Technogym BIOSTRENGTH LINE, Service Maintenance Manual

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BIOSTRENGTH LINE: Service & Maintenance manual - rev. 2.1
Page 3.26
3.5.3. T
HE SIGNALS INVOLVED
The machine controls the seat position via the CPU board, the Bio servo board, the LP driver board
and the seat motor as shown in the figure below:
The following signals come into play:
•
Motor up signal on (
↑↑↑↑
)
This is the signal generated by the CPU (pin 4-2 on connector K4) to enable the seat motor to
move the seat forward (up). This signal enters the LP driver board (pins 2-6 on connector CN3),
and is processed by the latter to pilot the seat motor with the proper supply voltage.
The control logic states that when the motor up signal is low (~ 0 V) the motor is stopped and
thus not powered (0 Vdc), while when the signal is high (~ 4 V) the motor moves because it is
LP driver board
↓
Bio servo board
Photocell
↑ Alarm Pulses
Motor
2-6/CN6
3-6/CN6 4-6/CN6 5-6/CN6
2-6/CN3 3-6/CN3 4-6/CN3 5-6/CN3
1-2/CN1 1-3-5/CN4
Pulses
Limit
switch
2-4-6/CN4
↓
CPU board
↑ Alarm Pulses
4-2/K4
6-2/K4 8-2/K4 10-2/K4
4-2/CN7 6-2/CN7 8-2/CN7 10-2/CN7