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BCI® 3304 Oximeter
Service Manual
98
B
% SpO2
PULSE
VOLUME
SILENCE
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ALARM
ARTIFACT
VOLUME
98
B
% SpO2
L
Catalog Number 1858
Version 7, April 2008
© 2008 Smiths Medical family of companies. All rights reserved.
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- English
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Related Manuals for Smiths Medical BCI 3304
Summary of Contents for Smiths Medical BCI 3304
- Page 1 ALARM PULSE SELECT VOLUME SILENCE LO BATT ALARM ALARM ARTIFACT SEARCH SENSOR VOLUME CLEAR % SpO2 b p m SENSOR - English Catalog Number 1858 Version 7, April 2008 © 2008 Smiths Medical family of companies. All rights reserved.
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Page 3: Table Of Contents
Table of Contents Table of Contents Revision History ..............v Warranty & Service Information ........vii Proprietary Notice ....................vii Warranty ......................... vii Limited Warranty ..................vii Disclaimer of Warranties ................viii Conditions of Warranty ................viii Limitation of Remedies ................viii Warranty Procedure ..................ix CE Notice ........................ix Chapter 1: Introduction .......... - Page 4 Table of Contents Input buffer ....................2-4 Synchronous Serial Port ................2-4 Asynchronous Serial Port ................2-4 RS-232 Isolation Interface ...............2-4 A/D Converter ......................2-5 LED Drive .......................2-5 Signal Processing ....................2-6 Display Board .......................2-6 Signal Dictionary ....................2-7 Oximeter Board ..................2-7 Display Board ....................2-10 Test Equipment and Tools Required ............
- Page 5 Table of Contents The product described is covered by one or more of the following: U.S. Patent No. 5,615,091 and 5,558,096. BCI and the Smiths design mark are trademarks of the Smiths Medical ® family of companies. The symbol indicates the trademark is registered in the U.S.
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Page 7: Revision History
RevISIOn DATe Rev.7 April, 2008 CHAngeS • Added design frame, BCI lozenge and Smiths Medical logo to front cover. Deleted Smiths Medical logo from back cover. • Added the Smiths design mark to trademark statement. • Updated Warranty section. •... - Page 8 Revision History This page is intentionally left blank. 3304 Service Manual...
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Page 9: Warranty & Service Information
Information contained in this document is copyrighted by Smiths Medical PM, Inc. and may not be duplicated in full or part by any person without prior written approval of Smiths Medical PM, Inc. Its purpose is to provide the user with adequately detailed documentation to efficiently install, operate, maintain and order spare parts for the device supplied. -
Page 10: Disclaimer Of Warranties
Warranty & Service Information Disclaimer of Warranties THe FORegOIng eXPReSS WARRAnTY, AS COnDITIOneD AnD LIMITeD, IS In LIeU OF AnD eXCLUDeS ALL OTHeR WARRAnTIeS WHeTHeR eXPReSS OR IMPLIeD, BY OPeRATIOn OF LAW OR OTHeRWISe, InCLUDIng BUT nOT LIMITeD TO, AnY IMPLIeD WARRAnTIeS OF MeRCHAnTABILITY OR FITneSS FOR A PARTICULAR PURPOSe. -
Page 11: Warranty Procedure
Box and inserts should be in original condition. If original shipping material in good condition is not available, it should be purchased from Smiths Medical PM, Inc. Damages occurred in transit in other than original shipping containers are the responsibility of the shipper. All costs incurred returning devices for repair are the responsibility of the shipper. - Page 12 Warranty & Service Information This page is intentionally left blank. 3304 Service Manual...
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Page 13: Chapter 1: Introduction
Chapter 1: Introduction Chapter 1: Introduction About this Manual This manual contains circuit descriptions, voltage and waveform test points, detailed parts lists, and circuit diagrams for the oximeter. It is intended for persons trained in service, maintenance, and repair of modern medical equipment. - Page 14 If purchased before that date, they may also be sent for Separately recycling if being replaced on a one-for-one, like-for-like basis (this varies depending on the country). Recycling instructions to customers using Smiths Medical products are published on the internet at: http://www.smiths-medical.com/recycle 3304 Service Manual...
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Page 15: Warnings
Chapter 1: Introduction SYMBOL DeFInITIOn Disposal (other countries) When disposing of this device, its batteries or any of its accessories, ensure that any negative impact on the environment is minimized. Contact your local waste disposal service and use local recycling or disposal schemes. Separate any other parts of the equipment where arrangements can be made for their recovery;... - Page 16 Failure to comply may compromise patient isolation. WARnIng! Patient safety can be compromised by the use of a power supply not supplied by Smiths Medical PM, Inc. Use only the power supply included with your monitor, or approved by Smiths Medical PM, Inc.
- Page 17 Chapter 1: Introduction WARnIng! SpO measurements may be adversely affected in the presence of high ambient light. Shield the sensor area (with a surgical towel, for example) if necessary. WARnIng! Dyes introduced into the bloodstream, such as methylene blue, indocyanine green, indigo carmine, fluorescein, and patent blue v (PBv) may adversely affect the accuracy of the SpO reading.
- Page 18 Chapter 1: Introduction WARnIng! When connecting this monitor to any instrument, verify proper operation before clinical use. Refer to the instrument’s user manual for full instructions. Accessory equipment connected to the monitor’s data interface must be certified according to the respective IeC standards, i.e., IeC 60950 for data processing equipment or IeC 601-1 for electromedical equipment.
- Page 19 Chapter 1: Introduction WARnIng! Do not place the monitor in the patient’s bed or crib. Do not place the monitor on the floor. WARnIng! Failure to place the monitor away from the patient may allow the patient to turn off, reset, or damage the monitor, possibly resulting in the patient not being monitored.
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Page 20: Cautions
Chapter 1: Introduction Cautions CAUTIOn! The monitor is equipped with an internal rechargeable battery. Do not attempt to remove or replace the internal rechargeable battery. Refer servicing to an authorized repair center. CAUTIOn! Failure to charge the monitor while the monitor is not being used may shorten the battery life. -
Page 21: Chapter 2: Oximeter Circuit Description
Chapter 2: Oximeter Circuit Description Chapter 2: Oximeter Circuit Description Functional Structure The functional structure of the oximeter is shown in drawing no. 71200S1. The oximeter consists of the main board, the display board, two key labels, speaker, probe connector assembly and the battery: •... -
Page 22: Oximeter On/Off Control
Chapter 2: Oximeter Circuit Description Oximeter On/Off Control When the oximeter is off and the O/I key is pressed U19-5 is shorted to ground, which causes flip-flop output U19-3 to go low and turn Q7 off releasing U25 from the shut down mode. There are two ways the oximeter can be turned off: •... -
Page 23: Reset Circuit
Chapter 2: Oximeter Circuit Description Reset Circuit Watchdog timer chip U15 performs two functions: • /RESET is generated by U15 if VCC is less than +4.4 VDC. • /PFO (power fail output) is generated by U15 if the input PFI at U15-4 becomes less than 1.25 VDC. -
Page 24: Interface Circuit
Chapter 2: Oximeter Circuit Description Interface Circuit Addressable Latch and Speaker Output Addressable latch U21 and U22 decodes A0-A7 and provides 16 outputs for controlling the oximeter board’s circuitry. Four outputs, pins 5, 6, 7 and 9 of U22 create a 16 step D/A converter which defines the speaker volume. -
Page 25: A/D Converter
Chapter 2: Oximeter Circuit Description A/D Converter A/D converter (ADC) U8 is configured as a two channel 16-bit ADC. The first channel is used by the signal processing circuitry. The second channel is used to read battery voltage. The ADC’s reference voltage input of 3.78VDC is formed by the filter-amplifier U4B. -
Page 26: Signal Processing
Chapter 2: Oximeter Circuit Description Signal Processing The differential transconductance amplifier formed by U1 and U2B converts the photodetector’s current output to a voltage at TP10 (V-AMB). Amplifier U3B offsets the signal at TP10 so the signal baseline is at 3.4 VDC, allowing a wider signal range for the negative-going pulses at TP10. -
Page 27: Signal Dictionary
Chapter 2: Oximeter Circuit Description Signal Dictionary This section lists in alphabetical order the signal names used on the schematics. The signal’s origin, destination, and purpose are described. Oximeter Board SIgnAL DeSCRIPTIOn /ADCRST Reset signal to ADC. /AMB Signal informing microprocessor about excess of ambient light. /BLANK Signal used to shut down power supply and display board during data acquisitions. - Page 28 Chapter 2: Oximeter Circuit Description SIgnAL DeSCRIPTIOn ANA-5 The -5 volt power supply is filtered to produce ANA-5. ANA-5 powers the analog circuitry. BP/UP ADC bipolar or unipolar conversion mode selection signal. CAP-GND Signal used to short blocking capacitor C19 to ground. CH1/2 ADC channel one or two selection signal.
- Page 29 Chapter 2: Oximeter Circuit Description SIgnAL DeSCRIPTIOn STBY Input signal indicating that I/O key was pressed. TXA0, Asynchronous serial communication signals used to control RXA0 external optional printer. TXA1, Asynchronous serial communication signals used for production RXA1 testing. TXS is the microprocessor’s high-speed, synchronous serial output transmitted data signal.
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Page 30: Display Board
Chapter 2: Oximeter Circuit Description Display Board SIgnAL DeSCRIPTIOn /BLANK Same as oximeter board /BLANK. Ba-Bd Ba-Bd originate at display driver U2 and are routed to the bar displays. The state of Ba through Bd determine which display or bar graph segments light when the corresponding DIG signal is strobed. -
Page 31: Voltage Test Points
Chapter 2: Oximeter Circuit Description voltage Test Points Unless otherwise noted, all voltages are measured with respect to ground at TP-1. LOCATIOn COnDITIOn nOMInAL AnD RAnge Oximeter on. 5 VDC, ± 0.25 VDC ANA+5 Same as TP2. Same as TP2. FLTR+5 Same as TP2. - Page 32 Chapter 2: Oximeter Circuit Description TP16: TP15: A = 0.2 V TB = 0.4 ms A = 1 V TB = 0.4 ms TP10: TP11: A = 1 V TB = 0.4 ms A = 1 V TB = 0.4 ms TP12: A = 1 V TB = 0.4 ms...
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Page 33: Appendix
Appendix Appendix Parts Lists # OF nUMBeR DeSCRIPTIOn ITeM PAgeS 71200A1 F/ASM Oximeter BOM 71200A1 F/ASM Drawing 71200S1 F/ASM Schematic 71204B1 PWB ASM. Main Bd. 71204B1 PWB ASM Main Bd. Parts List 71204S1 PWB ASM Main Bd. Schematic 71206B1 PWB ASM Display 71206B1 PWB ASM Display Parts List 71206S1... - Page 34 Appendix This page is intentionally left blank. App-2 3304 Service Manual...
- Page 36 Phone: (44) 1923 246434 Colonial Way, Watford, Herts, Fax: (44) 1923 240273 WD24 4LG, UK Australian Representative: Smiths Medical Australasia Pty. Ltd. Tel: +61 (0) 7 3340 1300 61 Brandl Street, Eight Mile Plains, QLD 4113, Australia Manufactured By Smiths Medical PM, Inc.
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