BiliBlanket Plus High Output System Operation , Maintenance and Service Manual April 2000

User Responsibility This Product will perform in conformity with the description thereof contained in this operating manual and accompanying labels and/or inserts, when assembled, operated, maintained and repaired in accordance with the instructions provided. This Product must be checked periodically. A defective Product should not be used. Parts that are broken, missing, plainly worn, distorted or contaminated should be replaced immediately. Should such repair or replacement become necessary, Ohmeda recommends that a telephone or written request for service advice be made to the nearest Ohmeda Regional Service Center. This Product or any of its parts should not be repaired other than in accordance with written instructions provided by Ohmeda and by Ohmeda trained personnel. The Product must not be altered without Ohmeda’s prior written approval. The user of this Product shall have the sole responsibility for any malfunction which results from improper use, faulty maintenance, improper repair, damage or alteration by anyone other than Ohmeda.

CAUTION

w Federal law in the USA and Canada restricts this device to sale by or on the order of a licensed medical practitioner.

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Table of Contents 1/General Information ... 1 Description ... 1 Light source controls, indicators and connectors ... 4 Accessories and replacement parts ... 6

2/Operation ... 1 Checkout procedure before operation ... 2 Checkout procedure ... 2 Using the BiliBlanket Plus High Output Phototherapy System ... 3 Using the transilluminator ... 6

3/Maintenance ... 1 Maintenance schedule ... 1 Operator maintenance ... 1 Service maintenance ... 1 Cleaning and disinfecting ... 1 Bulb replacement ... 2 Cleaning the fan filter ... 4 Attaching the dovetail rail mounting bracket accessory ... 4

4/Service ... 1 Repair policy and procedure ... 1 Troubleshooting ... 2 Functional description ... 3 Repair procedures ... 4 Replacing a fuse ... 5 Replacing the light source cover ... 6 Replacing the PC board ... 6 Replacing the cooling fan ... 6 Replacing the brightness control ... 7 Replacing the power supply ... 7 Replacing the thermal cutout switch ... 8 Replacing the optical filter assembly ... 8 Replacing the bulb holder ... 9 Replacing the power inlet module ... 9 Replacing a bezel/hour meter ... 10 Replacing a front bezel label ... 10 Electrical safety procedures ... 11 Ground continuity ... 11 Leakage current ... 11 Light Output Measurement ... 11 Illustrated service parts ... 13 Schematics ... 17

Appendix ... 1 Specifications ... 1 i

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General Precautions IMPORTANT CLINICAL INFORMATION PLEASE READ CAREFULLY BEFORE USING THIS DEVICE

Care of the Skin The skin serves as a protective barrier against chemical, mechanical, and biological insults. The skin is also important in the regulation of body temperature and serves as a route of water excretion, especially in premature infants. The introduction of new intensive-care techniques has been associated with the increased survival of very small, premature infants. The immaturity of the skin of the very low weight infants, coupled with excessive instrumentation and handling, poses previously unrecognized problems for the nursing care of these infants1. Please read, evaluate and implement the following recommendations as appropriate: 1. Please refer to the following standard of skin care recommendations as given in the literature2 when utilizing this device with all infants. Special attention should be given to sanitation and skin integrity. • Observe color, rashes, excoriation • Clean skin with warm water • Clean perineal area after stooling • Change infant’s position every 2 hours 2. This device is intended only for the treatment of existing hyperbilirubinemia. Use of this device for prophylactic treatment, particularly of premature infants, is not recommended. These infants have extremely fragile skin3 and various clinical studies have produced inconsistent conclusions concerning the effectiveness of prophylactic phototherapy treatment 4 5.

ii

1

NAACOG(1992), OGN Nursing Practice Resource, Neonatal Skin Care, NAACOG.

2

ibid

3

Rutter, N., The immature skin, British Medical Bulletin, Vol. 44, No. 4, 1988

4

Curtis-Cohen, M., et al, Randomized trial of prophylactic phototherapy in the infant with very low birth weight, TheJournal of Pediatrics, July, 1985

5

Brown, A., et al, Efficacy of Phototherapy in Prevention and Management of Neonatal Hyberbilirubinemia, Pediatrics, February , 1988

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General Precautions Definitions What the attention symbol means

Next to each warning or caution, we have placed an “attention, read accompanying documents” symbol to alert you to the presence of these important statements. This is the attention symbol:

w When the attention symbol appears in front of text that is printed on the system itself, it means that the text is elaborated upon in the operation manual. WARNING: A Warning statement is used when the possibility of injury to the patient or the operator exists. CAUTION: A Caution statement is used when the possibility of damage to the equipment exists.

~

Indicates alternating current.

m

Indicates IEC Type B equipment.

T

This letter appearing before a fuselink value indicates a time delay fuselink. Important: An Important statement is similar to a note but is used for greater emphasis. Note: A Note provided additional information to clarify a point in the text. The following are general Warnings and Cautions. Precautions specific to certain procedures are found in the text of the manual.

WARNINGS

w Do not use the BiliBlanket Plus Phototherapy System in the presence of flammable anesthetics; a possible explosion hazard exists under these conditions. Service described in this manual must be performed by a technically competent individual as described in this manual. Detailed drawings and procedures for more extensive repairs are included in this manual solely for the convenience of qualified personnel having proper knowledge, tools and test equipment, or for Ohmeda service representatives.

CAUTIONS

w Servicing of this product in accordance with this service manual should never be undertaken without the proper tools, test equipment and the most recent revision of this service manual which is clearly and thoroughly understood.

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1/General Information In this Section Description ...1-1 Light source controls, indicators and connectors ... 1-4 Light source and pad ... 1-4 Light source back panel ... 1-5 Accessories and replacement parts ... 1-5

WARNING

w Do not turn on or operate the BiliBlanket Plus High Output Phototherapy System in the presence of a flammable anesthetics; a possible explosion hazard exists under these conditions.

General Information This manual describes how to checkout, operate and maintain the Ohmeda BiliBlanket Plus High Output Phototherapy System. It also describes for the technically competent person how to service the BiliBlanket Plus High Output. Before using the BiliBlanket Plus High Output Phototherapy System • Read through sections one through three of this manual. • Pay special attention to the Warnings and Cautions which appear in the manual. • Read the User Responsibility statement located on the inside front cover; it describes what is expected of the user to maintain a safe and accurate product. • Read the Warranty; it describes Ohmeda’s responsibility in case of a functional defect. Keep this manual available for answering questions which may arise.

Description The new BiliBlanket Plus High Output pad, which can be identified by the gray cable, provides higher intensity levels than the original BiliBlanket Plus High Output pad with the white cable. Both pads can be used with the BiliBlanket Plus High Output or BiliBlanket Plus High Output light source box, however, the pad with the white cable will provide lower intensity levels. The Ohmeda BiliBlanket Plus High Output Phototherapy System uses a fiber optic cable to deliver light from a high intensity lamp to a woven fiber optic pad. The pad is placed in a disposable cover that is in contact with the patient. The patient is exposed to light in the ideal 400 to 550 nanometer range for phototherapy treatment. On units with the transilluminator option, unfiltered light in the visible spectrum travels through a flexible light pipe to appear at the tip of the transilluminator cable. The light from the cable is used to facilitate vascular sticks or injections. It is also used to find pneumothoraces. The BiliBlanket Plus High Output Phototherapy system consists of a light source unit and a light pad with a four foot long fiber optic cable. The light source unit contains a lamp, light filters, a variable power supply for the light source, a cooling system and overheating protection near the lamp. The light source lamp is a high intensity, tungsten halogen bulb with a built-in reflector. The reflector is coated with a dichroic surface which reduces the infrared energy transmitted. This bulb is specifically manufactured for use with the BiliBlanket Plus High Output.

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1/General Information A light filter, positioned in front of the lamp, rejects light outside the 400 to 550 nanometer range. This filter blocks nearly all ultra-violet and infrared light; only the blue light is allowed to pass. This filtered light is focused on the inlet of the fiber optic cable. Light intensity may be selected by the front panel brightness rotary control. Control range is from 19± 4.75 µW/cm2/nm at full counter clockwise to 45± 11.25 µW/cm2/nm at full clockwise with a medium detent at 32± 8 µW/cm2/nm. See Light Output Measurement Procedures in Section 4 for precise light output measurement. Mode select Selects the operating mode ; phototherapy or transillumination. Using the Ohmeda transilluminator light pipe, the BiliBlanket Plus High Output System can be used as a transilluminator. Supply power Power for the light source unit can be supplied by any standard AC mains power source at either 50 or 60 Hz that have voltages in the range: 90 - 132 or 180 - 264. Power enters the light source through a receptacle that has an integral power switch. Cooling A fan cools the light source unit. A thermal cutout switch located next to the light-filter protects the light source unit and fiber optic cable or transilluminator from overheating. Fiber optic cable The fiber optic cable contains 2400 individual plastic fibers which transmit the light from the light source to the light pad. The light pad is constructed by weaving these fibers into a mat. This patented process produces a pad with light over the entire surface. These fibers are randomized in the cable to eliminate any local intensity gradients due to bulb hot spots, dust on the filter, dust on the cable end, etc. This allows the nearly uniform, continuous blanket of light. A disposable protective pad cover is provided to reduce the risk of cross-contamination and make the patient more comfortable. Disposable cover The disposable cover is designed for use with both premature and full-term infants. The infant lies directly on the disposable-covered pad without any method of attachment between the pad and the infant.

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1/General Information Disposable vest A disposable vest is designed to secure the fiber optic pad to the infant. With the disposable vest, it is possible to hold and nurse the infant while continuing phototherapy treatment. The disposable cover should be used for premature infants and fullterm infants who can’t tolerate having the vest secured around the midsection. Transilluminator The transilluminator light pipe contains plastic fibers which transmit light from the light source to the tip.

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1/General Information Light source controls, indicators and connectors

8

7

2

1

3

4

5

6

Transilluminator Unit

2

3

4

6

CI.29.001,.002

1

Nontransilluminator Unit

Figure 1-1 Light source, pad and transilluminator cable 1-4

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1/General Information Refer to Figure 1-1. Power indicator 1. The green light-emitting diode (LED) lights when the light source unit power is on. Air flow failure indicator 2. The red light-emitting diode (LED) lights when there is an air flow failure. Timer 3. Nonresettable timer runs whenever the bulb is turned on. Brightness selector 4. The rotary control selects the light intensity, and has a center detent at the medium intensity position. (see Table 1-1 for light intensity values). Mode select 5. The mode select slide selects the operating mode: phototherapy or transilluminator. Light source port 6. The light source port is for attaching the fiber optic cable connector or transilluminator. Pad assembly 7. The pad assembly attaches to the light source port. Light is fed through the optical fiber cable to the optical fiber woven pad. Transilluminator cable 8. The cable attaches to the light source port. Light appears at the tip.

CI..29.003

BiliBlanket Plus High Output Phototherapy System

1

2

Figure 1-2 Light source back Refer to Figure 1-2. Power cord receptacle 1.

The power cord plugs into the power cord receptacle.

Power switch 2.

1-5

The power switch switches the light source unit on.

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1/General Information Accessories and replacement parts Table 1-2 Stock number

Item

6600-0213-800 6600-0270-200 6600-0461-200 6700-0025-800 6700-0014-800 6600-1974-101 6600-0656-801 6600-0656-802 6600-0656-803 6600-0656-804 6600-0656-805 6600-0656-806 6600-0656-807 6600-0656-808 6600-0656-809 6600-0656-810 6600-0656-811 6600-0730-207 6050-0002-259 6030-0000-006 6600-0522-800 6600-0031-900 6600-0198-800 6600-0680-200 6600-0531-800

Carrying case Disposable covers (50) Disposable vest (50) Mobile stand, less accessories Mobile stand slide bracket assembly, female User card Pad assembly, English Pad assembly, French Pad assembly, Spanish Pad assembly, German Pad assembly, Italian Pad assembly, Swedish Pad assembly, Japanese Pad assembly, Russian Pad assembly, Greek Pad assembly, Dutch Pad assembly, Portuguese Power Cord, North America (120V) Power Cord, United Kingdom Power Cord, Continental Europe Transilluminator Dovetail rail mount slide bracket kit, female (See A, Figure 1-3) Dovetail rail mount slide bracket accessory, male* (See B, Figure 1-3) Replacement lamps (6) Transilluminator or accessories pouch

* Allows the BiliBlanket Plus High Output to be attached to the dovetail rail mount slide bracket by using two of the mounting screws on the left side of the light source unit.

B 6600-0198-800

CI.01.032,033

A 6600-0031-900

Figure 1-3 Slide mounting bracket accessory slides into a dovetail mount slide bracket Dovetail rail systems are used to mount accessories on Ohio® Care Plus® incubators and Infant Warmer Systems. 1-6

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2/Operation In this section Checkout procedure before operation ... 2-2 Using the BiliBlanket Plus High Output Phototherapy System ... 2-3 Using the Transilluminator ... 2-6

WARNING

w Do not use the BiliBlanket Plus High Output Phototherapy System in the presence of flammable anesthetics; a possible explosion hazard exists under these conditions.

Factors which affect light output and life Lamp light output and life are affected by various factors among which are: • Lamp variations • Brightness selector setting • Vibration and mechanical shock • Non-recommended lamp Bulb variations The light output from bulb to bulb may vary by as much as 10%. Intensity setting The bulb life will vary greatly with the intensity at which the light source is operated. For example, operating at the lowest brightness setting may yield a nominal bulb life of as high as 10,000 hours, but operating at the highest brightness setting may yield a nominal bulb life of as low as 800 hours. Vibration and mechanical shock Vibration and mechanical shock will significantly reduce the bulb life. Care should be taken when moving the light source. To maximize the bulb life, the light source should be mounted or placed on a surface which is stable and not exposed to vibration.

CAUTIONS

w Allow the light source to cool for a minimum of ten minutes before moving the light source or changing the bulb.

w To ensure the proper operation and light intensity, replace the lamp only with the proper lamp as listed in the Appendix. Use of other lamps will affect the performance of and may result in damage to the BiliBlanket Plus High Output Phototherapy System.

w Use only Ohmeda light pad assemblies or transilluminator cables. Light pads or transilluminators from other manufacturers can affect performance and may damage the unit.

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2/Operation Non-recommended lamps Using any lamp other than that recommended and distributed by Ohmeda for the BiliBlanket Plus High Output system will affect the performance of and may result in damage to the light source or the fiber optic pad or transilluminator.

Checkout procedure before operation Before operating the Ohmeda BiliBlanket Plus High Output Phototherapy System, the following steps should be taken to ensure that the BiliBlanket Plus High Output will provide effective phototherapy treatment or the transilluminator delivers the proper light. This checkout procedure assumes that you are familiar with the unit’s controls.

CAUTIONS

w Lamp life is greatly reduced if the lamp or the light source is subjected to shock or bumping, or if the unit is moved while the bulb is hot. Allow the bulb to cool for at least ten minutes before moving the unit.

w Do not allow the fiber optic cable, pad or transilluminator to rub on sharp or abrasive surfaces. The protective coverings may be damaged.

w Observe the following fiber optic cable and pad assembly and transilluminator guidelines: • If you hang the fiber optic cable and pad or transilluminator assembly for temporary storage on an IV pole, door, wall hook or similar item, do not pull the cable when removing it for use. Carefully lift the cable free of obstructions when ready to use it. • Do not lay the fiber optic cable or transilluminator where it could be crushed. • Do not place anything on the fiber optic cable or transilluminator. Not observing the guidelines may cause excessive stress and may: • damage the cable’s outer protective conduit, • damage the cable’s optical fibers, • decrease light intensity at the light pad or transilluminator.

Checkout procedure 1. Place the light source on a flat, level surface (or use the mounting slide bracket) to locate the light source within a few feet of the treatment location. 2. Verify that the air circulation vents on the sides of the light source are unobstructed. The air filter should be free from excessive amounts of lint.

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2/Operation CAUTION

w Do not block the air intake or outlet. 3. Examine the power cord, fiber optic cable and transilluminator cable for obvious signs of damage. Replace them if they are damaged. 4. Connect the power cord to the light source first and then to the line power supply. 5. Fully engage the fiber optic cable connector or transilluminator into the light source port.

CAUTION

w Do not scratch or soil the light-input end of the connector cable. Do not put sharp or heavy objects on the fiber optic pad, vest or connecting cable. 6. Select “|” on the power switch to turn the power on. The green power indicator light will light. 7. Using the brightness selector switch on the front panel, select any light intensity and ensure that light is being emitted from the pad. 8. Select “O” on the power switch to turn the power off.

WARNING

w A hot surface is exposed when the fiber optic cable is disconnected from the light source port. Do not insert fingers or foreign objects into the light source port whether the lamp is on or off.

Using the BiliBlanket Plus High Output Phototherapy System The disposable cover is designed for use with both premature and full-term infants. The infant lies directly on the covered pad without any method of attachment between the pad and the infant.

WARNING

w If there is a concern about exposure to direct light from the light pad, cover the patient’s eyes when using the BiliBlanket High Output Plus Phototherapy System to shield them or when the BiliBlanket Plus High Output is used in conjunction with conventional phototherapy lights. Eye patch use with the BiliBlanket Plus High Output may not be necessary under these conditions: 1. When using the vest. 2. When the pad is kept against the patient’s back. 3. When the patient is clothed after applying the pad to the patient’s chest or abdomen.

The disposable vest secures the fiber-optic pad to the infant. For premature and fullterm infants who cannot tolerate having the vest secured around the midsection, the disposable cover should be used. The infant, along with the light pad, may be covered or wrapped in a blanket. The infant will continue to receive effective phototherapy treatment as long as the disposablecovered, light-emitting section of the pad remains in contact with the skin. The disposable cover should be the only material between the light-emitting side of the pad and the infant’s skin. If the disposable cover becomes soiled, it should be replaced with a new cover. The disposable cover should also be replaced between patients. 2-3

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2/Operation The Pad must be covered with the disposable cover or disposable vest as described above. Do not use the Pad without the disposable cover or vest.

1. Inserting the light pad into the cover.

CI.01.007,008,009,010

Important:

2. Adhesive tabs fastened around the optic cable.

CI.01.007.f0296

1. Inserting the light pad into the vest.

2. Adhesive tabs fastened around the optic cable.

Figure 2-1 Inserting the light pad into the cover or vest

WARNINGS

w The light source unit is not waterproof. Locate the unit where it will not be exposed to liquids. Liquids that enter the unit can damage it and create an electric shock hazard.

w Never place the light source inside the infant compartment of a incubator, warmer or bassinet; these conditions expose the infant to possible injury. 2-4

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2/Operation 1. Mount the BiliBlanket Plus High Output System on a radiant warmer, incubator, or stand, or place it so that it sits on a flat, solid surface within a few feet of the baby. The light source can be placed flat on its side or upright. 2. Insert the fiber-optic pad into a new, disposable cover or vest. The white side of the disposable vest goes over the clear illuminating side of the pad. Be sure to insert the pad all the way in to the end of the vest/cover. See Figure 2-1. 3. Secure the cover or vest around the pad cable with the adhesive tabs. See Figure 2-1. 4. Connect the power cord to the light source and plug into a grounded electrical outlet. 5. Firmly place the fiber-optic cable connector into the light source port. Ensure that there is no pressure or strain on the cable. The cable disconnects easily from the light source as a safety precaution to help prevent the light source from being knocked over when the cable is pulled beyond its length during treatment. 6. Lay the covered light pad on the mattress or other flat surface with illuminating side (side without label) facing up. Place the infant’s back or chest directly on the white side of the pad with the tip of the pad at the baby’s shoulders and the pad’s cable at the infant’s feet. See Figure 2-2. Ensure that: •

as much of the infant’s skin is in direct contact with the lighted section of the pad as is possible (diapers may be worn)

•

there is nothing between the infant’s skin and the light pad other than the disposable cover (clothing may be worn over the pad)

•

the baby’s eyes are not directly exposed to the covered light pad.

7. When using the vest, wrap the strap section snug around the infant’s mid section to hold the pad in position and secure it with the tape tabs. See Figure 2-3. 8. Set the brightness variable intensity knob on the front panel to the intensity level prescribed. 9. Turn the power switch to on. The baby may be clothed or bundled in a blanket and will continue to receive effective phototherapy treatment as long as the lighted section of the pad remains in contact with the skin (it is light from the pad penetrating the outer few millimeters of skin which results in the isomerization of the bilirubin molecule). Using the vest, it is possible to hold and nurse the infant while continuing treatment.

CI.01.028

Important: Be sure that the maximum area of illumination is in contact with the patient’s skin.

Figure 2-2 Placing the infant onto the pad with cover 2-5

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CI.01.027,029

2/Operation

1. Place infant on light pad covered with a disposable vest.

2. Secure disposable vest around infant.

Placing the infant onto the pad with vest

CAUTION

w Lamp life is greatly reduced if the lamp or the light source is subjected to shock or bumping, or if the unit is moved while the bulb is hot. Allow the bulb to cool for at least ten minutes before moving the unit.

10. When the treatment is completed, switch off the light source power switch and remove the pad and vest. Remove and discard the disposable vest.

Using the transilluminator WARNING

w Light from the tip of the tranilluminator is a form of energy and can cause heating of the skin. Reposition the tip of the transilluminator often, particularly if you notice redness of the skin. In this case you may consider lowering the light output with the intensity control knob to avoid heat burn.

1. Remove the phototherapy fiber optic cable from the light source. 2. Using the mode select slide switch, select transilluminator. 3. Insert the transilluminator light pipe into light port. 4. Turn power switch on. 5. Adjust the light intensity using the variable intensity knob. 6. When the transilluminator is no longer needed, return to phototherapy mode. 7. Turn off the power switch. 8. Disconnect the transilluminator light pipe. 9. Using the mode selector switch, select phototherapy. 10. Connect the phototherapy cable to the light port.

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3/Maintenance In this section Maintenance schedule ...3-1 Operator maintenance ... 3-1 Service maintenance ... 3-1 Cleaning and disinfecting ... 3-1 Bulb replacement ... 3-2 Cleaning the fan filter ... 3-4 Attaching the dovetail rail bracket ... 3-4

Maintenance schedule Maintain the unit in accordance with the information below:

Operator maintenance After each patient:

Replace the disposable cover or vest.

Weekly or after each patient:

Clean the unit. Check the air filter on the side of the light source (see Figure 4-6) for lint and dust accumulation and vacuum clean if necessary.

Quarterly:

Clean the air filter. Clean the light input end of the phototherapy and transilluminator connector cables.

Note: This is the minimum cleaning frequency. The air filter must be cleaned whenever it appears dirty, depending on the concentration of lint and dust in the operating environment.

Service maintenance Annually

Perform the electrical safety procedures described in section 4/Service.

According to your health care institution protocol for electrical equipment

Ensure that the required light output is being emitted. Refer to Light Output Measurement Procedures. In order to achieve maximum treatment benefit, it is recommended that the light output be checked prior to use with each patient.

Cleaning and disinfecting WARNING

w Make sure the light source power cord is disconnected from the power source before cleaning and that the unit is completely dry before using it.

CAUTIONS

w Never immerse the light source in liquid. The electronic circuitry can be shortcircuited, causing permanent damage.

w Never immerse the pad, vest or connecting cable in liquid. w Use the cleaning solution sparingly on a cloth when cleaning the exterior of the light source. Do not saturate the unit - excessive solution may flow into the light source causing damage to internal components.

w Do not autoclave or gas sterilize the BiliBlanket Plus High Output Phototherapy System.

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3/Maintenance 1. Unplug the power cord and allow the light source to cool for at least ten minutes. 2. Clean the outside of the light source using a mild detergent solution on a damp cloth or sponge. Aqueous solutions which are both hospital disinfectants and mycobactericides may be used. Do not allow liquids to seep into the housing. Dry the light source surface with a clean, soft, cloth. 3. The pad assembly and transilluminator must be cleaned without immersing by using a disinfecting agent safe for use on the materials. Aqueous solutions which are both hospital disinfectants and mycobactericides may by used. Never use an abrasive cleaner on the pad, the cable, the connector or the transilluminator. 4. Thoroughly rinse the pad to remove any cleaning solution residue.

CAUTIONS

w Do not use a phenolic compound based cleaner. Phenolic compounds have been associated with elevated bilirubin levels in infants.

w Exposing the fiber-optic pad’s plastic cover to strong cleaning solutions or ultra-violet light can cause premature breakdown of the plastic material. Cleaning solutions that discolor the pad, such as iodine solutions, will reduce the pad’s light output. Do not place the pad in direct sunlight. Do not use iodine solutions, strong acids, strong alkali, or bleach solutions to clean the pad.

The following table lists some cleaning solutions: Generic Formulation:

Maximum concentration level:

Hydrogen peroxide

6%

Sodium hypochlorite

100 parts/million

Cavicide®

100% spray

Table 3-1 Cleaning and disinfecting solutions

Bulb replacement WARNINGS

w Disconnect the power cord from the power source before opening the bulb access door.

w Allow the bulb to cool for at least ten minutes before attempting to remove it.

CAUTION

w To ensure the proper operation and light intensity, replace the bulb only with the Ohmeda bulb listed in Specifications in the Appendix. Use of other bulbs will affect the performance of, and may result in damage to, the BiliBlanket Plus High Output Phototherapy System.

3-2

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3/Maintenance Note: Do not touch the center glass bulb or the mirror surface with your fingers. Contamination of the bulb may result in reduced lamp performance. If the bulb is touched during installation or if stains are noted, clean the bulb with alcohol and dry with a clean, soft cloth. Also, take care not to let the bulb wires touch the reflector when it is hot. Refer to figure 3-1 1. Switch off the light source and disconnect the power cord from the power source. 2. Turn the screw on the bulb access door one quarter turn counter-clockwise and open the door. 3. Gently move the lever next to the bulb from right to left, moving the lever and the bulb outward. Disconnect the connector, remove the bulb, and discard. 4. Move the lever back to its original position. 5. Firmly slide the bulb all the way into the socket until it “clicks” into position. Connect the pins of the new bulb into the bulb connector. 6. Close the lamp access panel and turn the panel screw a quarter turn clockwise.

WARNING

w Do not operate the lamp with the protective compartment door open. The lamp operates under pressure and high temperature and may shatter.

7.

Perform the checkout procedure detailed in section 2/Operation.

Bulb Compartment

Bulb Bulb connector

CI.17.011

Lever

Figure 3-1 Bulb replacement

CAUTION

w Lamp life is greatly reduced if the lamp or the light source is subjected to shock or bumping, or if the unit is moved while the bulb is hot. Allow the bulb to cool for at least ten minutes before moving the unit.

3-3

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