Star Trac 7600 Manual Do Utilizador

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Service Manual: E-TR and E-TRi 
 
6
POWER (ELECTRICITY) 
 
Objectives 
If you are not qualified/comfortable working with electricity you should consult a certified electrician.  
This section should provide you with the information necessary to properly service your Star Trac unit 
by giving you: 
x  A basic understanding of electrical safety 
x  A basic understanding of electrical terminology 
x  A basic understanding of electricity in general 
x  A basic understanding of electrical tools 
x  An overview of your Star Trac unit 
Safety 
See the “PRECAUTIONS – SAFETY” section of this manual. 
Terminology 
 
 
 
 
 
 
 
 
CURRENT – The number of electrically charged particles that flow past a given point on a 
circuit in a given time 
AMPERE (AMP) – A measure of current 
VOLT – Measures the current pressure of a circuit 
x  Star Trac refers to the 2 most common global voltages as:  
o  110V (or 110VAC) 
o  220V (or 220VAC) 
WATT – The rate at which an electrical device consumes energy 
OHM – A measurement of resistance 
o Ohm’s Law: 
Current:
 
I = V / R
 
I = current,   V = voltage,  R = resistance
 
I  =  

 
R
 
 
Depending on what you are trying to solve, other variations can be made: 
Voltage: 
Resistance: 
V = I x R 
R = V / I 
All variations of Ohm’s Law are mathematically equal to one another. 
 
 
 
 
 
 
 
 
 
RESISTANCE – Used to dissipate passing current into heat to lower a voltage. Resistance 
is measured in Ohm’s. 
POTENTIOMETER (POT) – An electronic component which has an adjustable resistance 
HOT wire – Delivers power to the unit.  Typically has black, brown, or red insulation 
NEUTRAL wire – Once electricity has done its work, it goes back through the neutral wire 
to complete the circuit.  Typically has white or blue insulation 
GROUND wire – In addition to the neutral wire, the ground wire offers current another path 
should an electrical short happen.  Also help to dissipate static build-up from the running 
belt and other components.  Typically has green insulation (may be bare copper in some 
cases)