Brother International T-8752C Instruction Manual - English - Page 92

contact the place of purchase., Possible cause

Get Brother International T-8752C PDF manuals and user guides View all Brother International T-8752C manuals
Add to My Manuals
Save this manual to your list of manuals

Page 92 highlights

14. TROUBLESHOOTING Error code E701 Abnormally high power supply voltage. E705 Abnormally low power supply voltage. E710 Motor overcurrent. E791 Solenoid overcurrent. Possible cause ・ Does the power supply voltage match the control box voltage specifications? Check that the voltage matches. ・ Is the power supply voltage abnormally high? Check the power supply voltage. ・ Problem with control box. Replace the control box. ・ Is the power supply voltage abnormally low? Check the power supply voltage. ・ Problem with control box. Replace the control box. ・ Is the electrical equipment connector inside the control box disconnected? Press the power OFF switch, and then check that the drive PCB connector is connected to connector P4 on the main PCB. ・ This is displayed if the machine pulley moves stiffly when it is turned by hand, or if the sewing machine locks up and an abnormal current is flowing. Press the power OFF switch, and then turn the machine pulley by hand and check that it turns easily. ・ This is displayed if there is some problem with the motor and an abnormal current is flowing. Replace the motor. ・ Problem with control box. Replace the control box. ・ This is displayed when there is overcurrent in any of the solenoids (thread trimming, thread wiping, quick reverse or presser lifter). Check the resistances of the solenoids. ・ Problem with main PCB. Replace the control box. E901 ・ DIP switch No. 4 inside the control box is set to ON. Press the power OFF switch and set DIP switch No. 4 to OFF. Page * * ** * ** * * ** ** * ** * If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the place of purchase. 83 T-8421C, 8422C, 8452C, 8722C, 8752C

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
T-8421C, 8422C, 8452C, 8722C, 8752C
14. TROUBLESHOOTING
83
Error code
Possible cause
Page
E701
Abnormally high
power supply
voltage.
・
Does the power supply voltage match the control box voltage specifications?
Check that the voltage matches.
・
Is the power supply voltage abnormally high?
Check the power supply voltage.
・
Problem with control box.
Replace the control box.
*
*
**
E705
Abnormally low
power supply
voltage.
・
Is the power supply voltage abnormally low?
Check the power supply voltage.
・
Problem with control box.
Replace the control box.
*
**
E710
Motor
overcurrent.
・
Is the electrical equipment connector inside the control box disconnected?
Press the power OFF switch, and then check that the drive PCB connector is
connected to connector P4 on the main PCB.
・
This is displayed if the machine pulley moves stiffly when it is turned by hand, or if
the sewing machine locks up and an abnormal current is flowing.
Press the power OFF switch, and then turn the machine pulley by hand and
check that it turns easily.
・
This is displayed if there is some problem with the motor and an abnormal current is
flowing.
Replace the motor.
・
Problem with control box.
Replace the control box.
*
*
**
**
E791
Solenoid
overcurrent.
・
This is displayed when there is overcurrent in any of the solenoids (thread trimming,
thread wiping, quick reverse or presser lifter).
Check the resistances of the solenoids.
・
Problem with main PCB.
Replace the control box.
*
**
E901
・
DIP switch No. 4 inside the control box is set to ON.
Press the power OFF switch and set DIP switch No. 4 to OFF.
*
If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem,
contact the place of purchase.