Welch Allyn LS200 Procedure Light Service Manual
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Welch Allyn LS200 Procedure Light Service Manual

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Copyright 1995
Welch Allyn Co.
4341 State Street Road
P.O. Box 220
Skaneateles Falls, NY 13153-0220
Originator: RJS
ECN# 5-29347 10/94
SERVICE MANUAL
LS200 Procedure Light
MODELS: 44200...Domestic
44202...Europe
44204...U.K.
44206...Australia
44210...Wall Mount
44250...Mobile Stand
SERVICE MANUAL 441147 REV A, 9/94
1

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  • Page 1 SERVICE MANUAL LS200 Procedure Light MODELS: 44200...Domestic 44202...Europe 44204...U.K. 44206...Australia 44210...Wall Mount 44250...Mobile Stand Copyright 1995 Welch Allyn Co. 4341 State Street Road P.O. Box 220 Skaneateles Falls, NY 13153-0220 Originator: RJS SERVICE MANUAL 441147 REV A, 9/94 ECN# 5-29347 10/94...
  • Page 2 TABLE OF CONTENTS FORWARD SAFE SERVICE INDEX: ELECTRICAL FAILURE/CAUSE/CORRECTIVE ACTION 5 - 7 MECHANICAL FAILURE/CAUSE/CORRECTIVE ACTION 8 - 11 INDEX: REMOVAL/REPLACEMENT (R & R) PROCEDURES REMOVAL/REPLACEMENT PROCEDURES 13 - 31 APPENDIX SERVICE PARTS LIST AND DIAGRAM WIRING DIAGRAM/SCHEMATIC TOOLS (COMMON & SPECIAL) PRODUCT UP-DATES PRODUCT DESCRIPTION...
  • Page 3 I M P O R T A N T : Welch Allyn part numbers and ‘M’ (material) numbers appearing in this manual are for the purpose of familiarizing new technicians with Welch Allyn documentation conventions. Order replacement parts, as always, by referencing your latest bill of materials, parts catalog and assembly drawings.
  • Page 4 COMPLY with all safety codes and practices for this type of product. COMPLY with all safety regulations at your work place. PERFORM all recommended Welch Allyn service test procedures to assure the LS200 meets all requirements safely and reliably. EXAMINE AND REPAIR OR REPLACE as required, any and all worn or questionable wiring, components, connections, connectors, warning labels, insulation and other items necessary for the continued safe operation of this product.
  • Page 5 LS200. REPLACE fuses. WARNING: burned out lamps. CHECK lamps...are they correct ALLOW LAMPS TO COOL FOR part# for this Light. REPLACE lamp (Welch Allyn at least 20 MINUTES. PN 06400)..defective (failed open) switch.
  • Page 6 INDEX: FAILURE / CAUSE LS200 ELECTRICAL COMPLAINT / (CONDITION): CAUSE / CORRECTIVE ACTION: __________________________ _____________________________ Light output is very ..Wrong lamp(s) (voltage rating above low, all lamps lit. 12 volts). REPLACE with PN 06400..lamp(s) not properly aligned in holder. INSPECT, ADJUST.
  • Page 7 (light ‘flickers’) as arm is seated fully in holder. TROUBLESHOOT / articulated. RESTORE connections /REPLACE defective parts. (Customer should send LS200 to Welch Allyn for service.) Switch produces arc ..switch is defective or wiring connections are loose / or flash when operated.
  • Page 8 INDEX: FAILURE / CAUSE LS200 MECHANICAL D E F I N I T I O N S To simplify text, numbers are used for the names of the joints on the LS200. See figure 1 on page 9. This page of information is for referencing the joints on the LS200 and giving a general description of required adjustments.
  • Page 10 #3. DO NOT LUBRICATE joints. Only joint #1 requires lubrication with Dow Corning #7 release compound, Welch Allyn M#11175..set screw at #2 is loose or missing. TIGHTEN / REPLACE.
  • Page 11 INDEX: FAILURE / CAUSE LS200 MECHANICAL COMPLAINT / (CONDITION): CAUSE / CORRECTIVE ACTION: __________________________ _____________________________ Light head wobbles..clear plastic cover on front of light head is not put on properly. REFER to lamp replacement instructions to VERIFY that plastic cover tabs are aligned with those on the white plastic light housing.

  • Page 12: Table Of Contents

    INDEX: REMOVAL AND REPLACEMENT (R & R) PROCEDURES CAUTION : DISCONNECT LS200 FROM A.C. POWER SOURCE BEFORE SERVICING TO AVOID ELECTRICAL SHOCK HAZARD Component: Page: Bezel assembly - - - - - - Halogen lamps - - - - - - Fuses - - - - - - IEC connector...

  • Page 13: Bezel Assembly

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. BEZEL ASSEMBLY (R & R) PN 441145-501 CAUTION: ALLOW HOT LAMPS TO COOL FOR 20 MINUTES BEFORE REMOVING BEZEL. 1. UNPLUG LS200 AND REMOVE HANDLE. (ALSO REFER TO OPERATING INSTRUCTIONS PN 441118-1ML.) REMOVE POWER CORD FROM A.C.

  • Page 14: B Halogen Lamps

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. HALOGEN LAMP REMOVAL AND REPLACEMENT (R & R) PN 06400 (OSRAM # 44860sp or 44860nsp, [ 12V/20W/12 degree spread ]) D O N O T T O U C H H O T L A M P ! WARNING: ALLOW LAMP TO COOL OFF FOR AT LEAST 20 MINUTES BEFORE TOUCHING LAMP OR SURROUNDING METAL PARTS.

  • Page 15: C Fuses

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. FUSES (TWO) R & R. DOMESTIC: 1A,250V PN 236706-3907 INTERNATIONAL: 0.5A,250V PN 236706-3114 CAUTION: IF AN LS200 HAS BEEN RETURNED FOR FUSE REPLACEMENT, DO NOT JUST REPLACE FUSES AND PLUG IN TO TEST. INSTEAD: LOCATE AND ELIMINATE THE SHORT CIRCUIT BY TESTING TRANSFORMER OR WIRING.

  • Page 16: Diec Connector

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. IEC CONNECTOR R & R 1. REMOVE BACK HOUSING. DISCONNECT LS200 FROM MAINS. IF MOUNTED ON MOBILE STAND, DETACH TRANSFORMER ASSEMBLY FROM POLE. REMOVE FOUR SCREWS AND REMOVE BACK HOUSING. 2. REMOVE IEC CONNECTOR. DISCONNECT THREE WIRES FROM THE TERMINALS ON THE BACK OF THE IEC CONNECTOR (POWER RECEPTACLE).

  • Page 17: E Power Switch

    ATTACH WIRES AND PRESS SWITCH INTO LAMP HOUSING, MAKING SURE THAT THE LAMP SYMBOL ON THE TOP OF THE SWITCH IS TOWARDS THE WORD “WELCH” OF THE WELCH ALLYN NAME ON THE FRONT OF THE HOUSING. THESE WIRES CONDUCT A.C.

  • Page 18: F Transformer

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. TRANSFORMER ASSEMBLY R & R. NOTE: TO CHECK FOR DEFECTIVE TRANSFORMER, MEASURE:input (120V) 60HZ AND OUTPUT (12.6 VAC,+/-.2 VAC @5 Amps.) SEE DWG# 441048. LOW OUTPUT INDICATES A DEFECTIVE TRANSFORMER. HOWEVER, EVEN A GOOD TRANSFORMER WILL PRODUCE LOW OUTPUT IF INPUT VOLTAGE IS BELOW REQUIREMENTS.

  • Page 19: G Lamp Holder

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. LAMP HOLDER R & R 1. REMOVE BEZEL. (ALSO REFER TO PG.8 OPERATING INSTRUCTIONS PN441118-1ML) PUT POWER SWITCH IN OFF POSITION AND REMOVE POWER CORD CONNECTOR FROM A.C. POWER SOURCE. LAY UNIT DOWN WITH HANDLE UP.

  • Page 20: H Lamp Housing

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. LAMP HOUSING PN 441023-1 R & R. 1. REMOVE BEZEL. UNPLUG LS200 AND REMOVE HANDLE. (ALSO REFER TO OPERATING INSTRUCTIONS PN 441118-1ML.) REMOVE POWER CORD FROM A.C. POWER SOURCE. LAY LS200 DOWN WITH HANDLE FACING UP. UNSCREW THE HANDLE COUNTER-CLOCKWISE.
  • Page 21 REMOVED, PRESS WIRES INTO NOTCHES IN THE CRESCENT OR THE FOAM INSERT WILL NOT FIT PROPERLY. INSTALL FOAM IN YOKE. ATTACH WELCH ALLYN LOGOS IN RECESSES OVER PIVOT BOLTS AND ALIGNED WITH PARTING LINE IN YOKE. H 10. INSTALL SWITCH, LAMPS AND BEZEL.

  • Page 22: I Yoke

    CAUTION: DISCONNECT LS200 FROM POWER BEFORE SERVICING. YOKE R & R 1. REMOVE LAMP HOUSING. REFER TO SECTION H-1, H-4, AND H-5 ON PAGE 20, BUT LEAVE TWO RED WIRES ATTACHED TO THE SWITCH SINCE IT IS NOT BEING REMOVED. 2.
  • Page 23 CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. YOKE R & R, CONTINUED..I 10. SLIDE CONNECTOR BLOCK, YOKE STUD, CONNECTOR PLATE, INTO THE UPPER ARM TUBE. ALIGN THE “KEY” EXTRUSION OF THE INTERIOR OF THE UPPER ARM WITH THE KEY WAY OF THE CONNECTOR BLOCK.
  • Page 24 REMOVED, PRESS WIRES INTO NOTCHES IN THE CRESCENT OR THE FOAM INSERT WILL NOT FIT PROPERLY. INSTALL FOAM IN YOKE. ATTACH WELCH ALLYN LOGOS IN RECESSES OVER PIVOT BOLTS AND ALIGNED WITH PARTING LINE IN YOKE. I 16. INSTALL BEZEL.
  • Page 25 CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. YOKE R & R, CONTINUED..I 18. TEST JOINTS. WITH THE LS200 IN AN UPRIGHT POSITION, CYCLE THE ARM UP AND DOWN THREE TO FIVE TIMES. CHECK FORT AN;Y BINDING OF THE JOINT.

  • Page 26: J Joint #3 (Main Hinge)

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. JOINT #3 R & R. 1. REMOVE LOWER ARM. REMOVE TWO FLAT HEAD PHILLIPS SCREWS NEAREST JOINT #3 (ADJUSTABLE JOINT), AND SLIDE LOWER ARM OFF OF HINGE BRACKET. 2. REMOVE STRAP FROM HINGE BRACKET. UNSCREW NUT FROM STUD.
  • Page 27 CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. JOINT #3 R & R CONTINUED..8. INSTALL LOWER ARM / UNIVERSAL JOINT ASSEMBLY. ATTACH STRAP TO STUD USING TOOL T-12686. INSTALL AND TIGHTEN NUT. C A U T I O N !! MAKE SURE YOUR FINGERS ARE AWAY FROM THE HINGE AREA BEFORE PRESSING THE SHORT ARM ALL THE WAY ONTO THE HINGE BRACKET.

  • Page 28: K Cable

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. CABLE R & R. 1. REMOVE JOINT # 3 (MAIN HINGE WITH KNOB). FOLLOW INSTRUCTIONS IN SECTION J-1 THROUGH J-4 ON PG.25. 2. REMOVE BEZEL. FOLLOW INSTRUCTIONS IN SECTION A-1 AND A-2 ON PG.13. 3.

  • Page 29: Joint #4 (Universal Connector)

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. CABLE R & R. K 10. INSTALL SET SCREW AND ADJUST. PLACE ONE DROP OF LOCTITE 222 M#30375 TO SET SCREW AND THREAD INTO HOLE. PLACE UNIT IN UPRIGHT POSITION AND ROTATE JOINT #2 TO THE ‘STOP’. VERY SLOWLY, LOOSEN SET SCREW UNTIL THE LIGHT HOUSING ROTATES DOWNWARD.

  • Page 30: Mobile Stand

    CAUTION: DISCONNECT LS200 FROM POWER SOURCE BEFORE SERVICING. MOBILE STAND DISASSEMBLY / ASSEMBLY. 1. CASTERS PRY THE CASTERS OUT USING TOOL DESIGNED FOR 486 MOBILE STAND. 2. POLE REMOVAL. UNSCREW THE HEX-HEAD SCREW UNDER THE BASE. 3. BASE LEGS. UNSCREW TWO CAP SCREWS AT EACH END OF THE BASE. **** WALL MOUNT DISASSEMBLY.
  • Page 31 WALL MOUNT BRACKET ASSEMBLY CONTINUED..7. ATTACH THE ARM TO WALL PLATE. INSERT FOUR SCREWS INTO BRACKET THROUGH REAR OF WALL PLATE AND TIGHTEN TO 25 IN-LBS. MINIMUM. T E C H N I C I A N N O T E S : ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________...
  • Page 32 APPENDIX AA EXPLODED VIEW OF LS200 WITH PARTS LEGEND...
  • Page 39 APPENDIX BB WIRING DIAGRAM/SCHEMATIC LS200 schematic dwg#441048 wiring diagram dwg#441114...
  • Page 42 Volt-Ohm Meter (with input impedance above 1 megohm) EX.BECKMAN 330 Alligator test leads kit Open end wrench,15/60 degree 15/16" Heat shrink gun. 3/8" Nut driver SPECIAL WELCH ALLYN TOOLS: ITEM: Spring tensioning tool T-12686 Chatillion gage T-7047-2 Holding fixture for arm and...
  • Page 43 APPENDIX DD PRODUCT UP-DATES FILE ALL UP-DATES IN THIS SECTION. MAKE THE APPROPRIATE CHANGES IN THE MANUAL PERTAINING TO THESE UP-DATES.
  • Page 44 Please refer to the Owner’s Manual PN 441118-1ML “Set-Up and operation” to become familiar with the LS200. This product is designed and manufactured to strict specifications and safety regulations for medical products, and should be serviced by Welch Allyn trained technicians only.

This manual is also suitable for:

442004420244204442064421044250

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