WelchAllyn 49600, 49602, 49604, 49606, 47100 User manual
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Welch Allyn Single Fiber
Headlights
Operation Manual
Illumination Headlight
System
Service Manual
Copyright 1997
Welch Allyn Inc.
4341 State Street Road
P.O Box 220
Skaneateles Falls, NY 13153-0220
P/N 496144 Rev A.
Models: 49600,49602,49604,49606,
47100,47102,47104,47106
Revision (History) Page
Rev. Description of Change ECN # Date Initial
A New Release 5-34455 1/14/97 JJ/MD
SFI Light Source/Luminaire Service Manual Page 2
Introduction
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 Ally n 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 pe rf o r med b y authorized Welc h Ally n p er sonnel
or agents, u si n g Welc h Allyn replacement p a rts. Failure to d o 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
SFI Light Source/Luminaire Service Manual Page 3
Introduction
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Table of Contents
SECTION 1: General Information
Basic System Description .............6
Specifications ......................7
SECTION 2: Service
Intent of Manual ....................8
Required Tools .....................8
Words of Caution ...................9
Performance Check .................9
Calibration .......................10
SECTION 3: Problem Solving
Troubleshootin
SECTION 4: Disassembly and Repair
SECTION 5: Maintenance
Preventative Maintenance ............22
Cleanin
Checkin
Measurin
Fuse or Lamp Replacement ..........25
SECTION 6: Theory of Operations
Introduction .......................26
Start Up Routine ...................26
Power Supply .....................27
Ballast Board......................27
...................11
.........................23
Ground Impedance ........23
Leakage Current ..........23
SFI Light Source/Luminaire Service Manual Page 4
Introduction
Table of Drawings (Appendix A)
N/A ........................................ Parts List/Recommended Inventory
A03569 (Reference Only) .......................Electrical Safety Test Specification
496141 (Reference Only) .................................... SFI Exploded View
496045 (Reference Only) ..................................Interconnect Diagram
Note that the drawings contained within this manual are for reference only. Consult
factory for specific drawing and revision level.
SFI Light Source/Luminaire Service Manual Page 5
General Information
Introduction
Basic System Description
Model # 49601 is a medical light source which is used in conjunction with the Welch Allyn SFI
Headlight Luminaire model 49610. The headlight is a lightweight fiber optic system that
provides a bright white light through the use of Arc Lamp technology.
49600....Welch Allyn Light Source
100-240 VAC
50/60 Hz
U.S.A. Plug Type
49602...Welch Allyn Light Source
100-240 VAC
50/60 Hz
European Plug Type
49604...Welch Allyn Light Source
100-240 VAC
50/60 Hz
U.K. Plug Type
49606...Welch Allyn Light Source
100-240 VAC
50/60 Hz
Australian Plug Type
SFI Light Source/Luminaire Service Manual Page 6
Section 1 General Information
Specifications
Power Supply
100-240 VAC, 50-60 Hz, Universal input
Power Consumption 40 Watts Max.
Leakage Current: Less than 100 microamps
Light Source Dimensions
WxLxH = 4.5in (11.43cm) x 6.5in (16.5cm) x 2.5in (6.35cm)
Light Source Weight
Under 5 pounds (2.25 Kilograms)
Illumination System
Proprietary Arc Lamp
Color temperature: 5500K
Lamp: 60 Volts, 24 Watts
Lamp Life: 200 hours minimum when employed in a 45 minutes on / 15 minutes off
duty cycle. Average lamp life decreases when shorter duty times are employed.
Dimming System
Manual Shutter: 20% to 100% full output
Fiber Optic Cable Interface
Welch Allyn proprietary connector
Approvals
UL 2601-1 IEC 801-2,3,4,5
CSA C22.2 no. 601.1-M90 EN 55011
IEC 601-1 IEC 601-1-2
Australia AS3200
Light Spot Diameter at 16in (40cm) Distance
Minimum: .75in (20mm)
Maximum: 3.0in (75mm)
Environment
Operating: 60F to 85F
Storage: -13F to 140F
Equipment Classification
Light Source: Type B
Luminaire: Type BF
Fuses
T1.0A L250V (1.0Amp., 250V, time lag (Slow-Blow), Low breaking capacity)
SFI Light Source/Luminaire Service Manual Page 7
Service
Intent of Manual
The purpose of this manual is to provide Welch Allyn Inc. authorized servi ce representativ es wi th
systematic guidelines for preventative maintenance, problem identification, and service of the
Welch Allyn Single Fiber Headlight System. We have included the theory of operation schematic
diagrams, simplified drawings, service tips and procedures to assist a trained service
represen tative with board-level repairs. Should you encounter problems that are beyond the
scope of this manual, please contact the Technical Service Depar tment of Welch Allyn's Medical
Products for assistance.
Required Tools for Service
1. 3/8" Nut Driver
2. Screwdriver(s): Phillips #1, Phillips #2
3. Screwdriver: Flat Blade #4
4. Long Nose Pliers
5. Wire Cutters Xcelite 54CG
Required Equipment:
1. Digital Volt/Ohm Meter with Leads (True RMS). Beckman model 310 or equivalent.
2. Soldering Iron
3. Solder Sucker or Desoldering Wick
4. Kepco Model MSK 10-10M Power Supply. Capable of 10 amps at 10VDC.
5. Hy-Pot Tester- Associated Research Inc. Model 35400D or Equivalent.
SFI Light Source/Luminaire Service Manual Page 8
Section 2 Service
Words of Caution:
High Voltage
Use caution when servicing. When servicing the unit, potentially
dangerous high voltage levels are exposed. Disconnect the
power cord whenever possible to avoid electric shock.
Static Electricity (ESD)
Adhere to standard ESD practices at all times when servicing this
equipment. Many of the electronic devices in this equipment are
static sensitive, and may suffer catastrophic or latent failure if
handled improperly.
Heat
Lamps, power supplies, and heat sinks may emit extreme
amounts of heat during and after operation. Approach and
handle these and other potentially hot components with caution.
Finished Parts
Handle all finished parts with care. The finish can be easily scratched or damaged
from poor or improper handling.
Performance Checks
The following performance checks will help you (1) determine whether or not the system
is operating properly, and (2) isolates a problem, if there is one.
SFI Light Source/Luminaire Service Manual Page 9
Section 2 Service
System Set Up
Make sure the system is connected as follows:
1. Be sure that power is being provided by the wall outlet.
2. Be sure that the Lamp is installed properly.
3. Be sure that the cooling fan is turning when the unit is turned on.
4. The light source should produce a bright continuous white light with no
flickering after a warm-up period of 5-15 seconds.
If any of these conditions do not occur, see the troubleshooting section.
Calibrations
Not Applicable
SFI Light Source/Luminaire Service Manual Page 10
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