WelchAllyn 49540, 49520, 49522, 49524, 49526 User manual
Welch Allyn Multi Fiber
Illumination Headlight
System
Service Manual
Models: 49540,49520,49522,49524, 49526
Copyright 1997
Welch Allyn Inc.
4341 State Street Road
Skaneateles Falls, NY 13153-0220
Part Number 495623 Rev A.
Revision (History) Page
Rev. Description of Change ECN # Date Initial
A New Release 5-34457 1/14/97 JSJ/MD
Service Manual Welch Allyn Fiber Optic Hea dlight System
Introduction Page 2
To Service Personnel:
The information in this manual is subject to change without notice and should
not be construed as a commitment by Welch Allyn, Inc.
Welch Allyn assumes no responsibility for any errors that may appear in this
manual. If the product and/or its operation varies significantly from any
description herein, please contact the Welch Allyn Product Service Department
at 4341 State Street Road, Skaneateles Falls, New York 13153-0220, 1 800 6699771, (315) 685-4445
This product has been designed to provide a high degree of safety and
reliability. However, we can not guarantee against the deterioration of
components due to aging and normal wear.
All service and repairs must be performed by authorized Welch Allyn personnel
or agents, using Welch Allyn replacement parts. Failure to do so will invalidate
the product warranty.
Authorized service centers should refer to repair specification for proper test
and device history record requirements.
Please refer to the product warranty for specific coverage.
Welch Allyn, Inc.
Medical Products
4341 State Street Road
Skaneateles Falls, New York 13153-0220
USA
1 800 669-9771
(315) 685-4445
Service Manual Welch Allyn Fiber Optic Hea dlight System
Introduction Page 3
Service Manual
Welch Allyn Fiber Optic Headlight System
Table of Contents
Part Number Model name Section Page
49540 Luminaire
Disassembly / Repair 1 6-11
49540 Suspension Repair/Adjustment 1 11
495591-502 Headband Assembly 2 12
49543 Fiber optic cable 2 12
all Required tools 3 13
all Problem Solving 4 14
all Recommended spare parts Appendix A 15-16
all Drawings and Figures Appendix A
If you have technical questions, or need other assistance, call Welch Allyn
customer service personnel at
1-800-669-9771.
Cleaning Warnings:
DO NOT IMMERSE the Luminaire in any type of liquid. Do
not spray it heavily with any type of liquid. The liquid might enter the Luminaire
and create a service problem. DO NOT AUTOCLAVE the whole Luminaire. Only
the Joystick is autoclavable separately.
Follow Cleaning and Maintenance instructions in Owner's Manual PN495608.
Caution
light source. Clean exterior surfaces of Luminaire, headband, and fiber optic bundle by
wiping clean with any of these solutions: Banicide, Cidex, Cidex Plus, Cidex 7,
Metracide, 10% Wescodyne, 10% chlorine bleach, 70% Isopropyl alcohol, Wavecide01, mild soap and water solution.
: Turn off light source before disconnecting fiber optic bundle from headlight or
Service Manual Welch Allyn Fiber Optic Hea dlight System
Introduction Page 4
Table of Reference Drawings (Appendix A)
Drawing # Description
495540 Welch Allyn Headlight Main Assembly . . .
495570
495550
Note that drawings within this manual are for reference only. Consult factory for
current revisions.
Suspension / Luminaire Assembly ......
Luminaire Assembly.................
Service Manual Welch Allyn Fiber Optic Hea dlight System
Introduction Page 5
Section 1 Disassembly & Reassembly
Abstract of disassembly and reassembly of 49540 Luminaire:
The whole luminaire can be disassembled with the exception of the Mirror and
back plate which are pinned and glued to the bottom housing. If moisture is
present in the luminaire, replace the iris assembly and clean the lenses by
following instructions in this manual. With the exception of the mirror, all
components can be replaced as necessary.
The following is the process for completely disassembling and reassembling the
luminaire for 'O' ring replacement. "O" rings are used not to seal out moisture
but to provide a smooth moveable connection between parts. Only replace 'O'
rings if they are worn, cracked, stretched out or missing. If the iris control sleeve
is too loose, then the O rings have failed.
1.1 Removing O rings:
__
Unscrew
joystick from the lower housing.
__Unscrew
or equivalent. The bezel is glued on.
__
Unscrew
__
__
the top cap off of lens housing.
Pull
Remove
1.2 Remove Bottom Housing:
__
Unscrew
held together using a thread locking adhesive. Use of a collet
will be needed to break the bind of the thread locker.
Note: the back plate and the mirror can not be replaced as they are pinned and
glued into the bottom housing. If the mirror is broken or loose, replace the
complete bottom housing assembly.
1.3 Remove Iris Assembly:
__
Unscrew
Use 1/16" flat blade screwdriver.
the bezel from the luminaire. Use the appropriate collet
the top nut. Use collet or equivalent.
O rings.
bottom housing from lens housing. These parts are
the small pin in the side of the control sleeve.
Note: If the iris pin is sheared, it might be removed by grabbing it
with a small diagonal cutters and unscrewing it. If not, replace lens
housing Asy.
__
__
__
control sleeve from the lens housing.
Pull
Remove
Unscrew
'O' rings.
the iris retaining nut using the Welch Allyn tool
T-14452 or equivalent.
Service Manual Welch Allyn Fibe r Optic Headlight System Page 6
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