GE CARESCAPE Monitor B850, Руководство по обслуживанию

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Disassembly and reassembly
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12 Disassembly and reassembly
12.1 Disassembly guidelines
Field repair of the patient monitor is limited to replacing field replaceable units (FRUs). See
chapter
13. Service parts for a detailed list of available FRUs. Attempting a field repair on a
printed circuit board, or a factory sealed component or assembly could jeopardize the safe and
effective operation of the monitor.
NOTE: Only a qualified service technician should perform field replacement procedures.
NOTE: Perform the checkout procedure described in chapter
10. Maintenance and checkout
always after doing any disassembly of the patient monitor.
12.1.1 ESD precautions
All external connectors of the patient monitor are protected against electrostatic discharge
(ESD) damage. However during service of the patient monitor, exposed components and
assemblies inside the patient monitor are susceptible to ESD damage. Human hands, non-ESD
protected work stations or improperly grounded test equipment can cause ESD damage. The
following guidelines do not fully guarantee static-free workstation, but can greatly reduce the
potential for failure of any electronic assemblies being serviced:
•
Discharge any static charge you may have built up before handling semiconductors or
assemblies containing semiconductors.
• A grounded, antistatic wristband or heel strap should be worn at all times while handling
or repairing assemblies containing semiconductors.
• Use properly grounded test equipment.
• Use a static-free work surface while handling or working on assemblies containing
semiconductors.
• Semiconductors and electronic assemblies should be stored only in antistatic bags or
boxes.
• Handle all PCB assemblies by their edges.
• Do not remove semiconductors or assemblies containing semiconductors from antistatic
containers until absolutely necessary.
• Do not slide semiconductors or electrical/electronic assemblies across any surface.
• Do not touch semiconductor leads unless absolutely necessary.
• Do not flex or twist a circuit board.
WARNING Pins of connectors identified with the ESD warning symbol should not be
touched. Connections should not be made to these connectors unless
electrostatic discharge (ESD) precautions are used.
12.1.2 Reassembly precautions
Pay attention to the following precautions when reassembling the monitor:
•
Note the positions of any wires, cables or connectors. Mark them, if necessary, to ensure
their correct reassembly.
• Save and set aside all hardware for reassembly.