Welch Allyn LS 135 Service Manual
  1. Manuals
  2. Brands
  3. Welch Allyn Manuals
  4. Lighting Equipment
  5. LS-135
  6. Service manual

Welch Allyn LS 135 Service Manual

Examination light
Hide thumbs Also See for LS 135:

Advertisement

Table of Contents

Service Manual
LS 135/150 Examination Light
Welch Allyn Medical Division
4341 State Street Road
P.O. Box 220
Skaneateles Falls, NY 13153-0220
443194 Rev. B
Copyright 2002

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LS 135 and is the answer not in the manual?

Questions and answers

Related Manuals for Welch Allyn LS 135

Summary of Contents for Welch Allyn LS 135

  • Page 1 Service Manual LS 135/150 Examination Light Welch Allyn Medical Division 4341 State Street Road P.O. Box 220 Skaneateles Falls, NY 13153-0220 443194 Rev. B Copyright 2002...
  • Page 3 Drawings and/or illustrations and/or part numbers contained in this document are for reference purposes only. For current revisions call the Welch Allyn Customer Service phone number listed in Section 1 page 3. Welch Allyn Exam Light i LS 135/LS 150 Service Manual 443194 Rev. B...

  • Page 4: Table Of Contents

    LS 150 Wall Model Dissambly ..................14 LS 150 Floor Model Dissambly.....................17 Appendix A: Repair Parts Lists Appendix B: Exploded View Photo Illustrations Appendix C: Electrical Schematic ii Welch Allyn Exam Light LS 135/LS 150 Service Manual 443194 Rev. B...

  • Page 5: General Information

    About the LS 135 Examination Light The LS 135 examination light is a 35-watt halogen light that produces significantly whiter, brighter light than the ordinary gooseneck units. The dual intensity control switch allows you to instantly adjust light output to meet your exact requirements.
  • Page 6 INTENSE LIGHT: Lamp is extremely bright. Do not stare at the lamp when in use. May be harmful to eyes. CAUTION: Remove power cord from electrical outlet and allow lamp to cool 10 minutes before replacing with Welch Allyn lamp. DANGER: Electric Shock Hazard. Refer servicing to qualified service personnel.

  • Page 7: Help Information

    (011) 86-21-63279632 tel: (011) 33.1.6009.3366 Welch Allyn Japan K.K. Fax: (011) 33.1.6009.6797 Bon Marusan 8F, 3-5-1 Kanda Jinbo-Cho, Chiyoda-Ku Tokyo 101-0051 Japan tel: (011) 813-5212-7391 fax: (011) 813-3261-7372 LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 3...
  • Page 8 BLANK PAGE...

  • Page 9: Service

    4. If an item is missing, first check the carton, then check with your receiving department. If necessary contact Welch Allyn at the Address and phone number shown in Section 1 . 5. Clean and disinfect by following the instructions printed in the Operator Manual.
  • Page 10 BLANK PAGE...

  • Page 11: Troubleshooting Mechanical Checks

    1. Turn Switch off and on several times. Light should not flicker while turned on. If you are testing the LS 135 there should be an obvious change in light output between the low & high settings. Switch should be consistent.
  • Page 12 Lamp does not work: 1. Turn off unit and unplug it. Check for blown or incorrect Lamp. Lamp should be 35W, 12V for the LS 135. Welch Allyn Part# 443069. Lamp should be 50 watt for the LS 150. Welch Allyn Part# 445013.
  • Page 13 Section 4 NOTE: Disassembly of LS-135 Floor model. 1. Loosen the screw that secures the lamp nose assembly. 2. Lift lamp nose assembly. 3. Release the lamp retaining spring. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 1...
  • Page 14 Section 4 Disassembly and Repair LS 135 Floor Model 4. Unplug lamp. 5. Remove lamp head by removing 5 screws. 6. Remove lamp bottom housing. 2 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 15 Reassembly Note: Press the tabs back in with a blunt object. A screwdriver handle is shown below. POLE POLE LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 3...
  • Page 16 Note: Colors of wiring harness on pole-end of gooseneck. Red wire is in ‘key’ side of YELLOW connector. WHITE 10. Use pin removal tool to remove connector block. 4 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 17 11. Use 3/32” hex key to remove screw. 3/32” hex key 12. Pull bottom bushing away from flexible arm. Note the o-rings on lower flex bushing. 13. Remove snap ring from upper flex bushing. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 5...
  • Page 18 14. Remove upper bushing from flexible arm. Note: View of completely disassembled gooseneck assembly and wire harness. 15. To remove pole from base, remove screw and bottom plate. 6 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 19 LS 135 Floor Model Disassembly and Repair Section 4 16. Disconnect ground. 17. Disconnect harness. 18. Remove 5 screws from base. Remove top cover. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 7...
  • Page 20 (domestic LS-135 Pole Model): See APPENDIX C for wiring schematic of your country. Reassembly Note: Carefully align wires in groove to prevent damage to insulation when inserting pole in base. 8 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 21 19. Remove phillips screw . Tilt nose up and remove. Unplug Lamp connector. 20. Lift lamp nose assembly. 21. Release the lamp retaining spring. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 9...
  • Page 22 Section 4 Disassembly and Repair LS 135 Wall Model 22. Unplug lamp. 23. Remove lamp head by removing 5 screws. 24. Remove housing. 10 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 23 Note: For Reassembly of all floor and stand LS-135, Install switch according to this photo. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 11...
  • Page 24 LS 135 Wall Model 26. Remove the hex nut to remove mounting plate. 27. Remove bushing from mounting plate. Note: The removal of bushing from wall mount bracket. 12 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 25 See Appendix C “WIRING DIA- GRAMS” for the correct voltage wiring connections. Each country has differ- ent voltage wiring connection. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 13...
  • Page 26 NOTE: Complete parts package for LS150 table/wall mount. 1. Completely unscrew to remove nose assembly from head. NOTE: Notice wiring connections to power switch, PCB and wiring orientation. 14 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 27 2. Completely unscrew hex nut to remove flexible arm. NOTE: Make sure bushing with marks are reinstalled toward hex nut. NOTE: Bushing with indicator marks are attached toward mounting plate. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 15...
  • Page 28 Section 4 Disassembly and Repair LS 150 Wall Model 3. Remove bushing from mounting plate. NOTE: Notice the wiring routing and wire connections. 16 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 29 LS 150 Floor Model NOTE: Disassembly of LS-150 Floor model. 1. Loosen the screw that secures the lamp nose assembly. 2. Lift lamp nose assembly. 3. Release the lamp retaining spring. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 17...
  • Page 30 Disassembly and Repair LS 150 Floor Model 4. Unplug lamp. 5. Remove lamp head by removing 5 screws. NOTE: Notice wiring connections to power switch, PCB and wiring orientation. 18 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 31 7. Remove both pins from connector using a pin removal tool. NOTE: There are two wires going to connector. Remember that they go in the outer channels of the connector. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 19...
  • Page 32 LS 150 Floor Model NOTE: The gooseneck with wiring and connector removed. 8. Use 3/32” hex key to remove screw. 9. Remove snap ring from upper flex bushing. 20 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 33 LS 150 Floor Model Disassembly and Repair Section 4 10. Remove upper bushing from flexible arm. 11. To remove pole from base, remove screw and bottom plate. 12. Disconnect ground. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 21...
  • Page 34 15. Remove both pins with a pin removal tool. NOTE: The two red wires are to go in the two outer positions of the connector. 22 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 35 NOTE: The wire and connector removed from the pole 16. Remove 5 screws from base then remove top cover. NOTE: Notice transformer and how wiring is routed in the base. LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 23...
  • Page 36 Section 4 Disassembly and Repair NOTE: Notice the fuses and connector and how the wiring is routed. See the repair parts lists for proper fuse according to your country. 24 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 37 LS135 TRANS.ASSY,35W DOM 445027 Plug 3 connector LS 135/150 440128 SCHURTER FUSE BLOCK 440009-1 LS 135/150 Floor Model Power Cord Assy. Domestic 440009-2 LS 135/150 Floor Model Power Cord Assy. Europe 440009-4 LS 135/150 Floor Model Power Cord Assy. UK 440009-6 LS 135/150 Floor Model Power Cord Assy.
  • Page 38 CRUSH RIB SLEEVE 106108-7 O-RING 440136 GooseNeck LS 135/150 482038 O-RING 106119-3 4-40 X .125 SHCS 443079-1 BASE COVER PLATE,PLATED 106100-56 1/4-20 X 1"PAN HEAD PHILLIPS 106106-4 EXTRNL LOCKWASHER 2 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...
  • Page 39 MOLEX CONNECTOR 443101 WIREHARNESS, Goose neck LS 150 Floor 443190 CAUTION LABEL 445017 WIRE HARNESS,SW/RECT.BD.50W 106124-40 #6 X .625 PLASTITE LS 135/150 Base 445030 WIRE HARNESS,BASE/GOOSE NECK LS 150 443184-501 HARDWARE KIT, LS 135/150 WALL MOUNT 445021-501 WIRE HARNESS,GOOSENECK HD,50W 440078-4 STRAIN RELIEF LS 135/150 Service Manual 443194 Rev.
  • Page 40 BLANK PAGE...
  • Page 51 LS 135 Electrical Schematics Appendix C LS 135/150 Service Manual 443194 Rev. B Welch Allyn Exam Light 1...
  • Page 52 LS 150 Appendix C Electrical Schematics 2 Welch Allyn Exam Light LS 135/150 Service Manual 443194 Rev. B...

This manual is also suitable for:

Ls 150

Table of Contents