Measuring Tools & Sensors - Recent Questions, Troubleshooting & Support
Need user manual for w5746
Same exact features, buttons and functions as this manual by Irwin.
http://www.irwin.com/uploads/documents/36_laser_tape_25.pdf
I have a dewalt dw077 self leveling laser. It will not turn on! Battery is good!
Well, I opened a DW077 today as it didn't wanted to turn on. It was brought to me by a neighbor and he hadn't a clue what made it stop working. I removed the outside screws and rubber feet using a Torx T10 with a hole in the middle. Be careful not to remove the screws arranged in a square pattern as these hold the steppers in place. You don't want to mess with calibration ! Also be gentle with the rubber around the rotating head. You need to remove the metal ring on the outside to detach the rubber grommet.. Once open, there is not much to be found inside. There is one pcb, two steppers and some other plastic stuff. Measuring over the big cap indicated 0.9v and over the small cap I had a unstable low voltage. After desoldering some wires, the underside of the PCB can be inspected (all components are on the underside). What I found there was that the main capacitor (1000µF 50v 105°C) of the 5v voltage regulator circuit was blown and leaking electrolyte. Not only was the capacitor gone, it also took an SI4532A mosfet array with it. The 3A fast chip fuse was still intact. The circuit pulled +- 10mA at rest and it went up to 20ma when depressing the power button. That SI4532A chip consists of a P and N mosfet in an SOIC 8pin package. The N side had a hole and the pins were blackened. My guess is that this controls the power on-power off signal that goes to the LM2596-5 buck regulator. I have made some pictures of the damage. So this is a route to research. Hope it helps someone
Will one of the newer sensors work in place of my 1457 sensor?
It's possible that one of the newer sensors could work in place of your 1457 sensor, but it depends on the specifications of the newer sensors and the compatibility with your base unit. The I MAX1457 sensor, which is a highly integrated analog-sensor signal processor optimized for piezoresistive sensor calibration and compensation. However, I have no information about its compatibility. If you're looking for a replacement sensor, I suggest contacting the manufacturer of your base unit to inquire about compatible sensors. Alternatively, you can check the user manual of your base unit to see if it lists compatible sensors. Garage door opener sensors are not universal. Safety sensors can only communicate with garage door openers from the same brand.
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