Welch Allyn 49500, 49502, 49504 User manual

Welch Allyn®Light Source

Light Source Menu

Service Manual

For Model Numbers: 49500, 49502, 49504 and 49506.

CONTENTS

Thank you for purchasing the Welch Allyn®Light Source, designed by a
leading worldwide manufacturer of illuminated diagnostic instruments.
By following the use and care guidelines given in this manual, you will be
rewarded with years of dependable, trouble-free service from your new
Light Source. Read these instructions thoroughly before use.

System Symbol Descriptions.......................... 1

Warnings and Precautions.............................. 2

System Description.......................................... 4

System Set-up/Operation ................................ 5

Mounting .......................................................... 6

Lamp Replacement .......................................... 7

Fuse Replacement .......................................... 8

Cleaning............................................................ 9

Specifications .................................................. 10

Troubleshooting Guide.................................... 11

Maintenance and Repair.................................. 12

Warranty and Service ...................................... 12

Ordering Information ...................................... 13

SYMBOL DESCRIPTIONS

Attention: Read Operating Manual for Warnings, Precautions,

and Instructions for Use.

Dangerous Voltage: Refer Servicing to Qualified Personnel.

Type B Equipment

Caution — Hot

Warning: Risk of Fire. Replace Fuses as Marked.

Light; Lighting; Illumination Intensity

INDICATIONS

Use of the Welch Allyn Light Source is indicated for medical lighting applica­tions requiring a remotely located, high-quality white light. This product must
only be used by qualified medical personnel.

CONTRAINDICATIONS

The use of the Welch Allyn Light Source is contraindicated for applications
where high intensity light might burn or damage tissue; such as for neonate
transillumination and ophthalmic procedures. For further contraindications,
the user must also consult the operating manual of the instrument being
used with the Light Source in the medical procedure.

1

W ARNINGS AND PRECAUTIONS

WARNING: Possible explosion hazard. Do not use in the

presence of flammable anesthetics. To ensure patient
and operator safety, read and understand this manual
before using the Welch Allyn Light Source.

Do not remove cover. Electrical shock hazard due to high
internal voltage. There are no user serviceable parts
inside except for the lamp and fuse, which are accessible
through the bottom and back cover panels. Refer all
service to Welch Allyn.

Replace fuses as marked. See Fuse Replacement
Section, page 8.

The high intensity light at the front of the light source
and at the tip of the Fiber Optic Bundle may give rise
to high temperatures and bright light. To minimize the
risk of injury, avoid direct viewing or contact with
sensitive tissues.

Do not use for neonate transillumination. Erythema
may result.

To prevent temporary blinding, always plug the fiber optic
bundle into the Welch Allyn Light Source before turning
the power ON.

Total system risk current — including the patient applied
instrument — should not exceed 100 microamps. An
isolation transformer is required if total system risk
current exceeds 100 microamps when accessories
are interconnected.

Do not sterilize the Welch Allyn Light Source. Refer to
Cleaning section for cleaning instructions.

Do not switch the Welch Allyn Light Source ON and OFF
in rapid succession. Doing so will dramatically shorten
lamp life. Allow lamp to cool down 10 to 15 seconds
between uses.

2

CAUTION: The Light Source should only be used by
qualified medical personnel.

Provide adequate ventilation to prevent overheating.
Do not cover or drape this light source. Provide a 3 inch
(7.62 cm) distance between the Welch Allyn Light Source
and any solid objects.

Grounding reliability is achieved only when connected
to hospital-use or hospital-grade receptacles. Inspect
electrical plug and cord routinely. Do not use if damage
is discovered.

Do not use or store liquids above or on the Welch Allyn
Light Source.

If this light source is used during invasive surgery, the
failure of a component within the system, causing loss
of illumination, may indirectly cause risk to the patient.
Therefore, it is recommended to have alternative means
of illumination available.

Since the light source uses a custom lamp, always have
a spare lamp available for replacement. Use caution
because lamp may be hot. Allow the lamp to cool before
replacing. Use only Welch Allyn supplied power cord.

3

SYSTEM DESCRIPTION

The Welch Allyn Light Source is used to supply high quality, white light
for video and optical illumination systems. It accepts standard ACMI
connectors.

Power Switch

Fan Grill

Fuse Drawer

AC Power

Fiber Optic
Bundle Port

Light
Control Knob

Input

Lamp Access
Knob

FRONT

Mounting Post

BOTTOM

BACK

Mounting Bracket

4

SET-UP AND OPERATION

After a 15 second warm-up period, the light output will stabilize at its
normal intensity. The fiber optic bundle must be plugged in to stabilize
light output.

CAUTION: Verify that the supply voltage matches the voltage

range indicated on the rear of the Welch Allyn Light Source.
To prevent temporary blinding, turn power on only after the

fiber optic bundle is plugged in and the intensity control knob
is set to the minimum position.

The fiber optic bundle port is hot when fiber optic bundle
is removed.

1. Plug the Welch Allyn Light Source into a hospital-grade receptacle.

2. Turn the light-intensity control knob to its minimum position. Plug the fiber
optic bundle into the illuminator port and connect the opposite end to the
instrument.

3. Turn the power switch to the on position. The lamp will take 15 seconds
to complete its warm-up cycle.

Minimum
Light Output

On

4. Set light intensity to desired level.

5. Turn unit off when not in use.

NOTE: Do not restart lamp immediately after turning off. The lamp
may fail to start. If this occurs, turn the power switch off and wait
15 seconds before restarting the Welch Allyn Light Source.

5

Maximum
Light Output

Fiber Optic
Bundle Port

Control Knob

MOUNTING

CAUTION: Do not cover or drape, light source generates heat.

For proper ventilation, maintain a clearance of 3 inches (8 cm)
around the unit, especially around the fan.

Secure bracket to a flat surface with screws provided. Align mounting post
on Light Source with mounting hole on bracket (View A). Slide mounting
lock until it clicks into place (View B). Light Source is now securely mounted
to table.

VIEW A

Supplied
Screws

VIEW B

Mounting
Post

Mounting
Bracket

Mounting
Lock

6

LAMP REPLACEMENT

CAUTION: Lamp may be hot. Allow the lamp to cool before

replacing.

1. Turn unit off and unplug the power cord from both the wall outlet and the
Welch Allyn Light Source.

2. Remove the lamp door from the bottom of the Welch Allyn Light Source
by unscrewing the lamp access knob on the back of the lightbox.

Lamp
Access
Knob

3. Disconnect the lamp connector assembly and remove the lamp from the
holding spring assembly.

Lamp Connection Assembly

Lamp

4. Replace with Welch Allyn replacement lamp #09500 only. Do not touch
the lamp itself, or the interior reflective surface of the lamp. Skin oils
on the lamp will cause premature lamp failure. Hold lamp by the outside
of the reflector or the connector only. Remove any grease or fingerprints
with a clean cotton swab moistened with alcohol. Do not leave any lint on
the lamp.

5. Reconnect the lamp to the lamp connector and place in the spring
mechanism. Be sure that the pin on the lamp is properly seated in

the slot on the lamp bracket.

Lamp
Access
Door

Holding Spring

Align Pin

6. Reattach the lamp door securely. The unit will not power up unless the
lamp door is seated properly.

7

FUSE REPLACEMENT

1. Turn the unit off and remove the power cord from both the wall outlet and
the Welch Allyn Light Source.

Fuse Holder

Fuse Holder

2. Use a small screwdriver to remove the fuse holder above the power cord
connector by releasing the spring-loaded snap connections.

3. Pull out the fuse holder.

4. Remove and replace with new fuses of the same type. There is no
required orientation of the fuses. Be sure to replace both fuses.

Snap
Connections

Fuses

5. Reinsert the fuse holder by pressing it into the power connector until it
snaps into place.

6. If the new fuse blows, immediately contact Welch Allyn Technical Service
at 315-685-4560.

8

CLEANING

NOTE: Welch Allyn Light Source should not be sterilized or

immersed.

1. Prior to cleaning, turn power off and disconnect the power cord from both
the wall outlet and the Welch Allyn Light Source.

2. The external surfaces may be cleaned by wiping with a cloth dampened
with mild soap and water or by using the following cleaning/disinfecting
solutions. DO NOT IMMERSE.

• Cidex, CidexPlus

• 70% isopropyl alcohol

• 10% mild bleach solution

• Metracide

• 10% Wescodyne

• Banicide

• Wavecide-01

3. The power cord may be wiped clean using the same cleaning/disinfecting
solutions listed above. Wipe dry with a clean cloth. Care must be taken
not to get the plug prongs wet. DO NOT IMMERSE.

4. Do not plug the unit into a wall outlet until it is thoroughly dry.

9

SPECIFICATIONS

ELECTRICAL

Input Voltage: 100 - 240 VAC, 50 - 60 Hz
Input Current: 1A (@ 100 VAC)
Output: 60 VDC @ 0.4A
Leakage Current: less than 100 microamps

DIMENSIONS

8.2" (21 cm) (L) x 3.1" (8 cm) (W) x 5.2" (13 cm) (H)

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

APPROV ALS

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 I, Type B, Continuous Operation

FUSES

T1.0A L250V: 1.0A, 250V, time lag (slow-blow),
low breaking capacity

10

TROUBLESHOOTING

If lamp is not
illuminating and …

fan is not operating.

POSSIBLE CAUSE SOLUTION

Light Source is not plugged
into either the wall outlet or
the power cord socket.

Power switch is not
turned on.

The bottom cover is not
properly installed.

One or both fuses have
blown.

Power cord is damaged.
This may cause intermittent
operation.

No power is supplied to
the wall outlet.

Plug the power cord into the
wall outlet and power cord
socket at back of unit.

Depress the “I” side of the
power switch.

Remove the bottom cover
and reinstall carefully,
making sure that the lip on
the bottom fits into the front
of the housing and that the
thumbscrew is fully tightened.

Replace both fuses. Follow
the instructions in the fuse
replacement section. If fuses
continue to blow, return Light
Source to an authorized
repair center.

Replace the power cord with a
new Welch Allyn power cord.

Verify that the wall outlet
has power by checking the
circuit breaker status and by
operating other equipment
at that wall outlet.

fan is operating.

The lamp was not able to
“cool down” before restarting.

The Light Source has
overheated.

The lamp has burned out.

11

Wait at least 15 seconds
after turning the Light Source
off before turning it back on.

Verify that all ventilation
slots and the fan area are
not obstructed. The Light
Source should be mounted
on the supplied mounting
bracket and there should
always be at least
3-inches clearance.

Replace with a new Welch
Allyn lamp. Refer to the
lamp replacement section.

MAINTENANCE AND REPAIR

For minor trouble, refer to the troubleshooting section in this manual for
possible causes and corrective action.

Only qualified personnel should make electrical inspections of the
Welch Allyn Light Source.

Repair: To locate qualified personnel, contact your local authorized
Welch Allyn distributor, or call Welch Allyn directly at 315-685-4560.

WARRANTY AND SERVICE

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
manufacturer’s 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 manufacturer’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 HI•Lux 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
manufacturer’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.

12

ORDERING INFORMATION

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

REPLACEMENT PARTS
09500 24W HI•Lux Lamp
76500 U.S.A. Power Cord
76502 European Power Cord
76504 U.K. Power Cord
76506 Australian Power Cord

13

4341 State Street Road

Skaneateles Falls, NY 13153

Telephone: [phone]

FAX: [phone]

Part # 495002

Printed in U.S.A.