T652 Repair Manual (Electronics)
Table of Contents
1-1-1. Product Illustration – T652
1-2-1. Display – T652
1-3-1. Component Placement – T652 Display
1-3-2. Component Placement – T652 Drive Compartment
1-4-1. Block Diagram of Electronic Components – T652
1-5-1. Cable Connections - T652 Display
1-5-2. Cable Connections - T652 EAC Drive Board
1-6-1. LED Indicators - T652 Display Board
1-6-2. LED Indicators - T652 Drive Board
1-7-1. Electronic Specifications - T652
2-1-1. Electronic Component Troubleshooting Chart - T652
3-1-1. Troubleshooting – Safety Key Malfunction - T652
3-2-1. Troubleshooting – Unit Will Not Start - T652
3-3-1. Troubleshooting – No Telemetry Heart Rate - T652
3-4-1. Troubleshooting – Key Malfunction – Soft Keys - T652
3-5-1. Troubleshooting – Key Malfunction – Display Keys - T652
3-6-1. Troubleshooting – Incline Operation Malfunction - T652
3-7-1. Troubleshooting – Contact Heart Rate Malfunction - T652
3-8-1. Troubleshooting – Fuse Breaks at Start – T652
3-8-2. Troubleshooting – Fuse Breaks at Speed - T652
3-8-3. Troubleshooting – Fuse Breaks in Use - T652
3-9-1. Troubleshooting – ERROR_1_1_T652
3-9-2. Troubleshooting – ERROR_1_2_T652
3-9-3. Troubleshooting – ERR0R_1_3_T652
3-10-1. Troubleshooting – ERROR_2_1_T652
3-11-1. Troubleshooting – ERROR_3_1_T652
3-12-1. Troubleshooting – ERROR_8_1_T652
3-12-2. Troubleshooting – ERROR_8_2_T652
3-13-1. Troubleshooting – SERVICE NEEDED-APPLY LUBE-T652
3-14-1. Other - KPH/MPH, distance, time, display/drive board program versions - T652
3-15-1. Other – Error Message Chart - T652
1-1. Product Illustration
1-1-1
1-2. Display - T652
1-2-1
1-3. Component Placement -
T652 Display
1-3-1
HTR board
Display board
Bridge board
IPOD earphone board
IPOD audio board
Telemetry heart rate receiver
CARDIO board
1-3. Component Placement - T652 Drive Compartment
1-3-2
EAC drive board
AC incline motor
Filter
EAC servo motor (green
sticker designates EAC)
Inductor
1-4. Block Diagram of Electronic Components - T652
1-4-1
Display
board
Drive
board
Motor
Speed sensor
Thermal switch
Incline motor 0% switch
Inductor
Filter
Polar board
Bridge board
HTR board
Safety key board
Keypad
Polar board
Cardio board
iPod board
iPod keys
iPod
earphone
jack
SW
Fuse
AC1
AC2
To
iPod
Sensor
Sensor
1-5. Cable Connections - T652 Display
1-5-1
To cardio board
To drive board
To bridge board
To telemetry heart rate receiver
To iPod board
To iPod board
1-5. Cable Connections - T652 EAC Drive Board
1-5-2
To motor speed sensor
To thermal sensor
接至電子表組
To filter
To display board
To motor
To incline 0% switch
To incline motor
1-6. Indicator LEDs - T652 Display Board
1-6-1
Power indicator LED
Indicates display is
receiving power.
1-6. LED Indicators - T652 Drive Board
1-6-2
F1 fuse 15A
1-7. Electronic Specifications - T652
Item
Details Notes
Power supply
110V / 220V
Motor
AC servo motor (includes internal thermal sensor)
5.0 HP
Speed sensor
Optic encoder
Speed range
KPH: 0.2 - 24.0 (KPH)
MPH: 0.1 –15.0 (MPH)
Japanese: 0.2-20.0 (KPH)
Japanese version limits
speed to 18 KPH
Incline range
Power: AC motor (110V or 220V)
Incline range: 0 % -15 %
0% setting, time control
1% per second
AC electronic automatic
adjustment
Display method
LED＋16-segment＋7-segment LED＋dot matrix
Program mode
MANUAL, HILL 1、2、3, RANDOM,
GLUTE, INTERVAL, TRACK, FAT BURN
Heart rate control
program
CARDIO, WT LOSS, ZONE TRAINER
Heart rate Contact HTR / telemetry heart rate
1-7-1
2-1. Electronic Component Troubleshooting Chart - T652
Malfunction Circumstance Inspection or test point Replace Notes
Safety key
operation is
malfunctioning
Put Safety key in place.
There is no reaction from the
display. “Safety Key” error
message appears.
1. Inspect the cable connections at the bridge board and
safety key
2. Replace the safety key.
Safety key board
No start up Turn on the power. Display
shows no reaction.
1. Inspect main fuse.
2. Inspect drive board fuse and LED.
3. Inspect all cable connections.
4. Inspect display LED and program IC.
1. Main unit fuse
2. Drive board
3. Cables
4. Display
No incline
operation
Press incline keys. The
incline does not operate up or
down.
1. Inspect incline 0% switch.
2. Inspect drive board cable connections.
3. Replace drive board.
4. Incline motor malfunction.
1. Drive board
2. 0% switch
No telemetry
heart rate
reception
Telemetry heart rate does not
function.
1. Inspect heart rate transmitter strap and battery. Replace
the battery if the strap has not been used for a long time.
2. Inspect heart rate receiver board cable connection.
3. Inspect or replace the telemetry heart rate receiver board.
4. Inspect environment for interference, such as speakers
and lights.
1. Heart rate
transmitter
2. Heart rate
receiver
No contact heart
rate reception
Contact heart rate does not
function.
1. Inspect the HTR cable connection to the bridge board.
2. Inspect the HTR indicator LEDs.
3. Replace the HTR board.
1.HTR board
Key malfunction
(display)
Keys do not operate or keys
operate continuously.
1. Replace the display key switches. Display board key
switches
Key malfunction
(soft key)
Keys do not operate or keys
operate continuously.
1. Inspect the soft key cable connection on the bridge
board.
2. Replace the soft key.
Soft keys
2-1-1
2-1. Electronic Component Troubleshooting Chart - T652, Continued.
Malfunction Circumstance Inspection or test point Replace Notes
ERR0R_1_1_ Servo motor encoder
malfunction
1. If motor does not rotate, the EAC drive board could be the issue.
2. If the motor rotates and ERROR_1_1_ appears, replace the motor
speed sensor.
1. EAC
drive board
2. Servo
encoder
ERR0R_1_2_ Servo motor thermal sensor is
activated; speed is reduced to
half speed.
1. Inspect motor temperature. If it is not hot, inspect the thermal
sensor cable connection.
2. Inspect walk belt tightness.
3. Inspect walk belt wear.
4. Lubricate the belt. If lubrication is not effective, replace the walk
belt..
1. Walk
belt
ERROR_2_1_ IGBT over current malfunction
1. Re-start the unit as a test.
2. If issue is repeated, replace the EAC drive board.
1. EAC
drive board
ERR0R_2_2_ IGBT over heat malfunction 1. Re-start the unit as a test.
2. If issue is repeated, replace the EAC drive board.
1. EAC
drive board
ERROR_3_1_ Incline motor calibration
malfunction
1. Inspect cable connections.
2. After starting the unit, feel the incline motor. If hot, the drive board
is malfunctioning.
3. After starting the unit, inspect whether incline 0% switch operates.
If so, the drive board is malfunctioning.
4. Inspect the 0% switch operation.
1.EAC
drive board
2.Incline
0% switch
Power off Power is off. 1. Re-start the unit as a test.
2. If issue is repeated, replace the EAC drive board.
1. EAC
drive board
ERR0R_4_2_ Low voltage supply 1. Power supply is too low.
2. Measure power supply voltage. If too low, external power supply is
insufficient. Please have an electrician address the situation.
3. After fixing the power supply, use the product to confirm its safety.
2-1-2
2-1. Electronic Component Troubleshooting Chart - T652, Continued.
Malfunction Circumstance Inspection or test point Replace Notes
ERROR_4_3_ High voltage supply 1. External power supply voltage is too high.
2. Turn off unit. Re-start the unit. If the message still appears, this
may be a time period of low voltage use, creating excessive voltage.
This issue often occurs in industrial areas.
3. For safety, wait until the power supply voltage drops before using
the unit.
ERROR_8_1_ Communication error at start
up
1. Cables are not connected.
2. EAC drive board is malfunctioning.
1. EAC
drive board
ERROR_8_2_
Communication error after
start up
1. Inspect for environmental interference.
2. Inspect power supply for an actual ground.
3. Replace the EAC drive board.
1. EAC
drive board
Main fuse
breaks.
Fuse breaks at start up 1. Inspect components for electrical shorts.
2. Inspect power supply for an electrical short.
3. Replace the drive board/incline/filter.
1. EAC
drive board
Main fuse
breaks.
Press the speed key; motor
rotates; fuse breaks.
1. Inspect the motor for abnormalities.
2. Replace the drive board.
1. EAC
drive board
Main fuse
breaks.
During use, main fuse
suddenly breaks.
1. Inspect the main power supply for low voltage.
Normal is 110v (N. America) or 220v (Europe) +-10%.
2. Inspect whether walk belt is excessively tight.
3. Inspect the walk belt and deck for wear. Lubricate the walk belt.
4. Inspect the fuse holder and fuse.
5. Replace the EAC drive board as a test.
1. Walk
belt
2. EAC
drive board
SERVICE
NEEDED -
APPLY LUBE
Display shows:
”SERVICE NEEDED -
APPLY LUBE ”
This lubrication prompt appears every 4000 KM. Follow lubrication
and maintenance procedures in the owner’s manual.
2-1-3
2-1. Electronic Component Troubleshooting Chart - T652, Continued.
Malfunction Circumstance Inspection or test point Replace Notes
Show total
distance
Press the <CHANGE> key three seconds
to see KM/Miles, total distance, total time,
display IC version, drive board IC version.
Contact HTR
heart rate
malfunction
FOR ACCURATE HR, HOLD
SENSORS FIRMLY WHILE
WALKING
1. Hold contact heart rate grips firmly to test
HTR function.
2. If you are already holding grips firmly,
inspect the HTR contact wire connections.
2-1-4
Troubleshooting
Model: T652
Malfunction: Safety key malfunction
Circumstance: Put the safety key in place; the display shows no reaction; “Safety key” error message appears.
Possible causes: Safety key board malfunction
Troubleshooting: 1. Inspect the safety key magnet.
2. Inspect the bridge board wire connections.
3. Test or replace the safety key board.
3-1-1
Display
Board
Bridge
board
Safety key
board
Troubleshooting
Model: T652
Malfunction: Unit will not start operating.
Circumstance: Turn POWER ON; the display does not light.
Possible cause: Incoming power issue; component failure.
Troubleshooting: 1. Inspect the main fuse and power switch.
2. Inspect all cable connections.
3. Inspect drive board power LED. Or replace the drive
board as a test.
4. Inspect the display power LED and main IC.
3-2-1
Drive
board
Display
board
Filter
Power
switch
FUSE
AC1
AC2
Fuse and
power switch
Filter
EAC drive board
組
Cables
Main program IC
Troubleshooting
Model: T652
Malfunction: Telemetry heart rate malfunction
Circumstance: Telemetry heart rate reading does
not appear or the value is incorrect.
Possible cause: 1. Telemetry heart rate batteries
2. Heart rate receiver
3. Environmental interference, for
example, lights and speakers
Troubleshooting: 1. Replace telemetry heart rate
transmitter or its batteries
2. Inspect telemetry receiver board cable
connections
3. Replace the telemetry receiver board
as a test.
3-3-1
Telemetry
HR receiver
Display
board
Transmitter
Telemetry heart rate receiver
board
Telemetry transmitter
(battery area)
Troubleshooting
Model: T652
Malfunction: Soft key malfunction
Circumstance: Press display board keys. There is no reaction, or keys operate continuously.
Possible causes: 1. Soft keys are not connected properly at the bridge board.
2. Soft keys are bad.
Troubleshooting: 1. Inspect the soft key connection at the bridge board.
2. Replace the soft keys.
3-4-1
Bridge board
Display board
Key pad
Soft keys
Soft key connector
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