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

ECN# 5-29347 10/94

SERVICE MANUAL 441147 REV A, 9/94

TABLE OF CONTENTS

FORWARD 3
SAFE SERVICE 4
INDEX: ELECTRICAL FAILURE/CAUSE/CORRECTIVE ACTION 5 - 7
MECHANICAL FAILURE/CAUSE/CORRECTIVE ACTION 8 - 11
INDEX: REMOVAL/REPLACEMENT (R & R) PROCEDURES 12
REMOVAL/REPLACEMENT PROCEDURES 13 - 31

APPENDIX

SERVICE PARTS LIST AND DIAGRAM | AA
WIRING DIAGRAM/SCHEMATIC | BB
TOOLS (COMMON & SPECIAL) | CC
PRODUCT UP-DATES | DD
PRODUCT DESCRIPTION | EE

FORWARD

This SERVICE MANUAL provides technical assistance to Welch Allyn repair technicians for diagnosing, repairing, and testing the WELCH ALLYN LS200 PROCEDURE LIGHT. The manual's main content areas cover: troubleshooting, step by step repair, adjustment, and re-test procedures. The repair 'TASK' procedures (R & R .. Removal and Replacement) are written to provide quick and easy reference for repair technicians of different experience levels. Required specifications and materials are listed at each step where applicable. When reading this manual for the first time, have an LS200 readily available for reference and practice. Read each complete repair step on what to do (task statement), plus how to do it (technique statement) before starting the repair or practice.

Training for the LS200 should consist of detailed demonstrations of required repair tasks, practice on LS200's using repair tooling and materials. Assess skill development through observation of trainee practice on actual equipment. Set up sessions to allow the trainee to practice the use of the diagnostic, repair, adjustment, and re-testing procedures found in this manual. The ability of the technician to develop and retain new skills is in great part dependent on well prepared training exercises. Each trainee must have the opportunity to practice the procedure(s) after it has been demonstrated by the instructor.

More detailed background product information is found in the APPENDIX section and as such will be a critical element in a comprehensive service training program for technicians.

IMPORTANT:

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. Part number changes, product updates, or new test procedures should be noted on the appropriate page of this manual by the manual owner. Notices announcing these changes should be attached to PRODUCT UPDATES APPENDIX.

WEAR EYE PROTECTION WHEN SERVICING THIS PRODUCT!

SAFE SERVICE

DISCONNECT power cord from A.C. power source before initial disassembly of LS200 Light. OBSERVE cautions / warnings in owners manual and printed on the product itself.

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.

DO NOT TOUCH halogen lamps or nearby parts during or immediately after operation. WAIT AT LEAST TWENTY MINUTES (20 MIN.) BEFORE TOUCHING HALOGEN LAMPS OR METAL NEAR THE LAMP(S). VERY HIGH TEMPERATURES will cause severe burns! Fractured or broken lamps may cause injury. To prevent cuts, REMOVE such lamps by HOLDING them with a cloth or wear work gloves. WEAR SAFETY GLASSES!

DO NOT LOOK DIRECTLY AT, TOUCH OR SPRAY LIT halogen lamps

QUALITY SERVICE

MODIFY your SERVICE Manual by notating changes and revisions of part numbers and procedures. Enter this information on the appropriate page...and include a copy of the notification in your Appendix "Product Updates".

READ AND UNDERSTAND customer comments and complaints on accompanying documentation (P.O. or other correspondence). IF AN INJURY OR ILLNESS TO PATIENT OR USER, OR HAZARDOUS MALFUNCTION HAS OCCURRED OR IS SUSPECTED, DO NOT DISASSEMBLE, REASSEMBLE, ALTER OR REPAIR THE PRODUCT IN ANY WAY...INSTEAD, GIVE THE UNIT AND ALL ACCOMPANYING PAPERWORK TO YOUR REPAIR SUPERVISOR. Appropriate action per approved Welch Allyn policy will be taken.

When performing a complete inspection, LOOK for: missing parts, product defects, damage, tampering, unsafe condition of wiring or any component. ENTER all findings and test data along with repair status in the appropriate file.

Most of the repairs can be performed on a foam covered work bench. Place the LS200 in holding fixture for repairs. Take all actions to prevent scratching the bezel.

INDEX: FAILURE / CAUSE LS200 ELECTRICAL

INDEX: FAILURE / CAUSE LS200 ELECTRICAL

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.

... bezel not installed properly. CHECK AND ALIGN three clear round sections of bezel directly over the lamps.

... dirty glass filters on bezel assembly. CLEAN.

... defective transformer. MEASURE secondary voltage. (at transformer: input:120V 60Hz/ output:12.6 VAC, +/-.2 VAC @ 5 Amps OR at lamp holder: 12.0 +/-.3 VAC) See drawing #441048. Low output indicates defective transformer. However, even a good transformer will have low output when provided with low input voltage. MEASURE both voltages. Light intensity is proportional to current passing through lamp filament.

... glass is