ALGO® 5 Newborn Hearing Screener
____________________________________________________________________________________
Service Manual
ALGO® 5 Newborn Hearing Screener
____________________________________________________________________________________
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).
AABR, ALGO, Flexicouplers, Jelly Tabs and Natus are
registered trademarks of Natus Medical Incorporated.
Windows and Microsoft are registered trademarks of Microsoft Corporation
© Natus Medical Incorporated. April 2008
This manual may not be reprinted or copied in whole or in part without written consent from
Natus Medical Incorporated. The content of this manual may change without notice.
Natus Medical Incorporated Technical Service +1 888 496 2887
1501 Industrial Road Technical Service Fax +1 650 802 8680
San Carlos, CA 94070 E-mail: technical_service@natus.com
International Support - Please contact your local Distributor
Distributor locations can be found at www.natus.com
P/N 000976 Rev.A
Table of Contents
List of Figures and Tables..............................................................................................................................3
1. Introduction ............................................................................................................................................5
1.1. About this manual..........................................................................................................................5
1.1.1. Overview...............................................................................................................................5
1.1.2. Intended users......................................................................................................................5
1.1.3. Manual conventions..............................................................................................................5
1.2. Product description........................................................................................................................6
1.3. Pictorial introduction to the ALGO 5..............................................................................................7
1.4. Before you start...........................................................................................................................11
1.5. Contacting your Natus Technical Service...................................................................................11
2. Routine Maintenance Procedure.........................................................................................................12
2.1. Inspecting Accessory Parts.........................................................................................................12
2.2. Cleaning the ALGO 5..................................................................................................................12
2.2.1. Cleaning the Screener........................................................................................................12
2.2.2. Cleaning the cart ................................................................................................................13
2.3. Safety testing...............................................................................................................................13
2.3.1. Ground Integrity..................................................................................................................13
2.3.2. Earth leakage current.........................................................................................................14
2.3.3. Enclosure leakage current..................................................................................................14
2.4. Performance verification .............................................................................................................15
2.4.1. Equipment Check for the ALGO 5 screener.......................................................................15
2.4.2. Component tests ................................................................................................................20
2.4.2.1. General...............................................................................................................................20
2.4.2.2. ATA 5 Cable calibration due Warnings ..............................................................................21
3. Troubleshooting Guide.........................................................................................................................22
3.1. Troubleshooting the ALGO 5 ......................................................................................................23
3.2. Troubleshooting the Panel PC....................................................................................................25
3.2.1. Replacing the battery for the RTC (Real Time Clock) on the Panel PC.............................25
3.3. Troubleshooting the Isolation Transformer .................................................................................28
3.4. Troubleshooting the ATA 5 .........................................................................................................30
3.5. Troubleshooting the Preamp 5....................................................................................................31
3.6. Troubleshooting the PCA 5.........................................................................................................33
4. Technical Troubleshooting Guide........................................................................................................34
4.1. High Impedance..........................................................................................................................34
4.2. High Myogenic.............................................................................................................................35
4.3. High Refer Rate...........................................................................................................................36
4.4. High Ambient...............................................................................................................................37
5. Parts and Specifications ......................................................................................................................38
5.1. How to order parts.......................................................................................................................38
5.2. Parts list.......................................................................................................................................38
5.3. Specifications..............................................................................................................................40
6. Index ....................................................................................................................................................41
List of Figures and Tables
FIGURE 1: ALGO 5 — front view...................................................................................................................7
FIGURE 2: ALGO 5 — rear view (cover removed) ........................................................................................8
FIGURE 3: DSP Box.......................................................................................................................................9
FIGURE 4: Preamplifier 5 (Preamp 5)............................................................................................................9
FIGURE 5: Acoustic Transducer Assembly (ATA 5)....................................................................................10
FIGURE 6: Patient Cable Assembly (PCA 5)...............................................................................................10
FIGURE 7: Main Window .............................................................................................................................15
FIGURE 8: ALGO Check Kit.........................................................................................................................15
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FIGURE 9: Equipment check .......................................................................................................................16
FIGURE 10: DSP Box disconnected............................................................................................................17
FIGURE 11: Preamp 5 disconnected...........................................................................................................18
FIGURE 12: ATA 5 disconnected.................................................................................................................19
FIGURE 13: Equipment Check - Overview ..................................................................................................20
FIGURE 14: ATA 5 Cable calibration due Warnings....................................................................................21
FIGURE 15: Block Diagram wiring...............................................................................................................22
FIGURE 16: Troubleshooting the ALGO 5...................................................................................................23
FIGURE 17: Location of Panel PC outer shell screws.................................................................................25
FIGURE 18: View outer shell Panel PC .......................................................................................................26
FIGURE 19: Location of Battery on Motherboard Panel PC........................................................................26
FIGURE 20: Detail View RTC Battery on Panel PC.....................................................................................27
FIGURE 21: Open the power inlet module...................................................................................................28
FIGURE 22: Access to the fuse holder.........................................................................................................28
FIGURE 23: Fuse holder..............................................................................................................................29
FIGURE 24: Acoustic Check ........................................................................................................................30
FIGURE 25: Impedance Check....................................................................................................................31
FIGURE 26: Artifact Check...........................................................................................................................32
FIGURE 27: Impedance Check....................................................................................................................33
FIGURE 28: High Impedance.......................................................................................................................34
FIGURE 29: High Myogenic.........................................................................................................................35
FIGURE 30: High Refer Rate.......................................................................................................................36
FIGURE 31: High Ambient ...........................................................................................................................37
TABLE 1: Ground Integrity ...........................................................................................................................14
TABLE 2: Earth leakage current...................................................................................................................14
TABLE 3: Enclosure leakage current ...........................................................................................................14
TABLE 4: Parts List for Natus ALGO 5 system............................................................................................38
4 ALGO® 5 Newborn Hearing Screener Service Manual
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1. Introduction
1.1. About this manual
1.1.1. Overview
This manual contains information needed for servicing the ALGO® 5 Newborn Hearing
Screener.
• Description of the product and overview illustrations (Chapter 1)
• Maintenance Procedure (Chapter 2)
• Troubleshooting Guide (Chapter 3)
• Troubleshooting Flowcharts (Chapter 4)
• Installation and Assembly Instructions (Chapter Error! Reference source not
found.)
• Parts and ordering information (Chapter 5)
• 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.
Type of information Usage
Identifies conditions or practices that may result in injury or
WARNING
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.
An instruction provided to help ensure correct clinical
Important!
results and provide quality assurance to the screening
procedures.
Background information provided to clarify a particular step
Note:
or procedure. Information in this category is not considered
precautionary.
Precautionary Information
Important! Incorrect use of the screener and its accessories, or the use of parts and
accessories that are not manufactured or supplied by Natus Medical Incorporated, can
ALGO® 5 Newborn Hearing Screener Service Manual
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lead to incorrect results.
Do not use your screener if there is any suspicion that it is not functioning properly, or if
any parts appear damaged. Contact Natus Technical Service or your authorized service
representative.
Warning! Please avoid practices that can compromise the safe and effective use
of the ALGO 5:
• Do not remove the Panel PC computer from the ALGO 5 unless your service
representative specifically instructs you to do so. There are no user-serviceable parts
inside aside from replacement of the RTC Battery. Installation, modification, or
replacement of any circuit cards, or alteration of the CMOS configuration memory
outside of Natus instructions, may compromise the safe and effective operation of
this device and will void the warranty.
• There is no user access to the computer operating system. Never attempt to load
software into the ALGO 5 that has not been supplied or approved by Natus Medical.
Attempting to load any software or to attach computer accessories or other medical
devices that have not been provided or approved by Natus Medical is expressly
prohibited and will void the warranty.
• Misuse of the earphones or the earphone cable (that is, any use other than that
described in this manual) may result in screening at unknown and uncontrolled
decibel levels.
Warning! The ALGO 5 is not suitable for use in the presence of flammable
Anaesthetic Mixtures with Air, Oxygen, or Nitrous Oxide.
Warning! The ALGO 5 is an electrically isolated system only when the unit is
plugged in through the Isolation Transformer built into the cart and not connected
to any other external system. If the device is to be connected to a hospital
network, the optional LAN Isolator (P/N 040948) must be used between the Panel
PC and the hospital network to maintain electrical isolation of the device.
1.2. Product description
The ALGO 5 consists of several major components:
• Screening station (cart) for component storage and transport
• Isolation Transformer (to electrically isolate AC mains voltage provided by
hospital from ALGO 5 main power)
• Panel PC (the interface between the medical personnel and the equipment)
• Acoustic Transducer Assembly 5 (ATA 5) - (calibrated earphones to deliver
clicks to the patient’s ears)
• Patient Cable Assembly 5 (PCA 5) - (electrodes registering EEG signals from
the patient)
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• Preamplifier 5 (Preamp 5) - (amplifies signals from the electrodes, also serves
as isolation for the patient)
• DSP Box (processes digital signals from Preamp 5)
• Label printer
• Page printer (optional, available in inkjet or laser models)
• Bar code scanner (optional)
• LAN Isolator (optional)
1.3. Pictorial introduction to the ALGO 5
This section is meant to acquaint you with various views of the ALGO 5 that you will see
in the course of troubleshooting and repairing it. The item names used in the Parts List
(see Chapter 5) are used throughout the manual whenever parts are discussed.
Panel PC
DSP Box
Drawer for Disposables
Cart Column with Integrated
Cable Management
Isolation Transformer
FIGURE 1: ALGO 5 — front view
Keyboard
Label Printer
Shelf Space
Page Printer
(optional)
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Cart Column with
Integrated Cable
Management –
management for
ATA 5 & PCA 5
FIGURE 2: ALGO 5 — rear view (cover removed)
Rear View
DSP Box –
Rear View
Preamp Holder
Cable
Cables
Barcode
Scanner
(optional)
Power Supply
for DSP Box
mounted in the
column
Power Supply
for Label Printer
mounted in the
column
Optional Power
Supply for Inkjet
Page Printer
Main Switch
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p
Panel PC
Communication
cable
DSP Serial Number Label on to
Status LED
Power
Socket
FIGURE 3: DSP Box
Preamp 5 Cable
FIGURE 4: Preamplifier 5 (Preamp 5)
Connector
Hook
PCA Socket
Preamp
Socket
ATA Socket
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FIGURE 5: Acoustic Transducer Assembly (ATA 5)
Blue Transducer:
left ear
Red Transducer:
right ear
Connector
Connector
Nape - White
Common - Green
Vertex - Black
FIGURE 6: Patient Cable Assembly (PCA 5)
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1.4. Before you start
Observe Electrostatic Discharge (ESD) precautions when handling,
adjusting, or performing any procedure with the device internal
WARNING
components.
1.5. Contacting your Natus Technical Service
Should you encounter situations that are not covered by this Service Manual, contact a
Natus Technical Service representative.
Please have your Natus device model and serial number available when calling
Technical Service.
United States customers: Contact a Natus Technical Service Representative at:
Technical Service +1 888 496 2887
Technical Service Fax +1 650 802 8680
E-mail: technical_service@natus.com
International Support: Please contact your local Distributor.
Distributor locations can be found at www.natus.com
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2. Routine Maintenance Procedure
This chapter defines procedures for routine maintenance of the ALGO 5 screener. These
procedures must be performed after any of the following events and/or as prescribed by
the institution’s maintenance schedule:
• Institution first receives the ALGO 5 screener.
• Foreign material or liquid has been deposited on the ALGO 5 screener.
• ALGO 5 screener has been visually damaged or subjected to mechanical
shock (e.g. being dropped).
• ALGO 5 screener has been submitted for maintenance or scheduled
performance verification.
2.1. Inspecting Accessory Parts
Routinely inspect screener components as described below:
• Inspect earphone cable for damage (tears, cracks, exposed wires, etc.)
• Inspect sensor cable for proper connection to the Preamp 5, for worn or
broken insulation, and for looseness at the clips. Inspect Preamp 5 cable for
damage.
• Inspect power cord for fraying or other damage.
• If the screener is frequently moved to different locations or subjected to heavy
use, check regularly for external damage.
• Examine the Preamp 5 for cracks or dents that might have been caused by
repeated banging against the side of the screener or the edge of a crib.
• Replace accessories or have them repaired as needed.
Warning! Do not use the screener if you suspect that it is not functioning properly,
or if any parts appear damaged. Contact Natus Technical Service or your
authorized service representative.
2.2. Cleaning the ALGO 5
2.2.1. Cleaning the Screener
WARNING
To keep the screener clean, perform the following tasks regularly:
• Remove dust from the screener’s exterior with a soft brush or cloth.
• Clean the exterior case of the screener with a lightly water-dampened soft
cloth.
• To clean the Panel PC, dilute a volume of glass cleaner with an equal volume
of water. Spray a small amount of the diluted cleaner on a soft cloth and
gently wipe the screen.
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Turn off power and unplug the screener before cleaning.
CAUTION: Press gently on the Panel PC display! Too much pressure can cause
permanent damage. Do not spray diluted cleaner directly on the display.
• Clean the sensor and earphone cables with a cloth dampened with water,
isopropyl alcohol, or a 10% bleach solution. Do not stretch the cables.
Delicate shielding in the wires can be damaged, resulting in electrical shorting.
Refer to your hospital’s protocol for the frequency of cleaning equipment that
comes into contact with the patient.
• Wipe off any remaining dirt or spots on the screener and cables with a cloth
dampened with a mild solution of commercial detergent, hospital cleaning
agent and water, or isopropyl alcohol.
CAUTION: Do not spray or pour cleaners directly on the screener. Keep liquids,
including cleaning fluid, away from the screener’s keyboard, earphone
transducers, and other openings. Never spray cleaner directly onto the screener.
Never use harsh or abrasive chemical products to clean the screener. Do not
immerse patient cables or transducers in water or cleaning solutions.
2.2.2. Cleaning the cart
• The cart may be cleaned with most mild, non-abrasive solutions commonly used
in the hospital environment (e.g., diluted bleach, ammonia, or alcohol solutions).
• The surface finish will be permanently damaged by strong chemicals and solvents
such as acetone and trichloroethylene.
• Abrasive material such as steel wool should never be used to clean any
component of the cart.
• Never submerge the cart base or allow liquids to enter any component of the cart.
Wipe any cleaning agents off cart components immediately using a waterdampened cloth. Dry all components thoroughly after cleaning.
• Damage caused by the use of unapproved substances or processes will not be
covered by warranty. It is recommended that any cleaning solution be tested on
a small area of the cart that is not easily visible to verify compatibility.
CAUTION: To clean or sterilize mounted instruments or accessory equipment,
refer to the specific instructions delivered with those products. Consult your
hospital’s infection control officer or epidemiologist.
2.3. Safety testing
The safety tests meet the standards and are performed in accordance with, IEC
60601-1, (Amendment 1, Amendment 2,) and UL 60601, for instruments as Class
1 and Type BF and ANSI/NFPA Standard 99.
Applicable tests for these standards are listed in following sections (2.3.1-2.3.3).
Technicians must be familiar with the standards applicable to their institution and
country.
2.3.1. Ground Integrity
1. Unplug the ALGO 5 power cord from the wall outlet. Make sure it is a 3-prong
power cord (with ground).
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2. Using an Ohm Meter, measure impedance between the positive and negative
contacts to get a baseline impedance.
3. Using the Ohm Meter, measure the impedance from the ground pin on the outlet
plug to any screw on a cart column, such as the bracket that attaches the panel
PC to the column.
4. Subtract the measured value from the baseline value measured in step 2 to get
the ground integrity value. Verify that the impedance is less than 100 milliohm
(0.1 ohm).
5. Ground integrity should be checked whenever a shelf is adjusted in height.
TABLE 1: Ground Integrity
2.3.2. Earth leakage current
AC
Polarity
Normal Closed Closed 500 µA 300 µA
Reversed Closed Closed 500 µA 300 µA
Normal Open Closed 1000 µA 500 µA
Normal Closed Open 1000 µA 500 µA
TABLE 2: Earth leakage current
Line cord Neutral cord IEC 60601-1 UL 60601-1
2.3.3. Enclosure leakage current
AC line
cord
polarity
Normal Closed Closed 100 µA 300 µA
Normal Closed Open 500 µA 500 µA
Normal Open Closed 100 µA 300 µA
Reversed Closed Open 500 µA 500 µA
Reversed Open Closed 500 µA 300 µA
Reversed Closed Open 500 µA 500 µA
TABLE 3: Enclosure leakage current
AC line cord
neutral
conductor
100 milliohms or less
AC line cord ground
conductor
ANSI/NFPA 99
IEC 60601-1 UL 60601-1
ANSI/NFPA 99
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2.4. Performance verification
An equipment check is available using the Main Window of the Panel PC (see FIGURE 7
in Section 2.4.1). If the equipment check option is not available from the main window,
access the Service Menu from the Preferences panel to acquire rights via the Profile
Manager.
2.4.1. Equipment Check for the ALGO 5 screener
Access the Equipment Check from the main window:
FIGURE 7: Main Window
Use the ALGO Check Kit to run the Equipment Check:
FIGURE 8: ALGO Check Kit
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Equipment check F5
The Equipment Check comprises the following routines:
FIGURE 9: Equipment check
o Initialize Baseboard Test
DSP board runs a self-test and loads firmware
o Cable connection
Verifies connectivity of ATA 5 and Preamp 5
o Calibration dates
Shows calibration date of ATA 5 (refer to 2.4.2.2 – ATA 5 Cable calibration due )
o Artifact Test
Runs internal DSP test program
o Acoustic Test
Verifies ATA 5 equipment
o Impedance Test
Verifies electrical properties of PCA 5
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If the DSP Box is not connected to the Panel PC or the DSP Box power cord is disconnected,
the Initialize Baseboard Test will fail with the following Warning:
FIGURE 10: DSP Box disconnected
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If the Preamp 5 is disconnected, the Cable Connection Test shows a red icon with error
message below:
FIGURE 11: Preamp 5 disconnected
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If the ATA 5 cable is disconnected, the Cable Connection Test shows a red icon with the error
message below:
FIGURE 12: ATA 5 disconnected
If the ATA 5 cable is overdue for calibration, the Calibration Dates section in FIGURE 12
shows a red icon next to the <Next calibration> date. Please refer to chapter 2.4.2.2 –
ATA 5 Cable calibration due Warnings):
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The following figure gives an overview of the hardware components tested during the series of
Equipment Check tests.
DSP Box
Equipment
Check Kit
ATA 5 Cable
Preamp 5
FIGURE 13: Equipment Check - Overview
The following lists each step in the Equipment Check and identifies which device is
involved in the testing:
• DSP Box Test – DSP Box and Panel PC
• Cable Connections – ATA 5 and Preamp 5
• Calibration Date – ATA 5
• Artifact Test – DSP Box and Preamp 5
• Acoustic Test – ATA 5
• Impedance Test – PCA 5
2.4.2. Component tests
2.4.2.1. General
The Service Menu allows performing the following tests in non-screening mode:
• Print a test page on Page printer
• Print a test page on Label printer
• Scan a Bar code and view result
PCA 5 Cable
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2.4.2.2. ATA 5 Cable calibration due Warnings
The ALGO 5 checks the Due for calibration date of the ATA 5 each time the
screener is turned on. Different Warnings are issued related to the date the
screener is turned on. The procedure is described in FIGURE 14.
Time related Warnings in case ATA is due to calibration
Due date -90 days
Warning 1 Warning 2
Warning 1: Warning:The Acoustic Transducer requires re-calibration on …
Warning 2: Warning:Calibr ationhas expired on .. . Please renew the calibration of the acoustic transducer!
Disabled: Error: Calibration of the acousti c transducer has expir ed on .. . Please renew t he calibration of the aco ustic transducer!
Screening is no longer possible!
Due date Due date + 90 days
Screening
Disabled
FIGURE 14: ATA 5 Cable calibration due Warnings
Annual calibration of the ATA 5 cable verifies and/or sets the intensity level of the click or
output stimulus.
ATA 5 cable calibration may only be performed by a qualified representative of Natus
Medical. For instructions on returning the ATA 5 cable to Natus Medical, contact Natus
Technical Service or your local distributor.
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3. Troubleshooting Guide
This chapter assumes that you are a qualified biomedical technician who is familiar with the
ALGO 5 as described in Chapter 1.
Pa g e P ri n t e r
Isolation Transformer
120/
240 V~
AC
AC
DC
AC
Label Print e r
DC
AC
DC
AC
DSP Box
PREAMP
Pa n e l - PC
ATA
PCA
USB
RS 2 3 2
Keyboard
Barcode Scann er
FIGURE 15: Block Diagram wiring
Note: If inkjet page printer is used, that printer requires an auxiliary AC/DC power supply which
is supplied with the printer.
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3.1. Troubleshooting the ALGO 5
FIGURE 16: Troubleshooting the ALGO 5
Symptom Probable cause Corrective Action Reference
Panel PC does not
boot after Main switch
is turned on
DSP Box LED does
not emit
green
light after
Main
switch is
turned on
No power Verify that AC outlet
is functioning.
Power switch not in
correct position
Power cord not
plugged in all the
way, or defective
Ensure power switch
is in ON position.
Check to make sure
that power cord is
plugged in securely to
the device socket. If
the device still does
not turn on, try
another power cord.
Power cord for
AC/DC adapter loose
Verify that power cord
under the bottom
shelf is securely
plugged in at
transformer and at
AC/DC adapter.
Verify DC plug is
securely attached to
Panel PC.
Blown fuse Check the fuse in the
Isolation Transformer.
Damaged cable
Perform an end-to-
end continuity check
on the cables from
the AC outlets via the
Isolation Transformer
to the Panel PC DC
inlet cord. Voltage
should be 19 VDC.
BIOS settings reset The RTC battery may
need to be replaced.
Power cord for
AC/DC adapter loose
Verify that power cord
in cart column is
securely plugged in at
Transformer and at
AC/DC adapter.
Verify DC plug is
securely attached to
DSP Box.
Power cord for
AC/DC adapter
damaged
Check power cord of
AC/DC adapter.
Troubleshooting the
Isolation Transformer,
Section 3.3
Replacing the RTC
Battery, Section 3.2.1
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Symptom Probable cause Corrective Action Reference
AC/DC adapter
broken
Voltage should be 7
VDC. Replace
AC/DC adapter if
damaged.
DSP Box defect Replace DSP Box.
emits
orange
light after
screener
Communication cable
is not securely
plugged at PC side
DSP Box defect Replace DSP Box.
Make sure the cable
is plugged in all the
way into the COM1
port.
LED
is turned
on
Page
printer
Power
LED does
not light
up
Power cord damaged Replace power cord.
Power cord loose Verify that power cord
in cart column is
securely plugged in at
transformer and at
AC/DC adapter (ink
jet printer) or directly
to printer (laser
printer).
Printer defect Replace printer.
Printer
does not
respond
Printer interface cable
Replace cable.
defective
Printer defect Replace printer.
Label
printer
Power
LED does
not light
up
Power cord for
AC/DC adapter
damaged
Power cord loose Verify that power cord
Replace power cord.
in cart column is
securely plugged in at
Transformer and at
AC/DC adapter.
Verify DC plug is
securely attached to
Label printer.
Printer defect Replace printer.
Barcode
scanner
Printer
does not
respond
Barcode
scanner
Printer interface cable
defective
Replace interface
cable.
Printer defect Replace printer.
Barcode scanner
defect
Replace Barcode
scanner
does not
respond
Cart Roller is worn out Contact Natus
Technical Service.
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3.2. Troubleshooting the Panel PC
3.2.1. Replacing the battery for the RTC (Real Time Clock) on the Panel PC
Tools needed: Phillips Screwdriver, #2
• Unplug all the cables and power cords going to the Panel PC. Make note of
what ports cables are connected to.
• Remove the Panel PC from the cart and place it with the screen facing down
on a table.
• Remove the 11 M3 x 10mm Phillips screws (Natus P/N 800213) that hold the
outer shell on and remove the outer shell.
FIGURE 17: Location of Panel PC outer shell screws
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• Remove the 16 M3 x 5 mm Phillips screws (Natus P/N 800212) that hold the
inner shell on (including the 2 screws that attach the plate with the
connectors) and carefully pry it open to expose the motherboard.
FIGURE 18: View outer shell Panel PC
FIGURE 19: Location of Battery on Motherboard Panel PC
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• Remove the RTC battery and replace it with the recommended battery (P/N
000972, 3V coin-cell Lithium battery CR2032).
FIGURE 20: Detail View RTC Battery on Panel PC
• Reassemble the Panel PC by following the above steps in reverse, and mount
the Panel PC back on the cart. Take care to tighten the mounting screws on
the cart so that it is secure.
• After replacing the RTC Battery, it may be necessary to set the BIOS settings
on the Panel PC to automatically turn the Panel PC on when the main power
switch is turned on.
o After turning on the main power switch, press the button on the lower right
side of the Panel PC. Immediately press and hold down the Delete key
until “Entering Setup” appears.
o Select the “Power Management Setup” option, press Enter
o Select “PWR ON After PWR-Fail”. Press Enter, and select the option for
“On” and press Enter.
o Press F10 to save, type in “Y”, and press Enter. The system will then
reboot and should operate normally.
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3.3. Troubleshooting the Isolation Transformer
Follow the steps below to change the Isolation Transformer’s fuse:
• Unplug the power cable leading from the Isolation Transformer to the wall.
• Locate the power inlet module on the Isolation Transformer. Note the orientation of
the power inlet module so as to put it back in the same direction.
• Using a flat head screwdriver, open the power inlet module to access the fuse holder
(refer to FIGURE 21: Open the power inlet module ).
FIGURE 21: Open the power inlet module
• Using a flat head screwdriver, remove the fuse holder from the drawer (refer to
FIGURE 22)
FIGURE 22: Access to the fuse holder
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• The fuses should be installed as illustrated in below. There are 2 fuses -- one on
each side (refer to FIGURE 23).
FIGURE 23: Fuse holder
If the fuses are faulty, replace them with the following type of fuses:
115V:
6.3A,Slo-blw,5x20mm,250V
Natus Part number:000801
Suggested manufacturer: Schurter (P/N 0034.3125 )
230V:
3.15A,Slo-blw,5x20mm,250V
Natus Part number:000800
Suggested manufacturer: Schurter (P/N 0034.3122 )
Reverse the above steps to complete the fuse replacement, making sure that the
voltage selection is the same as it was before the fuses were replaced.
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3.4. Troubleshooting the ATA 5
•
Run the Acoustic Check as shown below. If Acoustic Check shows a failure condition,
refer to Section 4.3 – High Refer Rate and Section 4.4 – High Ambient.
FIGURE 24: Acoustic Check
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3.5. Troubleshooting the Preamp 5
• Run the Impedance and Artifact Checks as shown below. If the Impedance Check
shows a failure condition, refer to Section 4.1 – High Impedance.
FIGURE 25: Impedance Check
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• If the Artifact Check shows a failure condition, refer to Section 4.2 – High Myogenic.
FIGURE 26: Artifact Check
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3.6. Troubleshooting the PCA 5
•
Run the Impedance Check as shown below. If the Impedance Check shows a failure
condition, refer to Section 4.1 – High Impedance.
FIGURE 27: Impedance Check
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4. Technical Troubleshooting Guide
4.1. High Impedance
FIGURE 28: High Impedance
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4.2. High Myogenic
FIGURE 29: High Myogenic
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4.3. High Refer Rate
FIGURE 30: High Refer Rate
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4.4. High Ambient
FIGURE 31: High Ambient
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5. Parts and Specifications
5.1. How to order parts
Call Technical Service at 1-888-496-2887 to order parts or for general technical
information. A minimum order may be required for spare parts.
5.2. Parts list
The column headings in the Parts List table are:
Part# Natus part number, for ordering the part
Name Name of the part
Reference Reference to illustration elsewhere in Service Manual
See the ALGO 5 Assembly Instructions for additional details on part identification.
TABLE 4: Parts List for Natus ALGO 5 system
Part # Name
000540
000619
000696
000698
000699
000734
000739
000740
000741
000745
000779
000800
000801
000834
000839
000840
000847
000850
Rear Post Cover N/A
DSP Box with Communication
Cable
PCA 5 FIGURE 6
Preamp 5 FIGURE 4
ATA 5 FIGURE 5
PANEL PC FIGURE 1
Cart, (115V) FIGURE 1,2
DSP power supply n/a
Isolation Transformer
Drawer Slider Order in sets of two
Power Cord
Fuse (3.15A,Slo-blw,5x20mm,250V) FIGURE 23
Fuse (6.3A,Slo-blw,5x20mm,250V) FIGURE 23
Cart Base with Casters n/a
DSP Mounting Bracket n/a
Panel PC Mounting Bracket n/a
Nylon Thumb Screw Used w/ Panel PC Power Supply
Screw, 10-32 X 1/2“ SHCS-PATCH,
SST
Reference
FIGURE 3
Default configuration is 115V,
part comes with fuses for 230V
Used with Laser Printer, DSP
Box, Label Printer, and Panel PC
n/a
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P/N 000995 Rev.A
000862
000906
000907
000920
000921
000954
Cart, (230V) FIGURE 1, FIGURE 2
Cart Column with Peripherals FIGURE 1, FIGURE 2
Keyboard (USB) FIGURE 1
Velcro Strap FIGURE 2
Inkjet Printer Power Cord n/a
Label Printer, Seiko SLP 440 FIGURE 1
Includes spare hardware to
000962
Spare Hardware Kit
match set originally shipped with
ALGO 5 system
000972
030734
040527
040950
040951
040947
040948
700090
700138
800080
800197
900022
900028 /
900029
Lithium battery CR2032, 3V coincell
FIGURE 19
USB Cable n/a
Equipment Check Kit FIGURE 8
Page Printer-Inkjet FIGURE 1, FIGURE 2
Page Printer-Laser FIGURE 1, FIGURE 2
Barcode Scanner FIGURE 2
LAN Isolator n/a
Power Cord, US n/a
Power Cord, AU n/a
Screw, flathead phillips, 10-32X1/2 Used with DSP bracket
Screw, hex, 1/4-20X3/4” SST Used with DSP bracket
Sticky Tape, Double Back, 1” Used for Power Supplies
Used for mounting Label Printer.
Dual Lock
If Dual Lock must be replaced,
order both 900028 & 900029
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5.3. Specifications
Note: Specifications are subject to change without notice
Power Supply: Power Rating 120 V~, or 240 V~; 600VA, 50/60Hz
Nominal Dimensions: Cart 64” (163 cm) x 20” (51 cm) x 20” (51 cm) (H x W x D)
Nominal Weight: Cart 110 lbs (50 kg)
Cart fully equipped: 140 lbs (63.5 kg)
Compliance Standards:
EN60601-1
EN60601-1-2
EN60601-1-4
UL60601-1
CAN/CSA 22.2 601-1
Classifications
Electrical Safety Class 1 equipment, BF type applied part
Ordinary equipment for protecting against ingress of water
Operating Temperature: 10ºC - 35ºC (50ºF - 95ºF)
Storage Temperature: -20ºC - 40ºC ( -4ºF - 104ºF)
Humidity: 10% – 90% rel. (non-condensing)
Operating Altitude: sea level – 1800 m (6000ft)
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6. Index
A
Acoustic Test, 16
ALGO 5
Block diagram wiring, 22
Cleaning the ALGO 5, 12
Due for calibration, 21
Equipment check, 15
Front view, 7
Major Parts, 6
Pictorial introduction, 7
Precautionary Information, 6
Rear view, 8
Routine maintenance, 12
Troubleshooting the ALGO 5, 23
Artifact Test, 16
ATA 5
Calibration scheme, 16, 19, 21
Equipment check, 16
Illustration, 10
Major components, 6
Troubleshooting the ATA 5, 30
B
Baseboard Test, 16
C
Calibration dates, 16
D
DSP
Equipment check, 16
Illustration, 9
Major Parts, 7
Troubleshooting the DSP Box, 23
H
High Ambient Troubleshooting, 37
High Impedance Troubleshooting, 34
High Myogenic Troubleshooting, 35
High Refer Rate Troubleshooting, 36
I
Impedance Test, 16
Isolation Transformer
Major components, 6
Troubleshooting the ALGO 5, 23
Troubleshooting the Isolation Transformer, 28
P
Panel PC
Cleaning the Panel PC, 12
Equipment check, 15
Major components, 6
Replacing the battery, 25
Troubleshooting the Panel PC, 23
Warnings, 6
Parts list, 38
PCA 5
Equipment check, 16
Illustration, 10
Major components, 6
Troubleshooting the PCA 5, 33
Performance verification, 15
Preamp 5
Equipment check, 16
Illustration, 9
Major components, 7
Routine Maintenance Procedure, 12
Troubleshooting the Preamp 5, 31
E
Earth leakage current, 14
Enclosure leakage current, 14
G
Ground Integrity, 13
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41
S
Specifications, 40
T
Troubleshooting, 22
42 ALGO® 5 Newborn Hearing Screener Service Manual
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