T611 Repair Manual (Electronics)
Table of Contents
1-1-1. Product Picture – T611
1-2-1. Overlay – T611
1-3-1. Component Placement – T611 Display Board
1-3-2. Component Placement – T611 Lower Compartment
1-4-1. Display Block Diagram – T611
1-5-1. Cable Connections – T611 Display Board
1-5-2. Cable Connections – T611 Drive Board
1-6-1. LED Indicators – T611 Display Board
1-6-2. Indicator LEDs – T611 Drive Board
1-7-1. Electronic Specifications – T611
2-1-1. Electronic Malfunction Troubleshooting Table – T611
3-1-1. Troubleshooting – Safety Key Malfunction – T611
3-2-1. Troubleshooting – No Start Up – T611
3-2-2. Troubleshooting – No Start Up – T611
3-3-1. Troubleshooting –Key Malfunction – Soft Keys – T611
3-4-1. Troubleshooting –Key Malfunction – Soft Keys – T611
3-5-1. Troubleshooting – No Incline Operation – T611
3-6-1. Troubleshooting – Incline Position Malfunction – T611
3-7-1. Troubleshooting – HTR Malfunction – T611
3-8-1. Troubleshooting – Fuse Broke at Start –T611
3-8-2. Troubleshooting – Fuse Broke after Motor Moves –T611
3-8-3. Troubleshooting – Fuse Broke after Use – T611
3-9-1. Troubleshooting – ERR-1 Appears before Motor Moves – T611
3-9-2. Troubleshooting – ERR-1 Appears after Motor Moves – T611
3-10-1. Troubleshooting – ERR-3 – T611
3-11-2. Troubleshooting – ERR-7 – T611
3-12-1. Troubleshooting – ERR-10 – T611
3-13-1. Troubleshooting –SERVICE REQUIRED… – T611
3-14-1. Other Topics – Basic Parameter Settings – T611
3-15-1. Other Topics – Error Code Chart – T611
4-1-1. Inspection and Measurement – Optic Sensor – T611
4-2-1. Inspection and Measurement – Transformer – T611
4-3-1. Inspection and Measurement – Motor Brushes – T611
4-4-1. Inspection and Measurement – Motor Voltage Measurement – T611
4-5-1. Inspection and Measurement – Incline Voltage Measurement – T611
4-6-1. Inspection and Measurement – VR Voltage Measurement – T611
4-7-1. Inspection and Measurement – Incline Motor and VR Calibration – T611
1-1. Product Picture – T611
1-1-1
1-2. Overlay – T611
1-2-1
1-3. Component Placement –
T611 Display Board
1-3-1
Display board
Telemetry heart rate receiver board
1-3. Connections-T611 Bridge Board
1-3-2
To Safety key board
HTR board
Soft key
Bridge board
1-3. Component Placement – T611 Lower Compartment
1-3-3
Drive board
Motor
Transformer
DC incline motor
Incline VR set
Optic sensor
Filter
1-4. Display Block Diagram – T611
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
Inductor (220v)
1-5. Cable Connections – T611 Display Board
1-5-1
To telemetry heart rate receiver board
To bridge board
HTR
To bridge
safety key board
To drive board
To bridge board
soft key
1-5. Connections-T611 Bridge Board
1-5-2
To Safetykey board
To HTR board
T
o Display
1-5. Cable Connections – T611 Drive Board
1-5-3
To transformer
To optic sensor
To display board
To motor thermal sensor
To display board
To power supply AC1, AC2
M+,M- To motor
To incline motor To VR set
1-6. LED Indicators – T611 Display Board
1-6-1
LED1 power indicator
Lit indicates 5 VDC power
supply.
1-6. Indicator LEDs – T611 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 – T611
Specification
Details Notes
Exterior power supply
110V / 220V
Motor
DC motor (with internal thermal switch)
With brushes
With heat protection
3.0 Hp
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 LED, Dot matrix led
Windows
WT LOSS 65%, HEART RATE, CARDIO 80%,
Calories, SPEED, TIME, DISTANCE ,
CAL/HR, METS, PACE, INCLINE,TIME
Workout programs
MANUAL / HILL / RANDOM / INTV / CARDIO / GLUTE / ZONE TRAINER
WT LOSS / CARDIO
Heart rate control
program
HRC 65% / HRC 85%
Heart rate
HTR / telemetry
1-7-1
2-1. Electronic Malfunction Troubleshooting Table – T611
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 – T611
Malfunction Circumstance Inspection and test points Components to
replace
Notes
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
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
2-1-2
2-1. Electronic Malfunction Troubleshooting Table – T611
Malfunction Circumstance Inspection and test points Components to
replace
Notes
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
SERVICE
REQUIRED…
Display shows “SERVICE
REQUIRED TREADMILL
SHUTTING DOWN
STOPPING
1. Inspect the motor thermal switch wire connection and the LED4
M-TEMP on the drive board. Feel the motor. Is it hot?
2
. 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.
3.The running belt and deck need to lubrication.
4.Inspect the running belt and deck.
5.if necessary , replace the running belt.
6. If steps above do not solve the problem, replace the motor.
1.Running belt
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, total time ,and user
id on/off setting appear.
2-1-3
2-1. Electronic Malfunction Troubleshooting Table – T611
Malfunction Circumstance Inspection and test points Components to
replace
Notes
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: T611
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
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
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