Spindle Encoder 
Tests the encoder wheel attached to the spindle. Visual controls that are available 
are “zoom,” “pan left,” and “pan right.” Close hood and select “Take Readings” to 
initialize test. 
Keys and Switches 
Tests keypad and switches. Each working keypad and switch will beep upon closure 
to verify that it is in working order. This will include all switches, such as the inflation 
station, hood open/close, etc. 
Data Acquisition Circuits  
Tests Data Acquisition Circuits. Screen displays real-time samples as acquired by 
main PC Board electronics of all circuits. 
Dataset Arm Sensors 
Tests inner and outer dataset arms. Install wheel, apply dataset arms, and press the 
outer dataset arm switch to initialize the test. The tests measures both the lateral and 
radial data from the inner and outer dataset arms. 
Loaded Runout Sensor 
Tests the sensor mounted on the load roller. Visual controls that are available are 
“zoom,” “pan left,” and “pan right.” 
Lateral Force Sensor 
Tests the lateral forces on the spindle for both clockwise and counter clockwise 
movement. Visual controls that are available are “zoom,” “pan left,” and “pan right.” 
6.3 Diagnostic Procedures (Service Mode Enabled) 
Loaded Runout Air Components (Service Mode Only) 
Measures forces exhibited by the air bag and inflation station. Install a wheel 
assembly, close the hood, and select the desired option from the menu. 
Motor Drive (Service Mode Only) 
Tests rpm’s and torque of the motor drive compared to the exact rpm or load setting. 
The rpm setting can be manually adjusted from this screen using the control knob. 
Tests on the motor drive can be focused on speed control or torque control. Close 
hood and push the “Start” button to begin the test. 
6.4 Cleaning the Console 
When cleaning the console, use window cleaning solution to wipe off the display 
console and cabinet. Do not spray window cleaning solution directly onto control 
panel or LCD. Power should be “OFF” prior to cleaning the LCD. 
 WARNING:  Exposing the balancer to water either by hose, bucket, 
or weather may cause risk of electrical shock to 
operator or bystanders and will damage the electrical 
system. Place, store, and operate the balancer only in a 
dry, sheltered location. 
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 Calibration and Maintenance  GSP9720JLR Wheel Balancer Operation Instructions