Service manual

Revision D

Series 2000 Treadmill

409110-004

Control PCB Theory .................................................................. 4-13

General Description .......................................................................... 4-13

Power Distribution ........................................................................... 4-13

Clock Generator ............................................................................... 4-13

Reset Generator ............................................................................... 4-13

Temperature Sensor ........................................................................ 4-14

Processor Circuitry .......................................................................... 4-14

Analog Inputs ................................................................................... 4-14

Speaker Output ................................................................................ 4-14

Analog Outputs ................................................................................ 4-15

Analog Supplies ............................................................................... 4-15

Supplies ........................................................................................... 4-15

ESD and EMI Compatibility .............................................................. 4-15

Brushless DC Drive Theory ......................................................... 4-16

General Description .......................................................................... 4-16

Phases and Power Switches ............................................................ 4-16

Motor Torque ................................................................................... 4-16

Motor Speed .................................................................................... 4-16

Drive Motor Control Box Description ............................................. 4-17

Power Board .................................................................................... 4-17

Control Board ................................................................................... 4-17

LED Functions .................................................................................. 4-17

User Inputs/Outputs ......................................................................... 4-19

Electrical Requirements ................................................................... 4-21

General Fault Isolation ............................................................. 4-22

Visual Inspection .............................................................................. 4-22

Power Down ....................................................................... 4-22

Shroud Removal .............................................................................. 4-23

Parts Locations ................................................................................ 4-24

Power Supply Voltage Checks .......................................................... 4-25

Speaker Check ................................................................................. 4-25

Service Port ..................................................................................... 4-25

Drive Control Fault LEDs .................................................................. 4-26

DC Motor Replacement ............................................................. 4-27

Replacement Instructions ................................................................ 4-27

Front Roller Replacement .......................................................... 4-29

Replacement Instructions ................................................................ 4-29

Walking Belt and Board Replacement ............................................ 4-30

Walking Belt Replacement Instructions ............................................ 4-30

Walking Board Replacement Instructions ........................................ 4-31

Motor Drive Belt Replacement and Adjustments ............................... 4-32

Tension Adjustments ....................................................................... 4-32

Tracking Adjustments ...................................................................... 4-33