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ITC HEMOCHRON Jr. Signature Service Manual

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SERVICE MANUAL

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Summary of Contents for ITC HEMOCHRON Jr. Signature

  • Page 1 SERVICE MANUAL...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Introduction ........1.0 Precautions .

  • Page 3: Introduction

    The specialized test equipment is only available at ITC repair facilities. This manual describes the following procedures: •...

  • Page 4: Precautions

    2.0 Precautions Safety precautions that are necessary when servicing the HEMOCHRON ® Jr. Signature microcoagulation instrument are summarized below. It is important that these precautions be carefully read and understood. WARNING: POTENTIAL BIOHAZARDOUS MATERIAL - Samples that are analyzed by the HEMOCHRON ®...

  • Page 5: Replacement Parts List

    3.0 Replacement Parts List HJ6003X ..........Pump Assembly HJ6011X .

  • Page 6: Troubleshooting

    If message persists, a pump 8.5, 9.0, 10.0 time period. May occur if may need to be changed. sample is added before Contact ITC Technical Service. pump-priming sequence is complete. DOES NOT ACCEPT Key switch is not functional. Remove and replace 6.3, 7.1, 9.0, 10.0...

  • Page 7: Diagnostic Procedures

    6.0 Diagnostic Procedures 6.1 Check Instrument Batteries Pack (HJ6011X) and Fuses Check the batteries and fuses by determining if the HEMOCHRON Jr. Signature ® microcoagulation instrument automatically starts when a cuvette is inserted. For this test, you will need an unused test cuvette. Procedure: 6.1.1 Before this test, the instrument should be charged for one hour by connecting it to the AC Adapter.
  • Page 8 6.2.4 If an error message is displayed, remove the test cuvette and examine the sample and waste channels. Verify that the waste channel has sample travel that is approximately 75% of the distance between the reservoir and the other end of the cuvette. Also verify that the sample channel contains a sample segment that is approximately one inch long.
  • Page 9 Note: The circuit board connectors do not have to be removed unless the circuit board must be replaced, except in the case where it is necessary to remove the connectors associated with the LED Harness Assembly. Circuit board replacement can only be done by ITC or authorized repair facility. HEMOCHRON ®...

  • Page 10: Disassembly Procedures

    8.1.2 Measure the resistance across fuse F1 and fuse F2 to verify that neither is blown. If the resistance across a fuse is greater than 100 ohms, arrange to have the instrument returned and have ITC service personnel replace the circuit board and to have the time and date reset.
  • Page 11 Procedure: 8.4.1 Remove the mounting brackets (Figure 8.4.2 Disconnect the motor connector from the circuit board. 8.4.3 Disconnect the pump tube from the fitting. 8.4.4 Lift the motor and pump assembly from the housing. Warning: Do not disassemble the cuvette housing, as it is factory set. 8.4.5 Obtain the new pump assembly and place it in the instrument base.

  • Page 12: Reassembly

    9.0 REASSEMBLY The procedure for reassembling the HEMOCHRON ® Jr. Signature microcoagulation instrument is described below. 9.1 Verify Mounting and Connection of Components Procedure: 9.1.1 Check that the battery is secured. See Figure 9.1.2 Check that the pump assemblies are properly mounted. See Figure 9.1.3 Check that the pump mounting brackets are secured.

  • Page 13: System Verification

    9.5.4 Press the Start button. 9.5.5 Enter the time using the numerical keypad. The time must be entered as four characters using a 24-hour time format. For example, enter 0930 for 9:30 AM and enter 1730 for 5:30 PM. 9.5.6 Press the Enter button. The message DATE xx.yy.zzzz is displayed. 9.5.7 Enter the date using the numerical keypad.
  • Page 14 If results on the replicates are not within the Acceptable Range labeling for the whole blood quality control material, verify the system temperature as outlined in the HEMOCHRON Jr. Signature microcoagulation instrument Operator’s Manual. If ® results are still unacceptable, contact ITC for assistance. HEMOCHRON ® Jr. Signature Service Manual...

  • Page 15: Figures

    11.0 FIGURES HEMOCHRON ® Jr. Signature Service Manual...
  • Page 16 FIGURE 1 HEMOCHRON ® Jr. Signature Service Manual...
  • Page 17 RETENTION SCREWS CUVETTE HOUSING MOUNTING SCREWS FIGURE 2 HEMOCHRON ® Jr. Signature Service Manual...
  • Page 18 BATTERY LEAD CONNECTOR TUBE FITTINGS LED HARNESS ASSY CONNECTOR FIGURE 3 MOTOR CONNECTOR FUSES (WASTE) F1&F2 MOTOR CONNECTOR (SAMPLE) HEMOCHRON ® Jr. Signature Service Manual...
  • Page 19 FIGURE 4 CONNECTOR HEMOCHRON ® Jr. Signature Service Manual...
  • Page 20 BATTERY MOUNTING SCREWS WASTE PUMP ASSEMBLIES SAMPLE MOUNTING FIGURE 5 BRACKET SCREWS HEMOCHRON ® Jr. Signature Service Manual...
  • Page 21 FIGURE 6- LED HARNESS PCB MOUNTING SCREWS HEMOCHRON ® Jr. Signature Service Manual...
  • Page 22 AC/DC KEYPAD UPPER BATTERY PACK POWER SHELL ASSY ASSY HJ6011X ADAPTER (SEE SECTION 3) CUVETTE HOUSING CUVETTE SWITCH HEATER IR LED DETECTOR FA5059X PRINTED CIRCUIT BOARD ASSEMBLY SAMPLE MOTOR PUMP ASSY HJ6003X WASTE MOTOR PUMP ASSY HJ6003X RJ45 CONNECTOR PRINTER COMPORT COMPUTER FIGURE 7- FUNCTIONAL SCHEMATIC...
  • Page 23 HEMOCHRON ® Jr. Signature Service Manual...
  • Page 24 HEMOCHRON is a registered trademark of ITC. ® HJ7430 1/03...

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