40-6065 Laser Digital Level
Service Manual
Content
1 Disassembly of instrument
1.1 Disassembly of keypad parts
1.2 Disassembly of horizontal-angle sensor parts
1.3 Disassembly of laser parts
1.4 Disassembly of ruler body parts
2. Accuracy check and calibration
2.1 Accuracy check of horizontal angle
2.2
Accuracy calibration of horizontal angle
2.3 Accuracy check and calibration of laser spot
2.4 Accuracy check of included angle
2.5 Accuracy calibration of included angle
3. Electric connection drawing
4. Solutions for usual malfunctions
40-6065 digital level is a kind of high accurate instrument. If there are any malfunctions, the instrument must be
serviced by authorized dealers of JOHNSON, or back to our company for servicing. When you repair this instrument,
you should conform to this manual. Any unprofessional persons are not allowed to disassemble the instrument or
perform any internal servicing by themselves.
Figure 1: appearance of the instrument
1. Disassembly of instrument
1.1 Disassembly of keypad parts
(1) Loosen the lock knob (1-9#), and turn the angle square board (1-8#) by a certain angle.
(2) Screw off the 6pcs crosshead sunk bolts M2.5×8(1-6#), take off the keypad parts, and then pull out the terminal
pins of power, horizontal-angle sensor as well as include angle sensor.
(3) Tear out the membrane (1-3#), unclench the 3pcs bolt covers (1-7#), and disassemble the 6pcs crosshead plate
bolts M2.5×10(1-4#).
(4) Pull out the 6pcs connecting staffs (1-2#), then disconnect the keypad (1-1#) and main circuit board (1-5#).
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