Tatung VM9AF, Service Manual

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3 IMPORTANT 

SAFEGUARDS 

 
For your own safety, read all of these instructions and save them for later 
reference. 
 

3-1 POWER 

PLUG 

This display monitor is equipped with a 3-wire grounding type power plug.  
The third pin provides a safety ground for the display frame and will fit 
only into the power outlet of compatible configuration. 
 
Contact your technician to replace the obsolete outlet.  Do not defeat the 
safety purpose of the grounding plug. 
 

3-2 POWER 

INPUT 

This display should be operated only from the types of power source 
indicated on the label.  If there is any question about the type of power 
supplied to the outlet, consult your technician or dealer. 
 

3-3 VENTILATION  

Openings on the cabinet back and bottom are provided for ventilation.  To 
insure reliable operation and to protect the display from overheating, these 
openings must not be blocked or covered.  Do not place the display near or 
over a radiator or heating vent.  If this unit is installed within another 
enclosure be sure that adequate ventilation has been provided. 
 
Never push objects of any kind through the cabinet openings.  They may 
touch dangerous voltage points or cause short circuits that could result in 
fire or electrical shock. 
 

3-4 ATTACHMENTS 

Signal sources must be of approved types and properly grounded.  If safety 
standards are to be maintained ask the service technician to perform routine 
safety tests to determine that all equipment is in safe operation condition. 
 
Overloaded or poorly grounded AC power systems can cause severe 
difference in ground potential between the display and the signal source, 
particularly on long video lines where the display and the source are 
plugged into different AC power circuits.  Besides causing signal 
instability, ground potential may be great enough to present a shock hazard.  
Ground potential tests should be part of the routine safety check made by 
the service technician.