SportsArt Fitness G875 Operating instructions

G875 Repair manual (Electronics)

1-1. Product-G875
1-1-1

1-2. Display -G875
1-2-1

1-3.Component placement - G875 Display
1-3-1
Control
board
Program
board
Wireless HR board
USB board

1-3.Component placement - G875 Frame
1-3-2
Power
board
Incline board
Flywheel
Generator
MI drive
board

1-3.Component placement- G875 Frame
1-3-3

1-4. Block diagram -G875
1-4-1
Display
Board
MI
Drive Board
Fuse
SW
Alternator
keypad
USB Board
HR board
C-SAFE Board
Power board
Fan
Sensor-R
Sensor-L
HTR board
Stride motor (R)
Stride VR (R)
Stride motor (L)
Stride VR (L)
Stride / Level key
AC1, AC2

1-5.Wiring diagram -G875
1-5-1

1-5.Wire connections -G875 Display
1-5-2
Control board
Program board
To key pads
To USB board
To POLAR board
To fan
To HTR board
To USB board &
CSAFE board
To drive board
To USB board

1-5. Wire connections -G875 Display
1-5-3
CON3
CON4
7
CON5
CON6
CON1
CON2
CON3
CON1
CON2
USB board
To control
board
To program board
Bluetooth key
To control
board

1-5. Wire connections -G875 MI drive board
1-5-4
To generator
To power board
To incline board

1-5. Wire connections -G875 MI drive board
1-5-4
Incline board wires
Power board wires
To MI drive board
To power board
To control board
To MI drive board
To incline
board

1-6. LED indicator -G875 Display
1-6-1
LED16 POWER
indicator
LED18 COMM communication
indicator

1-6.LED indicator -G875 MI drive board
1-6-2
LED 3 COMM
communication indicator
Program

1-6.Commnucation indicators –Incline board
1-6-3
Stride down indicators
Stride up indicators
LED 1 INCL_UP_Ｒ
Lit，right stride
increase
LED 3 INCL_UP_Ｌ
Lit，left stride increase
LED 4 INCL_DN_Ｌ
Lit，left stride decrease
LED 1 INCL_DN_R
Lit，right stride decrease

1-7. Electronic component specification -G875
Specification
Description
Note
Main power
Power source AC 110V / 220V
Generator power
source
AC generator
Max output WATT =250 W
Resistance control
Resistance circuit inside the MI drive board to control generator
Resistance range
LEVEL 1 –LEVEL 40
Speed sensor
Detecting circuit inside MI drive board to detect generator
Main display
Dot matrix
Data displays
CARDIO ADVISOR –Weight loss zone, Heart, CARDIO zone,
CALORIES / LEVEL / TIME / DISTANCE
Stride/min / stride length / total strides / HUMAN WATTS / WATTS TO THE GRID
Programs
MANUAL, INTERVAL, PLATEAU, RANDOM,
VARI STRIDE, FIT TEST, CUSTOM HR, WT LOSS/CARDIO
Heart rate
measurement
Wireless Polar T34 / HTR sensors
Languages
German, French, Spanish, English (US), English (International), Japanese
Fan
Fan, ( LOW, MIDDLE, HIGH )
Outside connections
USB cell phone charging, software upgrade ; CSAFE
Reserved functions IPOD video, Bluetooth
Stride
Electronically adjustable / DC motor / VR detected
Adjusting range: 17”- 29” (450mm-730mm)
1-7-1

2-1.Troubleshooting -G875
Faulty item
Description
Inspect and test procedures
Suggesting replacement parts
No power
Display is not lit up while
pedaling the bike
1.Check all wire connections
2. Check product fuse
3.Check power board
4.Replace MI drive board
1. Product fuse
2. Power board
3. MI drive board
No RPM
RPM display 0 while
pedaling the bike
1. Check the wire connection
2. Power on again to test. If display or MI drive
board problem will also cause RPM=0
3. Check to see if generator is turning
4. Replace MI drive board
1. MI drive board
No resistance
1.No resistance while
pedaling
1. Check to see if there is RPM signal on display
while pedaling the bike
2. Power on again to test. If display or MI drive
board problem will also cause no resistance.
3.Check drive belt or drive pulley
4.Replace MI drive board
1.Generator
2.MI drive board
No/bad
telemetry heart
rate reception
Wearing strap, however
no/bad heart rate signal
1. Check the Polar board wiring or replace it
2. Check interference sources, such as light or
speaker
1. Polar board
2. polar transmission
No/bad contact
heart rate
reception
No/bad HTR heart rate
signal
1. Make sure palms are holding on the sensors.
2.Check the HTR board signal status
3.Check HTR wiring problem
1. HTR board
2. HTR sensor
3. HTR wiring
Key not
function
properly
Key is not responding or
stuck
1. Check the location of the problem keys
2. Numeric key pad problem, check or replace the
membrane keys
3. If it is other key area, check or replace control
board.
4. Replace key switches
1. Soft key pad
2. Control board or control board
key board switch
2-1-1

No fan
Pressing <FAN> button and
fan is not functioning
1. Check fan wiring
2. Check fan voltage output on the control board
3. Replace control board
4. Replace fan
1. Control board
2. Fan
ERROR_1_1
Display showing
“ERROR_1_1” when power
on
1. System power on abnormal
2. Replace MI drive board or control board to test
1. MI drive board
2. Control board
ERROR_1_6
Display showing
“ERROR_1_6” when power
on
1. Power source voltage setting is not correct
2. Press Workout level<▲> & <▼> & <change
display> to set power source voltage
ERROR_2_1
ERROR_2_2
Display showing
“ERROR_2_1, ERROR_2_2”
when power on or
exercising
1. ERROR_2_1 means IGBT on MI driver over current
ERROR_2_1 means IGBT on MI driver too hot
2. Stop for ½ hour before use it again
3. Replace MR drive board if it occurs frequently
1.MI drive board
ERROR_3_1
Display showing
ERROR_3_1, when power on
1. Islanding effect
2. Check product power cord installation
3. MI drive board protective function; turn the
power on/off to use it again
4. Wait for a while before turn power back on
5. Replace MI drive board to test
1.MI drive board
ERROR_3_2
Display showing
“ERROR_3_2” when power
on
1. Voltage from power source is over the limit
110V 105–132 Vac
220v 184 –264 Vac
Stop using it until the voltage regulates
2-1-2

ERROR_3_3
Display showing
“ERROR_3_3” when power
on
1. Abnormal frequency from outside power source
2. Check power source frequency
3. Or replace MI drive board to test
1.MI drive board
ERROR_3_4
Display showing
“ERROR_3_4” when power
on
1. AC power mid-point error; this is for MI drive
board reference
2. Check to see if power source is abnormal
3. Replace MI drive board to test
1.MI drive board
ERROR_3_5
Display showing
“ERROR_3_5” when power
on
1. Power source grounding issue
2. Check power source grounding
3. Check grounding on the power cord
ERROR_4_3
ERROR_4_4
Display showing
“ERROR_4_3,4_4”when
power on
1. DC BUS abnormal on MI drive board
2. Check power source for issues
3. Or replace MI drive board to test
1.MI drive board
ERROR_5_1
ERROR_5_2
Display showing
“ERROR_5_1, 5_2” when
power on or exercising
1. ERROR_5_1means MI drive board is forced to warm
up
2. ERROR_5_2 means MI drive board is forced to shut
down <emergency stop>
3. MI drive board self-protective function; turn
power off/on to try again
4. Replace MI drive board if it occurs frequently.
1.MI drive board
ERROR_6_1,ERROR_6_2
ERROR_6_3
Display showing
“ERROR_6_1,6_2,6_3”
when power on
1. Abnormal generator
2. Check generator
3. Replace MI drive board to test
1.MI drive board
ERROR_7_INCLINE_L;
ERROR_7_INCLINE_R;
ERROR_7_INCLINE_L/R
Display showing”
ERROR_7_ICNLINE_R, or
L or L/R
1. Check incline wire connections
2. ERROR_7_R replace right incline assy
3. ERROR_7_L replace left incline assy
4. ERROR_7_R/Lreplace both incline assy
5. If replacement not working, then replace
incline board
1. Left incline assy
2. Right incline assy
3. Incline board
2-1-3

ERROR_8_1
Display showing
“ERROR_8_1” when power
on
6. Communication error
7. Check control board and program board
ERROR_8_2
Display showing
“ERROR_8_2”while
exercising
1. Communication error
2. Check control board and program board
3. Product self-protection from interference; turn
power off/on to test
Total distance display
Kph/mph/total
distance/total time/total
energy generated/software
version display
Press <CHANGE DISPLAY> for 3 seconds to enter
kph/mph setting and total distance, total time and
control board software version display
Model no. and voltage
setting
Press & hold “Workout level<▲> & <▼> & <change
display> keys for 3 seconds
Lubrication
Lubricate left & right
side of the incline motor
for maintenance
1.Press <ENTER>+<Calories> for 3 seconds to enter
lubrication sequence.
2-1-4