Datascope Passport - Mindray

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Theory of Operation Patient Connector Board AAMI 2.5 Patient Connector Board AAMI The ECM Patient Connector board is intended for use with cables having integral 1k resistors, which eliminate the possibility of harmful arc-over at the connector pins during defibrillation. 2.5.1 Spark Gap Suppressor 2.5.2 Neon Bulbs The patient cable is attached to the patient connector board. The clamping of defibrillator transients, consisting of a neon bulb with each electrode circuit which clamps the peak voltage with respect to isolated ground in series with the coupling capacitors. The cable resistors absorb the remaining defibrillator voltage. This board provides defibrillator overload protection in conjunction with the front-end board. The neon bulbs has a breakdown voltage range 60 v to 75 Volts. The patient’s ECG and Respiration signals pass through the neon bulbs, which suppresses the defibrillation pulses. 2.5.3 Low-Pass Filter The patient cable is attached to the patient connector board. The ECG signal and the respiration signal pass through the AAMI connector J1. This board contains 3 LC Low -Pass Filters with a minimum roll-off frequency of 17 MHz. A cut-off frequency of 23 MHz (-3dB) 2.5.4 EMI Suppressor The temperature probe connects to a three-circuit phone jack connector on the Patient Connector board. The temperature circuit provides high-precision measurements of the thermistor resistance, while using a minimum of precise components. This module also features electrosurgical interference suppression (ESIS) and EMI suppression. The Connector cable is used to reduce Conducted Susceptibility and Radiated Susceptibility induced by the high frequency fields. The module serves simply as a connector; the signals pass through efficiently and with minimum loss. 2.5.5 Patient and Power Isolation This power supply requires sufficient isolation between the input and output to withstand the voltage of a defibrillator, up to 2.5 kVrms. Further, it requires low capacitance between the input and output, to minimize leakage currents which may flow should the patient accidentally contact line voltage. The patient’s signals in the Patient Connector board must be isolated to the same degree as the power supply and the ground. 2.5.6 Provide mating for ECG, Temperature and two IBP connectors The patient cable is attached to the monitor at the Patient Connector board. From the connector board, the signal flows to the Front-End module, where the bulk of the ECG processing is performed the transducers are plugged into the monitor via the Patient Connector board. The Connector board bridges the excitation and ground of the transducers together, then passes the signals to the main board. Passport 2®/Passport 2 LT Service Manual 0070-10-0441 2 - 29
Patient Connector Board AAMI Theory of Operation 2.5.7 0670-00-0682-01 This module is responsible for acquisition of most of the patient-safety-isolated signals, namely the ECG, Temperature and two channels of Invasive Blood Pressure connectors IBP1 and IBP2. The Connector board collects all of the individual patient cables into a single ribbon cable, then passes the signals to the main board. 2.5.8 0670-00-0682-02 This module is responsible for acquisition of the patient-safety signals, namely the ECG and the Temperature. This module is without the dual 6 pin connectors for the IBP. The Connector board collects all of the individual patient cables into a single ribbon cable, then passes the signals to the main board. 2 - 30 0070-10-0441 Passport 2®/Passport 2 LT Service Manual
Page 1 and 2: Datascope Passport® Datascope Pass
Page 3 and 4: FilterLine ® is a U.S. registered
Page 5 and 6: Table of Contents Respiration .....
Page 7 and 8: Table of Contents Calibration Proce
Page 9 and 10: Introduction Warning This page inte
Page 11 and 12: Controls, Indicators And Connectors
Page 13 and 14: CPU Control Module Theory of Operat
Page 23 and 24: Front End Module Theory of Operatio
Page 33 and 34: NIBP Module (P/N 0997-00-0501) Theo
Page 39: NIBP Module (P/N 0997-00-0501) Theo
Page 43 and 44: Patient Connector Board H.P. Theory
Page 45 and 46: XE-50 Recorder Interface Board Theo
Page 47 and 48: Power Supply Theory of Operation 2.
Page 49 and 50: Power Supply Theory of Operation Th
Page 51 and 52: El Display Interface Board Theory o
Page 53 and 54: Passport 2 Passive Display/Keypad I
Page 55 and 56: NEC 10.4” Display/Keypad Interfac
Page 57 and 58: Passport 2 NIBP Module (P/N 0670-00
Page 65 and 66: SpO 2 Interface Board (Nellcor, Nel
Page 67 and 68: SpO 2 UART Serial Interface Theory
Page 69 and 70: Safety Precautions Repair Informati
Page 75 and 76: Disassembly Instructions Repair Inf
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Disassembly Instructions Repair Inf
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12 Lead Card and Cable Assembly P/N
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6A 6B 8 59 56 58 54 NEC TFT LCD Dis
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6A 6B START KEYPAD INSTALLATION AT
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Parts List Front Housing Replacemen
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Parts List Rear Housing Replacement
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Communication Ports Parts List Repl
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Calibration Introduction Calibratio
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Diagnostics Calibration Procedure 6
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Verification Calibration Procedure
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Preventive Maintenance Schedule Pre
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Sterilization and Cleaning of Reusa
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How to Get Help Preventive Maintena
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References Preventive Maintenance S
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Warranty Preventive Maintenance 7.1
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Printed in U.S.A. 0070-10-0441 Rev
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Datascope Passport - Mindray

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