DeWalt DW074LR T2 Series User manual

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

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Main part diagram
Top Cover
Mid Secon
Base
Baery
Keypanel
Tripod
Aachment
Rotating
components

components
Rotating
components
Rotating
1. Remove the rotating assembly along the reverse side of the light outlet
Rubber sleeve
2. Remove the rubber sleeve from the bracket
Rubber sleeve
Remove the rotating assembly along the reverse side of the light outlet
Maintenance step
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4. Remove 4 screws and 3 self-tapping screws to take off top cover.
3. Remove 4 screws to take off Connecting Plate
Connecting
Plate
4 x Screws
Top cover
4 x Screws
3 x Self-tapping
Screws

5. Remove 4 screws and 3 self-tapping screws to take off Mid Section..
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4 x Screws
3 x Self-tapping
Screws

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6. Below is a list of the main parts. Replace or repair these parts
according to the troubleshooting section.
Counter
Photo-Eye PCBA
Alarm Spring
Stepping motor
A&B
Supporng
Frame
Compensaon
glass
Upper motor
Main PCBA
Four M2.5
screws
907250 NRL-MB-005_A11 Main PCBA DCE074R T
907251 NRL-MB-005_A12 Main PCBA DW074R T2

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Baery pack
Membrane
Switch
Support body
with Laser

Defect Troubleshooting Main Part
Horizontal application
defective
Check x-axis and y-axis bubble
circuit board 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
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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, theunit will auto select X direction. Calibrate the
laser through UP/DWON BUTTON . Press and hold Slope button to save the
3.
calibration value. The rotating laser will flash 3 times.
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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