Power Control Board - Life Fitness 8500 Service Manual

Life Fitness Model 8500, 9100, and 9500HR Cross-Trainers
ELECTRONICS OVERVIEW - POWER CONTROL BOARD
Functional Description:
The Power Control Board is
designed to regulate the
alternator voltage by
modulating the field current. It
regulates the pass current
(RPM signal) from the
Alternator to the Console, and
the pass current from the
alternator to the load resistor
while providing supply voltage
for the console.
Connector and Pin Functions
Connector
P1 is a Molex 11 pin connector
that connects to the Console
P2 is a 12 pin connector that
connects to the Alternator and
Power Resistor
P3 is 4 pin connector (not used)
4
TP2
Connector P2
Location Pin Functional Description
1 START
2 GND
3 KEY
4 VSYS
6 LOADCMD
7 RPM
8 START
9 VBAT (6VDC)
10 GND
11 GND
1 GND
2 GND
3 GND
4 RPM
5 GND
6 FIELD
7 LOAD
8 LOAD
9 LOAD
10 VALT (10VDC)
11 VALT (10VDC)
12 LOAD
1 VSYS (7-8VDC)
2 Keyed
N/A
3 VSYS (7-8VDC)
4 GND
5 GND
Connector P3
Connector P1
TP1 TP4
TP3