natus neoBLUE User manual

Service Manual

Caution: Federal Law (U.S.) restricts this device to sale or use by or on the order of a physician (or properly licensed
practitioner).
neoBLUE is a registered trademark of Natus Medical Incorporated.
Biliblanket is a registered trademark of Ohmeda Medical.
Bili-meter is a registered trademark of Olympic Medical.
© 2006 Natus Medical Incorporated. All rights reserved.
This manual may not be reprinted or copied in whole or in part without written consent from Natus Medical Inc. The
content of this manual may change without notice.
Corporate Headquarters
Natus Medical Inc.
1501 Industrial Road
San Carlos, CA USA 94070
Telephone [phone]
Fax [phone]
Technical Service [phone]
E-mail [email protected]
European Office
EU Representative
Fischer-Zoth Dianosesysteme GmbH
Walter-Kolbenhoff-Str. 34
D-82110 Germering
Germany
Telephone [phone]
Fax [phone]
E-mail [email protected]
www.natus.com
Phototherapy System and Device: Patent Application Pending 10/265,970
neoBLUE®LED Phototherapy System Service Manual
P/N 051296

neoBLUE® LED Phototherapy System Service Manual 1
PN 051296
Table of Contents
CHAPTER 1 Introduction
1.1 About this manual 5
1.1.1 Overview 5
1.1.2 Intended users 6
1.1.3 Manual conventions 6
1.2 Product description 6
1.3 Pictorial introduction to the neoBLUE system 7
1.4 Before you start 14
1.5 Contacting Natus Technical Support 14
CHAPTER 2 Routine Maintenance Procedures
2.1 Cleaning 15
2.1.1 Cleaning the light enclosure and accessories 16
2.1.2 Cleaning the light enclosure air filters 16
2.2 Safety testing 17
2.3 Performance Verification 18
2.3.1 Verifying general performance 19
2.3.2 Checking the light intensity 20
2.4 Adjusting light intensity 22

Table of Contents
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CHAPTER 3 Troubleshooting Guide
3.1 Troubleshooting the neoBLUE light 23
3.2 Troubleshooting the LED light current assembly 26
CHAPTER 4 Repair procedures
4.1 Removing the light diffuser 30
4.2 Removing the LED light panel 32
4.3 Removing the subplate 33
4.4 Removing components from the subplate 35
4.4.1 Removing the power supply assembly 36
4.4.2 Removing the LED light current assembly 37
4.4.3 Removing the subplate fan assembly 37
4.4.4 Removing the LED light panel cable 37
4.5 Replacing the subplate 38
4.6 Removing components from the enclosure 38
4.6.1 Removing the enclosure fan 39
4.6.2 Removing the AC power entry module 40
4.6.3 Removing the rocker switches 40
CHAPTER 5 Parts and Specifications
5.1 How to order parts 41
5.2 Parts in context 42
5.3 Parts list 45
5.4 Illustrations of major parts 50
5.5 Accessory pack 51
5.6 Specifications 53
Appendix: Technical Note on Photometers 55
Index 57

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List of Tables and Figures
Tables
TABLE 2-1 Ground Integrity 17
TABLE 2-2 Earth leakage current 17
TABLE 2-3 Enclosure leakage current 18
TABLE 2-4 Equipment 18
TABLE 3-1 Troubleshooting Guide 24
TABLE 4-1 Equipment 30
TABLE 4-2 Equipment 38
TABLE 5-1 Parts List for Natus neoBLUE system 45
TABLE 5-2 Accessory Pack 52
TABLE A-1 neoBLUE Light Intensity Output Conversion Chart 56
Figures
FIGURE 1-1 External, front view 8
FIGURE 1-2 External, rear view 9
FIGURE 1-3 Internal, view from top 10
FIGURE 1-4 Power supply 11
FIGURE 1-5 LED light current assembly 12

List of Tables and Figures
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FIGURE 1-6 Block diagram 13
FIGURE 2-1 Locating the filter 16
FIGURE 2-2 Measuring distance 20
FIGURE 2-3 Adjusting the potentiometers 22
FIGURE 4-1 Removing the diffuser 31
FIGURE 4-2 Removing the LED light panel 32
FIGURE 4-3 Detaching the subplate 34
FIGURE 4-4 Subplate components 36
FIGURE 4-5 Enclosure components 39
FIGURE 5-1 Subplate and its attachments 43
FIGURE 5-2 Enclosure and its attachments 44
FIGURE 5-3 LED light panel (item #1) 50
FIGURE 5-4 Enclosure (item #2) 50
FIGURE 5-5 Subplate (item #3) 51
FIGURE 5-6 LED light current assembly (item #4) 51

neoBLUE® LED Phototherapy System Service Manual 5
PN 051296
CHAPTER 1 Introduction
In this chapter:
1.1 About this manual 5
1.2 Product description 6
1.3 Pictorial introduction to the neoBLUE system 7
1.4 Before you start 14
1.5 Contacting Natus Technical Support 14
1.1 About this manual
1.1.1 Overview
This manual contains information needed for servicing the neoBLUE Phototherapy System.
•Description of the product and overview illustrations (Chapter 1)
•Troubleshooting guide (Chapter 2)
•Maintenance procedures (Chapter 3)
•Repair procedures (Chapter 4)

Chapter 1 Introduction
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•Parts and ordering information. (Chapter 5)
•Conversion chart for photometers of various brands. (Appendix A)
•Index
1.1.2 Intended users
This service manual is written for qualified biomedical technicians. It describes service tasks
which could lead to injury, or which could damage the device, if attempted by a person
without the requisite skills.
1.1.3 Manual conventions
Precautionary information is emphasized by being labeled as warning, caution or important.
Other explanatory information is highlighted with the word Note.
Throughout the manual, when parts are referred to in figures or in the text, the Item Number
from the Parts List (Chapter 5) is used to identify the part.
1.2 Product description
The neoBLUE LED Phototherapy System consists of two products – the neoBLUE
Phototherapy light source (light) and the neoBLUE Phototherapy Roll Stand (roll stand).
Type of information Usage
WA R N I N G Identifies conditions or practices that may result in injury or
death to the patient and/or user. Warnings are boxed and
preceded by a hazard symbol.
CAUTION: Precedes an action that may result in damage to or
malfunction of the device.
Important! An instruction provided to help ensure correct clinical
results and provide quality assurance to the phototherapy
procedures.
Note: Background information provided to clarify a particular
step or procedure. Information in this category is not
considered precautionary.

Pictorial introduction to the neoBLUE system
neoBLUE® LED Phototherapy System Service Manual 7
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These components provide a floor-standing, mobile, phototherapy light that delivers a narrow band
of high-intensity blue light via blue light emitting diodes (LEDs) to provide treatment for neonatal
hyperbilirubinemia.
Blue LEDs emit light in the range of 400 – 550 nm (peak wavelength 450-475 nm). There are two
light intensity settings, high and low. The light output is optimized to provide an average intensity
of 30-35 µW/cm2/nm at the high setting and 12-15 µW/cm2/nm at the low setting at 30 cm (12
inches) distance from the light enclosure.
LEDs have minimal light output degradation over their lifetime with proper use. Nevertheless, the
technician can adjust the output of the LEDs using two potentiometers located on the side of the
light enclosure. The light is expected to operate as specified at least 10,000 hours at the low
setting, and at least 3,000 hours at the high setting.
The roll stand is designed to hold 8 lbs of weight with a base designed to accommodate the weight
distribution of the light enclosure at any height or angle.
The light is mains-power operated. The power cord plugs into a receptacle at the power inlet at the
back of the light enclosure. A power cord strain relief bracket is provided to hold the power cord in
place.
1.3 Pictorial introduction to the neoBLUE system
This section is meant to acquaint you with the various views of the neoBLUE light that you will see
in the course of troubleshooting and repairing it. The item numbers and names used in the Parts
List (see Chapter 5) are used throughout the book whenever parts are discussed.
These pictures show the front and rear views of the light enclosure, and internal views showing
where the major components are located and some details. Also included is a block diagram.
WARNING Eye Protection: Do not look directly into the LEDs. Some people are
sensitive to blue light in the environment. Amber safety glasses shield
sensitive eyes, minimizing the effects of the blue light.
WARNING If an alternative stand is used, care must be taken to validate the load
capacity.

Chapter 1 Introduction
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FIGURE 1-1 External, front view
Item Description Notes
2Enclosure
8Light intensity rocker switch Sets intensity to high or low
9Target light rocker switch Controls red target light. Momentary action.
13 Calibration access cover Covers potentiometers for adjusting light intensity
23 Self tapping screw
24 Screw, 5/8”
89
23 24(x2) 13
2