Service Manual

68 Pages

Table of Contents  Contents  Page No.  1. General Information...4 1.1 1.2 1.3 1.4 1.5  Introduction...4 Servicing Policy...4 Description...4 Antistatic Handling...5 Construction...5  2. Safety Aspects...6 2.1 2.2 2.3 2.4  Safety...6 Maintenance...6 Cautions...6 General Care And Cleaning...7  3. Specifications...8 3.1 3.2 3.3 3.4 3.5 3.6 3.7  Safety...8 Power Supply...8 Enclosure...8 Controls and Indicators...8 Auto Shut Off...9 Outputs...10 Probes...10  4. Technical Description...11 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 4.18 4.19  The Doppler Principle...11 Doppler Audio Processing...11 Fetal Heart Rate Processing, (FD2-P, MD2-P, FD1-P, FD3-P)...11 Bi-directional Signal Processing (MD2-P, SD2-P, RD2)...11 Probe Identification...12 Active Noise Reduction...12 Intelligent Auto Shut Off (FD2-P, SD2-P, MD2-P, FD1-P, FD3-P, RD2)...12 Calibration Pulses...12 Waveform Conversion...12 PPG...13 Data Output...13 Microcontroller...13 Standard/Smoothed Mode FHR...13 Manual Mode FHR...13 Audio Dopplex (D920-P, D930-P), Mini Dopplex (D900-P)...14 FD2-P, SD2-P, MD2-P, FD1-P, FD3-P, RD2...16 Obstetric Probe (OP2HS, OP3HS, D920-P, D930-P, FD1-P, FD3-P)...19 Vascular Probe (VP4HS, VP5HS, VP8HS, VP10HS, EZ8)...20 PPG Probe...21  5. Electrostatic Discharge (ESD) Precaution...23 5.1 5.2  What Is Static Electricity?...23 Protective Measures...23  6. Servicing Procedures - Control Unit...24 6.1 6.2 6.3 6.4  Control Unit Dismantling Procedure...24 PCB Removal...25 Changing Components...25 Control Unit Reassembly...26  7. Probe Head Replacement Procedure...30 7.1 7.2  2  7.3 7.4a 7.4b 7.5 7.6 7.7a 7.7b 7.8  Equipment Required...30 Preparation - For High Sensitivity Probes... (OP2HS,OP3HS,VP4HS,VP5HS,VP8HS,VP10HS,EZ8)...30 Dismantling Procedure - All Probes except D920-P, D930-P, FD1-P & FD3-P...31 Dismantling Procedure - D920-P, D930-P & FD1-P...31 Dismantling Procedure - D920-P, D930-P, FD1-P & FD3-P...32 New Head Fitting and Alignment...33 Reassembly Procedure - All Probes except D920-P, D930-P, FD1-P & FD3-P...36 Reassembly Procedure - D920-P, D930-P & FD1-P...37 Reassembly Procedure - D920-P, D930-P, FD1-P & FD3-P...39 Waterproof Inspection & Test Procedure - D920-P, D930-P, FD1-P & FD3-P...41
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File Size: 2.75 MB
File Name: Pocket Dopplers Service Manual 726374-8.pdf

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