Service manual

Revision D

4-1

Series 2000 Treadmill

409110-004

Troubleshooting

Power PCB Theory ....................................................................... 3

General Description ................................................................................ 3

Power Distribution/Isolation .................................................................. 3

STOP Circuitry ....................................................................................... 3

Frequency-to-Voltage Converter/Amplifier ............................................. 3

Start/Stop Circuitry ................................................................................ 4

Elevation Relays ..................................................................................... 4

Drive Connector ..................................................................................... 4

Hall Feedback ......................................................................................... 4

Power Inlet, Drive Power Outlet, and Mains ........................................... 4

Control Board Connector ....................................................................... 4

Elevation Sensor .................................................................................... 5

Isolation Transformer ............................................................................ 5

Power Supplies ...................................................................................... 5

Isolated Serial Link ................................................................................. 5

Debug/Serial Link ................................................................................... 5

ESD and EMI Compatibility .................................................................... 6

Power Supply Requirements .................................................................. 6

Precautions .......................................................................................... 12

Initial Board Conditions ........................................................................ 12

Control PCB Theory .................................................................... 13

General Description .............................................................................. 13

Power Distribution ............................................................................... 13

Clock Generator ................................................................................... 13

Reset Generator ................................................................................... 13

Temperature Sensor ............................................................................ 14

Processor Circuitry .............................................................................. 14

Analog Inputs ....................................................................................... 14

Speaker Output .................................................................................... 14

Analog Outputs .................................................................................... 15

Analog Supplies ................................................................................... 15

Supplies ............................................................................................... 15

ESD and EMI Compatibility .................................................................. 15

Brushless DC Drive Theory ........................................................... 16

General Description .............................................................................. 16

Phases and Power Switches ................................................................ 16

Motor Torque ....................................................................................... 16

Motor Speed ........................................................................................ 16