GE HEALTHCARE E-PRESTN, Техническое руководство

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Module Frames and Modules
6 - 12
2062973-004
6 Disassembly and reassembly
6.1 Disassembly guidelines
Field service of the module is limited to replacing faulty circuit boards or mechanical parts only
(see chapter
7. Service parts for details).
WARNING Attempting a field repair on a PCB or a factory sealed component or
assembly could jeopardize the safe and effective operation of the module,
and void the warranty.
NOTE: Only a qualified service technician should perform field replacement procedures.
NOTE: Perform the checkout procedure described in chapter
3. Maintenance and checkout
after you have disassembled and reassembled the module.
6.1.1 ESD precautions
All external connectors of the module are designed with protection from ESD damage.
However, if the module requires service, exposed components and assemblies inside are
susceptible to ESD damage. This includes human hands, non-ESD protected work stations or
improperly grounded test equipment. The following guidelines may not guarantee a 100%
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.
•
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.
•
Semiconductors and electronic assemblies should be stored only in antistatic bags or
boxes.
•
Handle all PCB assemblies by their edges.
•
Do not flex or twist a circuit board.
6.1.2 Before disassembly
•
Note the positions of any wires or cables. Mark them if necessary to ensure that they are
re-assembled correctly.
•
Save and set aside all hardware for reassembly.