SportsArt Fitness TR20F Operating instructions

TR20F Repair Manual (Electronics)

Table of Contents
1-1-1. Product Picture - TR20F
1-2-1. Overlay - TR20F
1-3-1. Component Placement - TR20F Display Board
1-3-2. Component Placement - TR20F Lower Compartment
1-4-1. Display Block Diagram - TR20F
1-5-1. Cable Connections - TR20F Display Board
1-5-2. Cable Connections - TR20F Drive Board
1-6-1. LED Indicators - TR20F Display Board
1-6-2. Indicator LEDs - TR20F Drive Board
1-7-1. Electronic Specifications - TR20F
2-1-1. Electronic Malfunction Troubleshooting Table - TR20F
3-1-1. Troubleshooting – Safety Key Malfunction - TR20F
3-2-1. Troubleshooting – No Start Up - TR20F
3-2-2. Troubleshooting – No Start Up - TR20F
3-3-1. Troubleshooting –Key Malfunction – Soft Keys - TR20F
3-4-1. Troubleshooting –Key Malfunction – Soft Keys – TR20F
3-5-1. Troubleshooting – No Incline Operation - TR20F
3-6-1. Troubleshooting – Incline Position Malfunction - TR20F
3-7-1. Troubleshooting – HTR Malfunction - TR20F
3-8-1. Troubleshooting – Fuse Broke at Start -TR20F
3-8-2. Troubleshooting – Fuse Broke after Motor Moves -TR20F
3-8-3. Troubleshooting – Fuse Broke after Use - TR20F
3-9-1. Troubleshooting – ERR-1Appears before Motor Moves - TR20F
3-9-2. Troubleshooting – ERR-1Appears after Motor Moves - TR20F
3-10-1. Troubleshooting – ERR-3 - TR20F
3-11-2. Troubleshooting – ERR-7 - TR20F
3-12-1. Troubleshooting – ERR-10 - TR20F
3-13-1. Troubleshooting – ERR-14 - Motor Overheats - TR20F
3-13-2 Troubleshooting – ERR-14 - Fold Up Switch - TR20F
3-14-1. Other Topics – Basic Parameter Settings - TR20F
3-15-1. Other Topics – Error Code Chart - TR20F

Table of Contents
4-1-1. Inspection and Measurement – Optic Sensor - TR20F
4-2-1. Inspection and Measurement – Transformer - TR20F
4-3-1. Inspection and Measurement – Motor Brushes - TR20F
4-4-1. Inspection and Measurement – Motor Voltage Measurement - TR20F
4-5-1. Inspection and Measurement – Incline Voltage Measurement – TR20F
4-6-1. Inspection and Measurement – VR Voltage Measurement – TR20F
4-7-1. Inspection and Measurement – Incline Motor and VR Calibration - TR20F
4-8-1. Inspection and Measurement – Fold Up Switch Inspection - TR20F

1-1. Product Picture – TR20F
1-1-1

1-2. Overlay - TR20F
1-2-1

1-3. Component Placement - TR20F Display Board
1-3-1
Display board
Telemetry heart rate receiver board
HTR board
Bridge board
Safety key board

1-3. Component Placement - TR20F Lower Compartment
1-3-2
Drive board
Motor
Transformer
DC incline motor
Incline VR set
Optic sensor
Fold up switch

1-4. Display Block Diagram - TR20F
1-4-1
Display
board
Drive
board
Motor
Optic sensor
Thermal sensor
Incline motor Incline VR
Transformer
Filter
HTR board
Safety key
Telemetry
receiver board
Key pad
SW
FUSE
AC1
AC2
Bridge
board
Sensor L
Sensor R
Fold up switch

1-5. Cable Connections - TR20F Display Board
1-5-1
To telemetry heart rate receiver board
To HTR receiver board
To safety key board
To drive board
To keys on upper part of
display board
To keys on lower part of display board

1-5. Cable Connections - TR20F Drive Board
1-5-2
To transformer
To power supply AC1, AC2
To incline motor
To optic sensor
To VR set
To display board
To motor thermal sensor
and fold up switch
Fold up switch

1-6. LED Indicators - TR20F Display Board
1-6-1
LED1 power indicator
Lit indicates 5 VDC power
supply.

1-6. Indicator LEDs - TR20F Drive Board
1-6-2
LED 4 M-Temp
Lit indicates motor
temperature is too hot.
LED 2
Lit indicates VCC
power supply.
LED 7 MC indicator
Flashing indicates an incoming
optic sensor signal.
LED 3 EMG
Lit indicates motor
circuit error.
LED5 INC-DN
Lit indicates incline is
operating downward.
LED6 INC-UP
Lit indicates incline is
operating upward.
Transformer fuse

1-7. Electronic Specifications - TR20F
Specification Details Notes
Exterior power supply
110V / 220V
Motor DC motor (with internal thermal switch) With brushes
With heat protection
Optic sensor Infrared optic sensor
Speed range KPH: 0.8 - 16.0(KPH)
MPH: 0.5 –10.0(MPH)
Incline Power: DC motor 40V
Incline range: 0% -15%
VR calibration: 0%= 1.20V; 15% = 3.57V
Display LCD display
Windows
TIME / DISTANCE / CALORIE / PULSE
Workout programs
PROGRAM 1 – PROGRAM 5
INTV1 / INTV2
Heart rate control
program
HRC 65% / HRC 85%
Heart rate HTR / telemetry
1-7-1

2-1. Electronic Malfunction Troubleshooting Table - TR20F
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
(Heart touch rate
= contact heart
rate)
2-1-1

2-1. Electronic Malfunction Troubleshooting Table - TR20F
Incline
position is
not correct.
Incline position on display
differs from actual position. 1. Inspect all cable connections. 2. Inspect drive board incline VR voltage across red and green
wires. Normal: 0% = 1.20 VDC, 15% = 3.57 VDC. If not,
recalibrate the incline VR.
3. If VR voltage fluctuates greatly, the VR is bad. Replace the VR.
If the VR voltage is correct but the height is incorrect, replace
the display board.
1. VR
2. Display board
Key
malfunction Key does not operate or operates continually. 1. Inspect the soft key connection. 2. If the <program> or <change> key is bad, replace the upper
soft keys on the display.
3. If other keys malfunction, replace the lower soft keys on the
display.
1. Soft keys
(upper)
2. Soft keys
(lower)
ERR 1
Motor does not rotate, ERR
1 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. Replace the drive
board.
4. Inspect motor brushes or the commutator.
1. Drive board
2. Motor brushes,
motor
ERR 1 Motor operates, ERR 1
appears. 1. The program did not detect the optic sensor signal. 2. Inspect the CLK indicator on the drive board.
a. If the CLK indicator is not lit, clean or replace the optic sensor.
b. If the CLK indicator lights normally, inspect the data cable from
the display to the drive board. Re-install the display IC.
1. Optic sensor
2-1-2

2-1. Electronic Malfunction Troubleshooting Table - TR20F
ERR 3 Display speed differs from
actual speed. 1. Inspect KPH/MPH setting. 2. Inspect the optic wheel teeth.
3. Replace the optic sensor.
4. Replace the drive board.
1. Optic sensor 2.
Drive board
ERR 7 ERR7 appears at startup. 1. Inspect the incline VR cable connection.
2. Usually ERR7 indicates the display is stuck at either the highest
or lowest position.
3. Inspect whether LED5 and LED6 light on the drive board. If lit,
the display or cable malfunction may be causing a malfunction.
4. Inspect whether the drive board emits voltage to the incline
motor. If not, replace the drive board.
5. Recalibrate the incline set or replace the incline set as a test.
1.VR
2. Drive board
ERR14 Display shows ERR14. The
motor overheat protective
function operates.
1. Inspect the motor thermal switch wire and the fold up wire
connection.
2. Inspect the motor thermal switch wire. Feel the motor. Is it hot?
3. If the motor is hot and the unit has been in use, turn off the unit.
Let the unit rest one half hour or more. Then turn off the unit.
4. If ERR14 appears repetitively and the motor is hot, lubricate or
replace the walk belt.
5. If steps above do not solve the problem, replace the motor.
1. Drive board
ERR14 Display shows ERR14, the
fold up mechanism
malfunctions.
1. Inspect the thermal switch and fold up switch cables.
2. Inspect whether the fold up switch has operated
inappropriately. During normal operation, the fold up switch
cannot touch the unit frame.
2-1-3

2-1. Electronic Malfunction Troubleshooting Table - TR20F
Main fuse is
broken. Turn on unit. The fuse blows. 1. Inspect whether the power cord has an electrical short. 2. Drive board components have an electrical short. Replace the
drive board.
1. Drive board
Main fuse is
broken. Press the speed up key. The motor start up fuse blows. 1. Inspect the motor for abnormalities. 2. Replace the drive board.
3. Replace the motor.
1. Motor
2. Drive board
Main fuse is
broken. In use, the main fuse blows.
1. Inspect whether the main power voltage is too low. Normal is
110V or 220V +- 10%.
2. Inspect whether the walk belt is too tight.
3. Inspect the walk belt for wear. Lubricate or replace it.
4. Inspect the condition of the fuse holder and fuse.
5. Replace the drive board.
6. Inspect motor brushes.
1. Walk belt
2. Drive belt
3. Drive board
Show total
distance Do not put the safety key in place. Press and hold the <CHANGE> key for three seconds. The program IC version,
metric/imperial unit selection, total distance, and total time
appear.
Telemetry
heart rate
malfunction
No heart rate reading,
please check transmitter 1. This error statement appears when the display IC does not receive the HRC signal.
2. Inspect whether the heart rate transmitter strap is fastened
securely.
3. Replace transmitter strap batteries or the transmitter strap
itself.
1. Heart rate
transmitter
2-1-4

Troubleshooting
Model: TR20F
Malfunction: Safety key malfunction
Circumstance: Put the safety key in place. The display shows no reaction.
“Safety key” appears.
Possible cause: Safety key board malfunction
Troubleshooting: 1. Inspect the safety key magnet.
2. Inspect bridge board connections.
3. Test or replace the safety key board.
3-1-1
Display
Board
Bridge
board
Safety key
board
Bridge board
Safety key board
Safety key
cable
Safety key reed switch test
Put safety
key magnet in
place
Reed switch: electrical
continuity ON
Do not put the
safety key
magnet in
place
Reed switch: electrical
open OFF

Troubleshooting
Model: TR20F
Malfunction: No start up. Unit does not operate.
Circumstance: Turn unit power on. The power indicator does not light.
Possible cause: 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 power switch.
4. Inspect the drive board components for signs of burning.
Or replace the drive board as a test.
3-2-1
Drive
board
Display
board
Filte r
SW
FUSE
AC1
AC2
Drive board
Inspect the main fuse, fuse holder, and power switch.

Troubleshooting
Model: TR20F
Malfunction: No start up. Unit does not operate.
Circumstance: Turn unit power on. The power indicator does not light.
Possible cause: 1. AC power supply enters the drive board, goes through
the fuse, into the transformer, then into the drive board.
2.Cables are not connected properly, or the drive board
is malfunctioning.
Troubleshooting: 1. Inspect all cable connections.
2. Inspect whether LED2 on the drive board lights.
A. If LED2 does not light, inspect the transformer fuse
and measure transformer input and output voltages.
3. Inspect whether LED1 on the display board lights.
A. If it does not light, inspect cable connections from
the display to the drive board.
B. If it does light, inspect the display IC. Re-install the
display IC.
3-2-2
Drive
board
Display
board
Transformer
FUSE
AC1
AC2
LED2
LED1
濾波器
主程式 IC
LED1 power indicator
Lit indicates incoming 5V
power supply.
Transformer voltage
Transformer VAC
(red-red)
(blue-blue) 110V (red)
220V(blue)
black-black 12.5V
white-white 12.5V
orange-orange
29V
yellow-yellow 11.5V
Inspect the transformer fuse
LED2 VCC power
Program IC