Hitachi HT-4139-28 Maintenance Manual page 20

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3.3.7 Cleaning Platen
① Use gauze soaked in ethanol to wipe the ink
3.3.8 Cleaning the Photo Sensor (After cleaning the Photo Sensor, run the Auto Calibration
Test)
② Use gauze soaked in ethanol to wipe the tip of the Photo Sensor (Glass Part)
Platen
Emittor
Emittor
REV0 10.02.15
-H3-8-

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