Welch Allyn HLS-24-0 User manual

Welch Allyn Solarc
Light Source/Illuminator
Service Manual
Models: 49500,49502,49504,49506,
HLS-24-0,HLS-24-2,HLS-24-4,HLS24-6
Copyright 1996
Welch Allyn Inc.
4341 State Street Road
P.O Box 220
Skaneateles Falls, NY 13153-0220
P/N 495621 Rev. B
Light Source Menu
Operation Manual

Introduction
Light Source/Illuminator Service Manual Page 2
Revision (History) Page
Rev. Description of Change ECN # Date Initial
A New Release 5-33806 10/10/96 JSJ
B Update, Remove section revisions,
replace fuse P/N 5-34456 1/14/97 JSJ/MD

Introduction
Light Source/Illuminator Service Manual Page 3
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 responsibilityfor 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, 1 800 669-9771, [phone]
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
[phone]
Limited Warranty

Introduction
Light Source/Illuminator Service Manual Page 4
49501Medical Light Source...Welch Allyn warrants the Welch Allyn Light Source when
new, to be free of defects in material and workmanship and to perform in accordance with
manufacture' specifications when subject to normal use and service for a period of three
years from the date of purchase from Welch Allyn or an authorized agent. Welch Allyn
will either repair or replace any components found to be defective or at variance from
manufacture's specifications within this time at no cost to the customer. It shall be the
purchaser's responsibility to return the instrument directly to the authorized distributor,
agent, or service representative. This warranty does not cover the Solarc Lamp or breakage
or failure due to tampering, misuse, neglect, accidents, improper installation, modification,
shipping, or to improper maintenance, service, and cleaning procedures. This warranty
is also void if the instrument is not used in accordance with manufacture's
recommendations or if required or serviced by other than Welch Allyn or an authorized
agent. Purchase date determines warranty requirements. No other express or implied
warranty is given.
HLS24 Industrial Illuminator...Welch Allyn warrants the Welch Allyn Illuminator when
new, to be free of defects in material and workmanship and to perform in accordance with
manufacture' specifications when subject to normal use and service for a period of one year
from the date of purchase from Welch Allyn or an authorized agent. Welch Allyn will
either repair or replace any components found to be defective or at variance from
manufacture's specifications within this time at no cost to the customer. It shall be the
purchaser's responsibility to return the instrument directly to the authorized distributor,
agent, or service representative. This warranty does not cover the Solarc Lamp or breakage
or failure due to tampering, misuse, neglect, accidents, improper installation, modification,
shipping, or to improper maintenance, service, and cleaning procedures. This warranty
is also void if the instrument is not used in accordance with manufacture's
recommendations or if required or serviced by other than Welch Allyn or an authorized
agent. Purchase date determines warranty requirements. No other express or implied
warranty is given.
For service assistance or questions regarding this warranty, please call
Welch Allyn Medical Technical Service Department at 1 800 669-9771, or
[phone].

Introduction
Light Source/Illuminator Service Manual Page 5
Table of Contents
SECTION 1: General Information
BasicSystemDescription ...............................................................7
Specifications ........................................................................8
SECTION 2: Service
Intent of Manual ......................................................................9
Required Tools .......................................................................9
WordsofCaution ....................................................................10
PerformanceCheck ..................................................................11
Calibration .........................................................................11
SECTION 3: Problem Solving
Troubleshooting .................................................................. 12-13
SECTION 4: Disassembly and Repair
Part Identification ....................................................................14
LeftHousingAssy ....................................................................15
BallastBoard .......................................................................16
Power Supply .......................................................................16
Fan / Secondary Wire Harness Asy ......................................................17
LampCoverSafetyInterlockSwitch ......................................................18
PowerSwitch .......................................................................18
SECTION 5: Maintenance
Preventative Maintenance ..............................................................20
Cleaning ...........................................................................20
Checking Ground Impedance ..........................................................21
Measuring Leakage Current ......................................................... 21-22
FuseorLampReplacement ............................................................23
SECTION 6: Theory of Operations
Introduction .........................................................................24
StartUpRoutine .....................................................................24
Power Supply .......................................................................25
BallastBoard........................................................................25

Introduction
Light Source/Illuminator Service Manual Page 6
APPENDIX A: Schematics/Diagrams
Table of Drawings (Appendix A)
Drawing Number Description
N/A Parts Lst/Recomended Inventory
495000 ACMI Light Box Asm
495064 Right Housing Asm
495072 Internal Chassis Asm
495078 Secondary Wire Harness Asm
495102 Interconnect Diagram
A03387 Illuminator Electrical Safety Test Secification
Drawings and specs are for reference only. Consult factory for current revisions.

Light Source/Illuminator Service Manual Page 7
General Information
Basic System Description
Model # 49501 is a medical light source which is used in conjunction with several Welch Allyn
medical instruments. This model has a built in Infrared filter to limit the heat generated by the
light. It also has an external ferrite bead built into the power cord to meet Electromagnetic
Interference (EMI) requirements, as required by medical standards.
Model HLS-24-0 is an industrial illuminator which can be used in many industrial applications.
The HLS-24-0 is also known at Welch Allyn as a 49501I (The I indicates that the unit is for
industrial use only). This instrument is identical to the 49501 medical light source with the
deletion of the Infrared filter and the Ferrite bead.
49500....Welch Allyn Light Source
100-240 VAC
50/60 Hz
U.S.A. Plug Type
49502...Welch Allyn Light Source
100-240 VAC
50/60 Hz
European Plug Type
49504...Welch Allyn Light Source
100-240 VAC
50/60 Hz
U.K. Plug Type
49506...Welch Allyn Light Source
100-240 VAC
50/60 Hz
Australian Plug Type
HLS24-0...Welch Allyn Illuminator
100-240 VAC
50/60 Hz
U.S.A. Plug type
HLS24-2...Welch Allyn Illuminator
100-240 VAC
50/60 Hz
European Plug type
HLS24-4...Welch Allyn Illuminator
100-240 VAC
50/60 Hz
U.K. Plug type
HLS24-6...Welch Allyn Illuminator
100-240 VAC
50/60 Hz
Australian Plug Type

Section 1 General Information
Light Source/Illuminator Service Manua Page 8
Specifications
Electrical
Input Voltage: 100-240 VAC, 50-60 Hz
Input Current: 1Amp (@ 100VAC)
Output: 60VDC @.4A
Leakage Current: Less than 100 microamps
Dimensions
HxWxD: 8.2" x 3.1" x 5.2" (21cm x 8cm x 13cm)
Weight: 2.5 Pounds
Illumination System
Welch Allyn HI-Lux Lamp
Color Temperature: 5500
 K
Lamp: 60 Volts, 24 Watts
Lamp Life: 300 hours average
Dimming System
Manual Shutter: 20% to 100%
Fiber Optic Bundle Interface
Standard ACMI Connector
Approvals
UL 2601-1 IEC 801-2,3,4,5
CSA C22.2 No. 601.1-M90 EN 55011
IEC 601-1 Australia AS3200
IEC 601-1-2
CE
The CE mark on this product indicates it has been tested to and conforms with the provisions noted within
the 93/42/EEC Medical Device Directive.
Declarations of Conformity are held by Welch Allyn's European Representative.
European Regulatory Manager
Welch Allyn Ltd.,
Kells Road, Navan,
County Meath, Republic of Ireland.
Tel [phone]
Fax [phone]
Environment
Operating: 60  F (15  C) to 85  F (30  C)
Storage: -13
 F (-25  C) to 140  F (60  C)
Equipment Classification
Class 1, Type B, Continuous Operation
FusesT1.0A L250V: 1.0 A, 250 V, Time Lag (Slow-Blow), Low Breaking Capacity.

Light Source/Illuminator Service Manual Page 9
Service
Intent of Manual
The purpose of this manual is to provide Welch Allyn Inc. authorized service representatives with
systematic guidelines for preventative maintenance, problem identification, and service of the
Solarc Light Source/Illuminator. We have included the theory of operation schematic diagrams,
simplified drawings, service tips and procedures to assist a trained service representative with
board-level repairs. Should you encounter problems that are beyond the scope of this manual,
please contact the Technical Service Department of Welch Allyn's Medical Products for assistance.
Required Tools for Service
1. 11/32 Nut Driver
2. Screwdriver: Phillips #1
3. Long Nose Pliers
4. Wire Cutters Xcelite 54CG
5. 1/16" Drill bit and Pin-Vise
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.

Section 2 Service
Light Source/Illuminator Service Manual Page 10
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.