service menu. The console also controls and sends the ASL
1
status state (based on the
received error codes) to the base.
The LPCA makes use of two main processors: the Master (also referred to interchangeably as
“Major”) and Slave (also as “Minor”).
Base - Lower PCA board (LPCA)
The base Lower PCA
2
(LPCA
3
) receives machine control commands from the console and
directly executes the commands to control the braking, lift operation, and power ON/OFF. The
LPCA also monitors error conditions and sends the detected error event code information to
the console.
The LPCA makes use of two main processors: the Master (also referred to interchangeably as
“Major”) and Slave (also as “Minor”).
COMM Communication Interface Cable
1
Active Status Light: Service and maintenance status light.
2
Printed circuit assembly, generally referred to as either an upper PCA or lower PCA.
3
Lower printed circuit assembly; generally this refers to the lower board. On treadmills, this is
the motor controller unit (MCU), and on self-powered units, it is the main board in the lower
section.
Contact Precor Customer Support at support@precor.com or 800.786.8404 with
any questions.
Page 217
9 Theory of Operation
Console Upper PCA and Base Lower PCA Operation
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