 1~3 and the Lens using the brush.
Caution: Please refer to "8.3.5 Replacing the Scanner ASSY" and "8.3.10 Replacing the Scanner ASSY
(Back)"
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