SPORTS ART C51R, Руководство по ремонту, Страница: 61 / 83

C51R/C51U Bike Repair Manual (Electronics) - Troubleshooting
ERR7 Operation
(Continued from 6-3-1)
Order Part Operation
3 Cable 1. VR output voltage travels the cable to the drive board.
4 Drive Board 1.The drive board relays the VR voltage to the display.
5 Data Cable 1. VR output voltage travels the data cable from the drive board to the display.
6 Display Board
1.The main program IC detects the VR voltage. VR voltage corresponds to motor position.
Motor movement changes the location of magnets inside the flywheel, which changes
resistance. If there is no VR voltage or if the VR voltage exceeds the range, the display lacks
information to command motor action, so ERR7 appears.
Circumstance of Malfunction
1. Turn on unit power. Display shows “ERR7”.
ERR7 Troubleshooting
Order Part Procedure
1 Drive Board 1. Measure power supply to the VR across the black and blue wires. Normal reading: 5 VDC.
If not, inspect the drive board. See 6-1-1. Replace it if receiving but not outputting power.
2 VR 1. Measure VR output across the white and blue wires to the drive board. Normal reading:
0.4-4.6 VDC. See 6-3-3. If not within this range, replace the motor/VR assembly.
3 Data Cable 1.Inspect the data cable and its connections on the drive board and the display board and at
the hub board on C51R. Also, make sure that VR wires are in place properly.
4 Display Board 1. Inspect whether the main program IC U1 is in place properly. See 6-2-4.
6-3-2