SportsArt Fitness T621 User manual

T621 Repair Manual (Electronics)

Table of Contents

1-1-1. Product Picture-T621

1-2-1. Display-T621

1-3-1. Component Placement-T621 Display

1-3-2. Component Placement-T621 Drive Board Area

1-4-1. Block Diagram-T621

1-5-1. Connections-T621 Display Board

1-5-2. Connections-T621 Bridge Board

1-5-3. Connections-T621 Drive Board

1-6-1. Indicator LEDs-T621 Display Board

1-6-2. Indicator LEDs-T621 Drive Board

1-7-1. Display Specifications-T621

2-1-1. Electronics Troubleshooting Chart-T621

3-1-1. Troubleshooting-Safety Key Malfunction-T621

3-2-1. Troubleshooting-Unit Will Not Start Operating-T621

3-3-1. Troubleshooting-Key Malfunction(Display)-T621

3-3-2. Troubleshooting-Key Malfunction-T621

3-4-1. Troubleshooting-Telemetry Heart Rate Malfunction-T621

3-5-1. Troubleshooting-Contact (HTR) Heart Rate Malfunction-T621

3-6-1. Troubleshooting-The Fuse Breaks at Start-T621

3-6-2. Troubleshooting-The Fuse Breaks at Motor Start-T621

3-6-3. Troubleshooting-The Fuse Breaks during Use-T621

3-7-1. Troubleshooting-ERR-1 T621

3-8-1. Troubleshooting-ERR-3 T621

3-9-1. Troubleshooting-ERR-7 T621

3-10-1. Troubleshooting- SERVICE REQUIRED …-T621

3-11-1. Other Information-Unit Settings and Information-T621

3-12-1. Other Information-SERVICE NEEDED…-T621

3-13-1. Other Information-Error Messages-T621

4-1-1. Inspecting and Testing-Transformer Test – T621

4-2-1. Inspecting and Testing-Motor Carbon brush – T621

4-3-1. Inspecting and Testing-wheel, speed sensor – T621

4-4-1. Inspecting and Testing-Motor voltage – T621

4-5-1. Inspecting and Testing-Motor Thermal Sensor Test-T621

4-6-1. Inspecting and Testing-Incline Zero Switch Test-T621

4-7-1. Inspecting and Testing-Incline Motor Voltage Test -T621

1-1. Product Picture-T621

1-1-1

1-2. Display-T621

1-2-1

1-3. Component Placement-T621 Display

1-3-1

Telemetry heart rate receiver board

Display board

1-3. Component Placement-T621 Display

1-3-2

HTR board

Bridge board

Soft keys

Safety key board

1-3. Component Placement –T621 Drive Board Area

1-3-3

Drive board

AC incline motor

Filter

DC motor

Speed sensor

Temperature sensor

Transformer

1-4. Block Diagram-T621

1-4-1

Display

board

Drive

board

Motor

Speed sensor

Temperature

sensor

Incline motor

Zero switch

Transformer

Filter

HTR board

Safety key

Polar board

Keypad

SW

FUSE

AC1

AC2

Bridge

board

Sensor L

Sensor R

1-5. Connections-T621 Display Board

1-5-1

To drive board

To bridge board (keypad)

To bridge board (safety key)

To bridge board (fan)

To bridge board (HTR)

To drive board

To bridge board

To telemetry HR

1-5. Connections-T621 Bridge Board

1-5-2

To safety key board

To HTR board

To display

1-5. Connections-T621 Drive Board

1-5-3

To incline motor

To filter

To motor

To speed sensor

To incline zero switch

To display

To motor temperature sensor

1-6. Indicator LEDs-T621 Display Board

1-6-1

HR indicator

Power indicator



Lit indicates display has

power.

1-6. Indicator LEDs-T621 Drive Board

1-6-2

Incline fuse

Transformer fuse

LED8 ZERO Indicator

Lit = incline is already

calibrated.

LED6 MC Indicator

Flashing indicates motor movement.

LED4 CUS_UP Indicator

Lit = Cushion motor is extended (firm).

LED11 I_SENSE Indicator



Lit = High current protective

function is activated.

LED3 CUS_DN Indicator

Lit = Cushion motor is retracted (soft).

LED2 POWER Indicator

Lit = Power is supplied.

LED10 Motor Thermal Switch Indicator

Lit = Motor is overheated; protective function is

activated.

LED1 SOFT Indicator

Lights automatically two

seconds after powering up.

LED5 EMG Indicator

Lit = There is voltage to the motor.

Not lit = Emergency stop switch is activated.

LED9 UP Indicator

Lit = Incline is operating up.

LED7 DN Indicator

Lit = Incline is operating down.

1-7. Display Specifications-T621

Specification

Details

Notes

Exterior power supply

110V / 220V

Motor

DC motor (with internal thermal switch)

Has brushes

Has heat protection

Speed sensor

Infrared optic sensor

Speed Range

KPH: 0.2 - 20.0(KPH)

MPH: 0.1 –12.0(MPH)

Incline Range

Power: AC motor (110V or 220V)

Incline range: 0 % -15 %

0% setting, time control

1% per 2 seconds

Display

LED＋16-segment＋7-segment LED＋dot matrix

Workout Programs

MANUAL, RANDOM, HILL, INTV, GLUTE,

Heart rate control

program

CARDIO, WT LOSS, ZONE TRAINER

Heart rate

HTR / Telemetry

1-7-1

2-1. Electronics Troubleshooting Chart-T621

Malfunction

Circumstance

Inspection and test points

Components to

replace

Notes

Safety key

malfunction

Put safety key in place.

Display has no reaction.

“Safety key” appears on the

display.

1. Inspect the cable connections on the lower part of the

display and safety key.

2. Inspect the safety key magnet.

3. Inspect the safety key board.

Safety key board

No start up

Power on, indicator does

not light.

1. Inspect the power cord connection.

2. Inspect all cable connections.

3. Inspect the fuse, the fuse holder, and the power switch.

4. Drive board components have an electrical short.

Replace the drive board.

1. Fuse, fuse holder

2. Drive board

No start up

Power on, indicator lights

but the display does not

light.

1. Inspect all cable connections, including connector

cables.

2. Inspect whether drive board LED2 lights:

a. If LED2 lights, inspect and test the transformer fuse.

3. Inspect whether LED1 on the display lights.

a. If LED1 does not light, inspect the data cable from the

display to the drive board.

b. If LED1 does light, inspect the display program IC.

Re-install the display IC.

1. Transformer

2. Drive board

3. Display board

program IC

Telemetry heart

rate malfunction

Telemetry heart rate

malfunction

1. Inspect the heart rate transmitter strap and its

batteries. Replace batteries if they have not been

replaced recently.

2. Inspect the receiver board cables.

3. Test or replace the receiver board.

4. Inspect for environmental interference, for example,

from speakers and lights.

1. Heart rate

transmitter

2. Heart rate

receiver board

Contact heart

rate malfunction

Contact heart rate

malfunction

1. Inspect the HTR wire connections on the bridge board.

2. Inspect the HTR indicator light.

3. Replace the HTR board.

1. HTR board

(HTR=heart touch

rate = contact heart

rate)

2-1-1

Soft key

malfunction

(display)

Press soft key, display no rebound,

1. Replace the display soft key.

Soft key

(display)

Soft key

malfunction

Key does not operate,

or operates continually.

1. Inspect the bridge board soft key connection.

2. Replace the soft key.

Soft key

ERR 1

Motor does not rotate, ERR1

appears.

1. There is no power to the motor; the motor

cannot operate.

2. Inspect the motor brushes.

3. Measure voltage from the drive board

to the motor. If there is no voltage, replace the

drive board. If there is voltage, inspect the

following:

a. transformer voltage

b. whether the EMG indicator lights

c. whether IGBTs have an electrical

short. If so, replace the drive board.

4. Inspect the motor brushes and the

commutator.

1. Drive board

2. Motor brushes,

commutator

ERR 1

Motor rotate, ERR1 appears,

1. The program did not detect the optic sensor

signal.

2. Inspect the CLK indicator on the drive board.

If the CLK indicator is not lit, clean or replace the

speed sensor. If the CLK indicator lights

normally, inspect the data cable from the display

to the drive board. Re-install the display program

IC. Re-install the display IC.

Speed sensor

ERR 3

Display speed differs from actual

speed.

1. Inspect the KPH/MPH setting.

2. Inspect teeth on the optic wheel.

3. Replace the speed sensor.

4. Replace the drive board.

1. Speed sensor

2. Drive board

ERR 7

ERR7 appears at startup.

1. Inspect the incline cable connections.

2. Inspect whether incline has calibrated.

1. Zero calibration

switch

2. Drive board

2-1-2

KPH/MPH setting

1. Press the <CHANGE> key three seconds;

the display will show

“UNIT-MPH” or “UNIT-KPH”.

2. Press INCLINE<▲>/<▼> to select KPH or

MPH. Press <ENTER> to confirm your choice.

FOR ACCURATE HR ,

HOLD SENSORS

FIRMLY WHILE

WALKING

FOR ACCURATE HR ,

HOLD SENSORS FIRMLY

WHILE WALKING

1. Hold contact heart rate grips firmly to test the

HTR function.

2. If you are already holding grips firmly, inspect

the HTR contact wire connections.

SERVICE REQUIRED

TREADMILL SHUTTING

DOWN STOPPING

Display shows

“SERVICE REQUIRED

TREADMILL SHUTTING

DOWN STOPPING”

1. Motor thermal protection unit is activated.

Let the unit rest half an hour or more to cool.

2. If this message often appears, please

inspect the treadmill walk belt and deck.

Lubricate if necessary.

3. If the walk belt is worn, replace the walk

belt.

SERVICE

NEEDED-APPLY LUBE

SERVICE

NEEDED-APPLY LUBE

1. This lubrication prompt appears every 4000

KM. Follow lubrication and maintenance

procedures in the owner’s manual.

2. Enter lubrication procedure INCLINE <▲>

+ INCLINE<▼>+<0>.

View total distance, total

time

1. Press and hold the INCLINE <▲> +

INCLINE<▼> + <STOP> keys for 2 seconds.

2. The display will show the total distance and

total time

2-1-3

Troubleshooting

Model: T621

Malfunction: Safety key malfunction

Circumstance: Put the safety key in place. The display

does not operate. Display shows “safety key”.

Possible cause: Safety key board malfunction

Troubleshooting: 1. Inspect the safety key magnet.

2. Inspect the bridge board cable connections.

3. Test or replace the safety key board.

3-1-1

Display

board

Bridge

board

Safety key

board

Bridge board

Safety key connection

Safety key & safety key board

Safety key(reed switch test)

With safety key

Reed switch  ON

Without safety key

Reed switch 

OFF

Reed switch

Troubleshooting

Model: T621

Malfunction: Unit does not operate

Circumstance: Turn on unit power; the power indicator does not light.

Possible cause: Inadequate incoming power supply or component malfunction.

Troubleshooting: 1. Inspect the power cable connection.

2. Inspect cable connections under the motor cover.

3. Inspect the main fuse, fuse holder, and the power switch.

4. Inspect drive board components for signs of burning. Or replace the drive board as a test.

3-2-1

Drive

board

Display

board

Filter

SW

FUSE

AC1

AC2

Drive board

Fuse, fuse holder, switch

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SportsArt Fitness T621 User manual

SportsArt Fitness T621 User manual

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