Xerox 4400DT Service Manual - Page 7
Electrostatic Discharge (ESD) Precautions, include Integrated Circuits ICs - phaser
![]() |
View all Xerox 4400DT manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 7 highlights
Electrostatic Discharge (ESD) Precautions Some semiconductor components, and the respective sub-assemblies that contain them, are vulnerable to damage by Electrostatic discharge (ESD). These components include Integrated Circuits (ICs), Large-Scale Integrated circuits (LSIs), field-effect transistors and other semiconductor chip components. The following techniques will reduce the occurrence of component damage caused by static electricity. Caution: Be sure the power is off to the chassis or circuit board, and observe all other safety precautions. I Immediately before handling any semiconductor components assemblies, drain the electrostatic charge from your body. This can be accomplished by touching an earth ground source or by wearing a wrist strap device connected to an earth ground source. Wearing a wrist strap will also prevent accumulation of additional bodily static charges. (Be sure to remove the wrist strap before applying power to the unit under test to avoid potential shock.) I After removing a static sensitive assembly from its anti-static bag, place it on a grounded conductive surface. If the anti-static bag is conductive, you may ground the bag and use it as a conductive surface. I Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage some devices. I Do not remove a replacement component or electrical sub-assembly from its protective package until you are ready to install it. I Immediately before removing the protective material from the leads of a replacement device, touch the protective material to the chassis or circuit assembly into which the device will be installed. I Minimize body motions when handling unpackaged replacement devices. Motion such as your clothes brushing together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an electro-statically sensitive device I Handle ICs and EPROM's carefully to avoid bending pins. I Pay attention to the direction of parts when mounting or inserting them on Printed Circuit Boards (PCB's). vi Phaser 4400 Laser Printer Service Manual
![](/manual_guide/products/xerox-4400dt-service-manual-3b9e87c/7.png)