DEWALT DW074LR T2 Red Rotary Laser Instruction Manual

DW074LR T2 & DCE074R T2
Series Service Manual
( V1.0/2023)

DW074LR T2 Red Rotary Laser

Maintenance step

1. Remove the rotating assembly along the reverse side of the light outlet
2. Remove the rubber sleeve from the bracket
3. Remove 4 screws to take off Connecting Plate
4. Remove 4 screws and 3 self-tapping screws to take off top cover.
5. Remove 4 screws and 3 self-tapping screws to take off Mid Section.
6. Below is a list of the main parts. Replace or repair these parts according to the troubleshooting section.

connection
cable ,or replace the Membrane Switch| 906139 OPP2-keypad-001 Membrane Switch
Calibration can’t saved| Replace the storage IC| Main PCBA
Calibration limit beyond precision scope| Adjust the compensation glass| /
Weak beam| Replace the laser| 907257 OPP-01-01 88 Main Laser Module (DW074LR)
906482 MPP-01-01 88 Main Laser Module (DCE074LR)
Uneveling| Replace stepping motor| 904290 NRL800HT-01-02 04 Stepper Motor
Light is out of working| Replace the Membrane Switch| 906139 OPP2-keypad-001 Membrane Switch
Unit won’t receive remote control signal.| Check receiver connection cable| /
Vertical application defective| Check z-axis bubble circuit board connection cable ,or replace the Membrane Switch| 906139 OPP2-keypad-001 Membrane Switch
Rotation head loose from frame.| Fasten the screw| /
Battery indicator lights flash| Battery voltage is low, need to recharge| /
No alarm| Replace Main PCBA| Main PCBA
Button doesn’t work| Data cable looses ,reinstall the data cable| /
Scan function defective| Replace Counter Photo-Eye PCBA| 905243 NRL-ECV-001 A20 Counter Photo-Eye PCBA
Slope out of tolerance| Loosen the four M2.5 screws on the Main PCBA. Move the Main PCBA left or right to correct the slope. Tighten the screws.| /
Unable to enter the calibration mode| Replace main PCBA| Main PCBA

Calibration Instruction

1. Install the battery, long press the SLOPE BUTTON , meanwhile short press the POWER BUTTON   . Hold the SLOPE BUTTON until POWER BUTTON released. All the indicators will light up , indicating instrument is in calibration mode;
2. When enter calibration mode, the unit will auto select X direction. Calibrate the laser through UP/DWON BUTTON .   Press and hold Slope button to save the calibration value. The rotating laser will flash 3 times.
3. Press and hold RPM BUTTON   (Press time≥3s) to switch to Y axis. Repeat STEP2 to calibrate Y axis. The two values in X and Y need to be saved separately.
4. Short press to exit the calibration mode or power off the rotary directly.

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