Dyaco ST300-YT42, ST300-YT35 Service Manual

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SSeerrvviiccee MMaannuuaall

WARNING:

ALWAYS UNPLUG THE TREADMILL FROM THE ELECTRICAL

OUTLET BEFORE SERVICING THE UNIT.

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TABLE OF CONTENTS

Table of Contents...................................................................... 1

Table of Figures ........................................................................ 3

Description................................................................................ 4

A E

LECTRICAL CONFIGURATION

....................................... 4

1. ST300-YT42 Treadmill components ............................ 4

B G

ENERAL INFORMATION

................................................. 5

1. Console ......................................................................... 5

2. Main controller.............................................................. 5

3. Treadmill motor ............................................................ 5

Operation................................................................................... 7

A W

INDOW DISPLAY MODE

............................................... 7

1. OFF Mode..................................................................... 7

2. READY Mode .............................................................. 7

3. SLEEP Mode ................................................................ 7

4. RUN Mode.................................................................... 7

B F

UNCTION

........................................................................ 8

1. SPEED .......................................................................... 8

2. INCLINE....................................................................... 8

3. TIME............................................................................. 8

4. DISTANCE................................................................... 9

5. CALORIES ................................................................... 9

6. PULSE .......................................................................... 9

7. LAPS............................................................................. 9

8. SCAN............................................................................ 9

C F

UNCTION BUTTON IN MAIN MODE

............................. 10

1. READY MODE .......................................................... 10

2. RUN MODE ............................................................... 11

D C

ALIBRATION PROCEDURE

........................................... 12

1. Calibration................................................................... 12

Troubleshooting ...................................................................... 13

1. General........................................................................ 13

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2. Troubleshooting Matrix .............................................. 14

3. controller debugging form .......................................... 21

Diagrams and Schematics ....................................................... 22

APPENDIX A......................................................................... 27

1. TREADBELT ADJUSTMENT .................................. 27

APPENDIX B ......................................................................... 29

1. TREADMILL LUBRICATION ................................. 29

APPENDIX C ......................................................................... 30

1. RESET SWITCH RESETTING ................................. 30

APPENDIX E ......................................................................... 31

1. SPEED SENSOR ADJUSTMENT............................. 31

2. SERVICE QUESTIONS............................................. 31

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TABLE OF FIGURES

Figure 1 Operational Flowchart ............................................... 6

Figure 2 Console Layout........................................................ 22

Figure 3 Mechanical Layout .................................................. 22

Figure 4 Main Controller information & voltages ................. 23

Figure 5 Function JK1 connector on Main Controller........... 23

Figure 6 Wiring Diagram....................................................... 25

Figure 7 Schematic Diagram ................................................. 26

Figure 8 If Treadbelt slips...................................................... 27

Figure 9 If tread belt shifts too far to the Right ..................... 27

Figure 10 If tread belt shifts too far to the Left...................... 28

Figure 11 Resetting Reset switch........................................... 30

Figure 12 Fuse replacement ................................................... 31

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DESCRIPTION

A E

LECTRICAL CONFIGURATION

Note: Electrical servicing of this treadmill is limited to board

level replacement.

1. ST300-YT42 TREADMILL COMPONENTS

a) SFAETY KEY:

To fits on the Console that activate all functions. If no
safety key, console can not be controlled.

b) Console:

Interface that controls all functions of the treadmill.

c) Main controller:

The circuit board consist of the DC power supply for
console、incline driver and DC motor driver, link the
console to output appropriate voltages for motor that
control the treadmill functions.

d) Treadmill motor:

This is a variable speed for DC motor. To control the 0 –90
voltages on the main controller, it can to increase or
decrease speed of running belt.

e) Incline motor:

This is an ac motor. User can to control variable

elevation by console within main controller.

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B G

ENERAL INFORMATION

1. CONSOLE

a) This is 7.5 inch multi windows LCD. It is include 5 data format,

a track, one dot matrix (8x20) and one message windows (12
characters).

2. MAIN CONTROLLER

a) Include power supply 、 motor driver control circuit and

incline control circuit.

3. TREADMILL MOTOR

a) It’s a variable speed that be controlled on DC motor.

b) Have three wires red, black and green.

c) Has three wires red, black and green.

d) If there is DC voltage on the Red wire (M+) the treadmill

motor will turn clockwise.

e) If there is DC voltage on the Black wire (M-) the treadmill

motor will turn counter-clockwise

f) The higher the voltage the faster the motor turns.

g) The green wire is grounding.

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Figure 1 Operational Flowchart

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OPERATION

A W

INDOW DISPLAY MODE

1. OFF MODE

a) When pull the safety key or users press the STOP Button on the

console, the treadmill enters the OFF Mode and all windows
will appear blank.

2. READY MODE

a) When the treadmill is ON and SAFETY KEY is inserted in

console, the message window will show program name.

b) In READY Mode, if user doesn’t press any button for 30

minutes it will automatically turn off (blank out) enter SLEEP
MODE.

3. SLEEP MODE

a) In SLEEP Mode, if any buttons are pressed then the treadmill

enters READY Mode.

4. RUN MODE

a) In RUN Mode, pressing the “STOP” button and pull out the

safety key that will cause the treadmill stop instantly and enter
OFF Mode.

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B F

UNCTION

1. SPEED

a) Display the current speed in mile per hour.

b) DISPLAY range is 0.0 to 99.9 MPH.

c) WORK range is 0.5 to 12.0 MPH.

d) Press “FAST” or ”SLOW” to adjust speed, each increment and

decrement is 0.1 MPH.

2. INCLINE

a) Display the incline position from 0 to 15.

b) DISPLAY range is 0 to 999.

c) WORK range is 0 to 15.

d) INCLINE preset value is 0 to 15.

e) Press “UP” or ”DOWN” to adjust incline, each increment and

decrement is 1.

3. TIME

a) TIME is either COUNT UP or COUNT DOWN. System preset

is COUNT UP; if user sets the time then timer is COUNT
DOWN.

b) DISPLAY range is 0:00 to 99:99.

c) WORK range is 0:00 to 99:59.

d) COUNT DOWN setup range is 10:00 to 99:00.

e) When TIME is set, the count will go to zero.

f) In RUN Mode, press “START” button to save value of time

and enter “RUN” Mode again that value will continue count up
time.