IBM RT-686 User Manual

7 

A clean and moisture-free environment is preferred. Make room for air circulation. 
Avoid areas with: 

•

  Sudden or extreme changes in temperature. 

•

  Extreme heat. 

•

  Strong electromagnetic fields (near television set, motor rotation area, etc.). 

•

  Dust or high humidity. 

However, if it is necessary to work in a hostile environment, please regularly 
maintain your computer by cleaning dust, water, etc. to keep it under optimal 
condition. 

The computer is designed with rugged features such as vibration, shock, dust, and 
rain/water protection. However, there is NO WARRANTY for such features. 
Please provide appropriate protection while operating in harsh environments. 

The computer designed to withstand rainfall from top with mild wind blowing 
only. Please keep the keyboard facing up, i.e., normal operating direction, to 
maintain water resistance. NEVER immerse the computer into water or spray 
water with the system up side down. It may cause permanent damage. 

The D-sub connector caps on the rear of the computer are for dust and shock 
protection. The connectors are sealed internally. Other I/O ports and devices on 
the left or right must have caps tightly closed or cable inlets sealed while exposed 
to water or dust. 

There are optional gaskets for DB-9 and DB-25 connectors. You may install them 
to improve rain/dust/moisture resistance on your commercial type cable. Insert 
the packing into the male connector (with pins) and fasten the screws. 

All connectors will corrupt if exposed to water or moisture. They corrupt 
even faster if the power is ON. Please take proper water-resistant measures 
for cable connections. 

The DC jack and cable are sealed which may operate with water splashing while 
attached. All rubber caps should be closed when there is no cable attached.