ITC HEMOCHRON Jr. Signature, Service Manual

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1.0 Introduction
The portable, battery-powered HEMOCHRON ® Jr. Signature is a microcoagulation instrument
designed to perform whole blood coagulation tests using fresh whole blood at the patient’s
bedside. The instrument is manufactured and quality assured using rigorous standards to
evaluate and certify each machine.
Under routine operating conditions, the HEMOCHRON
® Jr. Signature micro-coagulation
instrument will provide uninterrupted trouble-free service. In the event that service is
required, the HEMOCHRON
®
Jr. Signature microcoagulation instrument can be readily
disassembled and reassembled with certain easily replaceable components where necessary.
Note that this manual is limited only to the diagnostics and replacement of the battery, pump,
LED harness assembly and the membrane switch panel. For a complete listing of hazard
and fault messages reference the Operator’s Manual. This manual does not cover the
diagnostics or replacement of the printed circuit board assembly or cuvette housing due to
the requirement of specialized test equipment for calibration purposes. The specialized test
equipment is only available at ITC repair facilities.
This manual describes the following procedures:
• Certain fault messages and conditions that can be encountered are listed along
with a description of the cause and the manner in which it can be resolved.
• Diagnostic procedures to determine whether service is required and, if it is, what
type of service is required
• Details for disassembling the instrument and replacing certain key components
• Details for reassembling the instrument
• Testing procedures to verify that the HEMOCHRON
® Jr. Signature
microcoagulation instrument can be returned to routine use
HEMOCHRON ® Jr. Signature Service Manual 3