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Service Manual

LS 135/150 Examination Light

443194 Rev. B

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.

Contents

Section 1: General Information
About the LS 135.....1
About the LS 150.....1
Approvals .....1
Safety Warnings.....2
Help Information.....3

Section 2: Service
Incoming Inspection/Checklist .....1
Required Tools .....1

Section 3: Troubleshooting
Mechanical checks .....1
Electrical checks.....2

Section 4: Repair and Disassembly
LS 135 Floor Model Dissambly .....1
LS 135 Wall Model Dissambly.....9
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

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. A molded lexan light head does not conduct heat, keeping the luminaire cool to the touch. Multiple installation options include floor stand, table mount, wall mount and caster base.

About the LS 150 Examination Light

The LS 150 features a color corrected 50 watt lamp that delivers superior light quality across the variable spectrum for more accurate color rendition. The special designed light head keeps the luminaire cool to the touch even during multiple exams. The lamp has been offset at a 12 degree angle relative to the luminaire housing, allowing an unobstructed view of the field of interest.

Approvals

C LISTED 74227

ETL listed

UL2601-1,

CSA C22.2 No. 601.1

IEC 60601-1, AS 3200.1

IEC 60601-1-2

CE

The CE mark on this product indicates that it has been tested to and conforms with the provisions noted within the 89/336/ECC Electromagnetic Compatibility Directive.

C

Australia EMC Framework Compliance

N344

Section 1

Cautions and Warnings

INTENSE LIGHT: Lamp is extremely bright. Do not stare at the lamp when in use. May be harmful to eyes.

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CAUTION: Remove power cord from electrical outlet and allow lamp to cool 10 minutes before replacing with Welch Allyn lamp.

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DANGER: Electric Shock Hazard. Refer servicing to qualified service personnel.

DANGER: Risk of explosion if used in the presence of flammable anesthetics.