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On my Topcon rl-sv2s the instrument will spin but there is no red beam how can I fix this

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Posted on Jan 02, 2017

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SOURCE: topcon rl-hb wont level

One guy says disassemble and clean the mirror on the turret

Posted on May 18, 2013

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1 Answer

What is the slope buttons used for


If you have the standard RL-H3C then there are 3 buttons. Starting from the left there is the "height alert" then "manual" then "Power".

Height alert is a function that after the laser levels and spins monitors the position of the laser. If the laser moves more then a tiny amount then the height alert function is tripped, and the laser flashes it's lights and stops spinning (or spins slowly) to let you know the base line position of the laser has changed. Pressing the height alert button twice shuts this mode off.
Manual mode means after the laser is leveled, it completely ignores the level vials. You can turn the laser any way you want to and it will always spin and not cause any errors.
Power is self explanatory.
If it's a RL-H3CS then it has two arrow buttons, that when in manual mode, allot one axis of the laser to be manually adjusted up and down to do a manual slope.

Sep 22, 2014 | Topcon Rlh3c Rotating Laser Level W...

1 Answer

What is topcon pipe laser tp-l4 error code 03


ERROR 03 is a grade circle reading error. The grade system uses an etched glass circle, the same as a digital Theodolite or total station uses, to measure it's grade. If there is a problem with the readings of the circle then values have been lost telling the circuits how to read that exact circle properly, or something has become damaged. I've seen a number of them where the circle was intact, however no longer attached to the axis shaft it is supposed to be permanently fixed to.
The user manual says to turn the unit off and back on, to see if it was just a momentary glitch. I would also remove the battery and external power for a few minutes before I turned it back on. Unfortunately, if that doesn't solve the problem the signals are going to have to be realigned, and parts may have to be replaced. In order to realign the signals, a standalone power supply is needed, as well as a digital oscilloscope and Topcon tolling, called "illuminators".

Aug 28, 2014 | Topcon Tp-l4a Red Beam Pipe Sewer Laser W...

2 Answers

How do I calibrate a topcon laser ?


There are detailed instructions in your users manual on how to check and adjust your Topcon laser. You'll need a tripod, 2 vertical surfaces about 50 meters apart and your laser receiver. It's done by marking positions of the beams, on the different surfaces and then adjusting your laser position to the center of the different positions.
The procedure is different for different models, but i have attached some pictures from the manual for the RL-VH4 series. calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-0.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-2.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-5.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-9.jpg calibrate-topcon-laser-xppjbjvrkh5xtizgw5mfou0l-3-14.jpg

Aug 11, 2014 | Topcon Rotating Builders Red beam Laser...

1 Answer

No laser beam on topcon rlh3c laser level


Take this to a survey/laser repair shop, preferably one that does not charge for estimates.. The laser diodes on the RL-H3C is not serviceable. It requires the lens barrel assembly (or telescope tube unit, i don't remember what they call it in these). It's unreasonably expensive, and will likely be a write off. It may however be the main circuit board, but likely not. Be prepared to replace this unit.

Feb 25, 2014 | Topcon Rlh3c Rotating Laser Level W...

2 Answers

Weak beam .can barely see espically when sun is shining.


How old are the batteries? The company appears to be proprietary and does not release much information.

Sep 02, 2013 | Topcon tpl4b pipe laser w/remote,red

3 Answers

Topcon rl-hb wont level


I have one of this model too and have the same problem. It spin and spin but won't level. After a couple of minutes it stops and the power led fast blink.

Sep 23, 2012 | Topcon Rl-hb Rotating Laser Level W/ls-70b

1 Answer

Topcon rl-60b


Hopefully it's the simple answer. The bubble vial may be out. start where the level vial says is level, and move outwards in slow circles to try and find a place the laser thinks is level. if you find a spot, use the 3 adjustment screws on the bottom of the bubble vial to make that your new center.
Otherwise, it's a not good news. A couple things could be gone wrong. The oil bath compensator could have leaked. If you open the laser, and it's oily inside, throw it away.
It could be the peep site could need adjusting, or the laser diode could be blown. If the laser diode is dead, same solution as the compensator leaking. There are no parts available for these anymore, chuck it out.
The peep site isn't a write off, per se. The laser operates by shooting the beam through a oil bath, which compensates for the instrument not being perfectly level, and then through a splitting lens. part of the beam travels up, and through the rotating head. And the rest goes through a peep site, to a light reflecting area of the main circuit board. if the board or peep site is no longer aligned, the laser will never think it's level. The bad news about that, it is a very tricky and time consuming repair, that few technicians know how to do, or if they do know how are most aren't comfortable doing it.
You can try taking the cover off, leveling the instrument, powering it up and trying to move the circuit board until the laser thinks it's level, but i wouldn't waste much time on it.

Aug 27, 2012 | Topcon Rl-60b Rotating Laser Level C/w...

2 Answers

I have a topcon RL50 rotating lazer when bubble level is set the out of level light flashes and the lazer will not work Bob


aken from Pauldos Personal Laser Blog,
http://www.pauldos.com/lasers/article.php?article=1193142611
The Topcon RL-50B and RL-60B leveling lasers use a fairly unique compensator arrangement. Most leveling lasers use a suspended compensator arrangement, with a lens or mirror on the pendulum. The pendulum is usually metallic, and inside another metallic barrel, so that an electrical connection between the pendulum and outer barrel indicates to the electronics that the compensator is 'out of range'. The RL-50B/60B has a fluid compensator system where the laser beam is reflected off an interface between the fluid and a window, with the level of the fluid influencing the reflection angle of the laser beam. Because there is no electrical aspect to the compensator, an optical system is used to detect when the compensator is 'out of range'. In the output structure of the laser, a glass window at forty-five degrees is used to reflect a small portion of the beam to a photo detector. When the laser is level, the small portion of laser beam strikes the photo detector.

A common fault with these lasers is to constantly indicate 'out of level'. This occurs when there is insufficient beam intensity on the photo detector. The standard solution for this fault is to clean the 45 degree window. Sometimes, this does not bring the laser back to life. I have stripped down a couple of these lasers to try and figure out what is going on.
At first, I thought that maybe the laser diode could be down on power, reducing the available beam, but I quickly discounted that, because the laser diode output is feedback controlled, so the output power is stable up until the point of complete failure. One of the units I disassembled had cracks in the compensator housing, and the fluid level was low. I don't know whether the fluid leaked or evaporated, but in either case, there was no way the compensator could be repaired. In another unit, I noticed that the fluid was discoloured. Since I don't know what the composition of the fluid is, I don't know what could cause it to discolor. Perhaps extremes of heat or cold may damage the fluid. If the fluid is discolored, that may reduce the available laser power at the output. The question is, can we compensate for this? (pun not intended)

I decided to reverse-engineer the photo diode circuit, and see if there was any way to improve it. There is. The photo detector amplifier is a standard op-amp inverting amplifier. The feedback resistor, surface mount R23, is 470K. I changed this resistor to 680K to increase the gain of the amplifier, and bingo! the laser works like a real one again. Extensive testing in the workshop and in the field shows that the laser functions as originally designed in all ways. I have done this modification to over fifty of these lasers now, and the modification extends the life of the laser anywhere from a few months to a few years, with the average about one and a half to two years. Customers are always happy to not have to buy a new laser for another year or so, so this modification is always embraced when offered. I have never figured out what is going on with the fluid, but since I have a solution (again, pun not intended), I don't care.

cleaning instructions :
Remove the housing. Remove the battery holder. Loosen two small silver grub screws on the turret. Lift turret off. Clean slant window with acetone and a cotton bud. Avoid smearing the glue in the corners over the window. Flatten and curve a cotton bud to clean the inside of the slant window. Clean the folding mirror under the slant window. Replace the turret. Turret has a small amount of play, so align it for best operation before tightening grub screws. Re-fit battery holder and housing. All done!

Jan 06, 2011 | Topcon Rlh3c Rotating Laser Level W...

1 Answer

My Topcon RL-H3A continually attempts to levvel its self then runs for a short while then goes into a like stand by mode with the out of balance off light (red) and Power light (Green) flashing Thisn...


Sound like the laser diode is failing. It's power is likely just strong enough to get the level position right, then dims as it runs. The unit, no longer seeing the laser, decides it's out of level and stops. Or the oil in the compensator is leaking, and the same process is happening. Unfortunately the replacement part is not economical to replace.

Dec 02, 2010 | Topcon Rlh3a Long Range Rotating Laser...

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