Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





One laser store meets all your needs

Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Tutorials, Help & Repairs





Reply
 
LinkBack Thread Tools Display Modes
Old 07-05-2017, 07:03 PM #1
Junior Member
 
Join Date: Mar 2012
Posts: 4
Rep Power: 0
TinyRobotArmy is on a distinguished road
TinyRobotArmy TinyRobotArmy is offline
Junior Member
 
Join Date: Mar 2012
Posts: 4
Rep Power: 0
TinyRobotArmy is on a distinguished road
Default Repair Help: 445nm 1.2w 3-mode micro from wannaburn/JLSE

This is the actual laser I am attempting to repair:
Sold / 3-mode 1.2w s/s micro
I purchased it from 'wannaburn' back in 2012 and it really is/was a fantastic laser.

The Problem: At some point the diode/heat sink assembly became rotationally lose within the host. This allowed the wiring from the diode to the boost board(s) to twist and sever when turning the lens focus ring.

My initial disassembly of the laser for diagnosis (after repeated failed attempts to contact the seller for repair service) was at least a couple of years ago. What started out as a likely simple resoldering procedure has, over the years, become a convoluted crash course in guesswork/reverse engineering and some learned knowledge about laser components and improved soldering skills.

Where I'm at today: twice now I've rebuilt this thing with the same results, i.e., the diode powers on (li-ion cell) and can be cycled through 3 modes, however the output power is minimal at best and the 3rd mode (low/pulsed) flashes on/off like that of a reset digital clock.

I (mostly) assume that the 'mode' chip is working while the boost chip is not. I'd like to determine if I am (hopefully) just missing something in my work or if I've managed to bugger a component on the boost chip. Any helpful advice/consideration is appreciated.


TinyRobotArmy is offline   Reply With Quote


















Old 07-05-2017, 07:12 PM #2
diachi's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 8,434
Rep Power: 78159
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
diachi's Avatar
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 8,434
Rep Power: 78159
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: Repair Help: 445nm 1.2w 3-mode micro from wannaburn/JLSE

Quote:
Originally Posted by TinyRobotArmy View Post
This is the actual laser I am attempting to repair:
Sold / 3-mode 1.2w s/s micro
I purchased it from 'wannaburn' back in 2012 and it really is/was a fantastic laser.

The Problem: At some point the diode/heat sink assembly became rotationally lose within the host. This allowed the wiring from the diode to the boost board(s) to twist and sever when turning the lens focus ring.

My initial disassembly of the laser for diagnosis (after repeated failed attempts to contact the seller for repair service) was at least a couple of years ago. What started out as a likely simple resoldering procedure has, over the years, become a convoluted crash course in guesswork/reverse engineering and some learned knowledge about laser components and improved soldering skills.

Where I'm at today: twice now I've rebuilt this thing with the same results, i.e., the diode powers on (li-ion cell) and can be cycled through 3 modes, however the output power is minimal at best and the 3rd mode (low/pulsed) flashes on/off like that of a reset digital clock.

I (mostly) assume that the 'mode' chip is working while the boost chip is not. I'd like to determine if I am (hopefully) just missing something in my work or if I've managed to bugger a component on the boost chip. Any helpful advice/consideration is appreciated.

How much output power is "minimal at best"?

Have you measured current consumption when set to full power mode? If so, what is it?

Diode could well be an LED, that'd explain the low output power. Test the current draw from the batteries and let us know, that'd narrow it down to the LD well.
__________________


405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
473nm | B&W Tek BWB-10-OEM |
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2


B&W Tek Spectrometer
LaserBee 2.5W USB LPM


Check out my Reddit Subreddit! >>/r/laserpointers<<


Last edited by diachi; 07-05-2017 at 07:13 PM.
diachi is online now   Reply With Quote
Old 07-05-2017, 08:42 PM #3
Junior Member
 
Join Date: Mar 2012
Posts: 4
Rep Power: 0
TinyRobotArmy is on a distinguished road
TinyRobotArmy TinyRobotArmy is offline
Junior Member
 
Join Date: Mar 2012
Posts: 4
Rep Power: 0
TinyRobotArmy is on a distinguished road
Default Re: Repair Help: 445nm 1.2w 3-mode micro from wannaburn/JLSE

DCA = 1-1.2mA. 10% of what it should be.
TinyRobotArmy is offline   Reply With Quote
Old 07-05-2017, 08:51 PM #4
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 6,232
Rep Power: 96754
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 6,232
Rep Power: 96754
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: Repair Help: 445nm 1.2w 3-mode micro from wannaburn/JLSE

The current on a 1.2 watt laser needs to be more than 10 times 1 mA to 1.2 mA. If it is using a boost driver and you are sure the batteries are not discharged or defective, the driver is most likely bad. That doesn't mean the the laser diode is good, however. Are you certain of your current measurements? Are you sure it isn't 1.2 amps?
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 1.75 watts SkyRay Gifted
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
635nm 100mW pointer
635nm Lifetime17 Mini-camo build 687mW
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
LaserBee II 3.2 Watt LPM
Radiant X4 3.7 Watt LPM

Last edited by paul1598419; 07-05-2017 at 08:52 PM.
paul1598419 is online now   Reply With Quote
Old 07-05-2017, 10:14 PM #5
Junior Member
 
Join Date: Mar 2012
Posts: 4
Rep Power: 0
TinyRobotArmy is on a distinguished road
TinyRobotArmy TinyRobotArmy is offline
Junior Member
 
Join Date: Mar 2012
Posts: 4
Rep Power: 0
TinyRobotArmy is on a distinguished road
Default Re: Repair Help: 445nm 1.2w 3-mode micro from wannaburn/JLSE

My 10% math was a bit "half-baked" at the time However, the readings are accurate. The Li-ion cell is at 4.11VDC
TinyRobotArmy is offline   Reply With Quote
Old 07-05-2017, 11:01 PM #6
paul1598419's Avatar
Class 4 Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 6,232
Rep Power: 96754
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 4 Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 6,232
Rep Power: 96754
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: Repair Help: 445nm 1.2w 3-mode micro from wannaburn/JLSE

Well, if the driver has 4.11 VDC to the input and you are getting ~1 mA to the laser diode, the driver is bad. How are you measuring the current? Are you measuring it at the battery? If so, it's still a bad driver. You mentioned that it has flashlight modes in the OP. Is there a separate driver for the laser diode? I'm trying to figure out which driver is bad.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
Thor H Dual Power 445nm, 438 mW & 1648 mW
445nm 1.75 watts SkyRay Gifted
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
477nm 127 mW 501B
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
520nm LaserLands pointer Measures 510nm
532nm LSR532H-1W Laser, LSR-PS-N1 Driver, RS-75-5 P.S. 1300 mW
532nm 200mW Thermostatically Controlled Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PS
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
635nm 100mW pointer
635nm Lifetime17 Mini-camo build 687mW
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
LaserBee II 3.2 Watt LPM
Radiant X4 3.7 Watt LPM
paul1598419 is online now   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f51/repair-help-445nm-1-2w-3-mode-micro-wannaburn-jlse-100876.html
Posted By For Type Date
Laser Pointer Forums - Discuss Laser Pointers This thread Refback 08-30-2017 01:28 PM










Loading
















Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 08:15 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC