Matrix U7xe Service Manual download pdf (Page 42)

8.14 TROUBLESHOOTING - HEART RATE ISSUES

CHAPTER 8: TROUBLESHOOTING

HEART RATE FUNCTION DOES NOT WORK OR IS READING INCORRECTLY

POSSIBLE CAUSES:

1) The HR grips are not hooked up correctly.

2) The HR grip wiring is damaged.

3) The console or HR board is not properly grounded.

4) The console, HR board, or wiring between are bad.

SOLUTION:

1) Perform a DC Voltage test on the HR grips.

a. With one prong of a multi meter on each of the plates on one side of the HR grip set (Figure A), a voltage reading of between .5 and 2.0

should be seen. If the reading is correct, the issue is not with the HR grips or grip wiring.

b. If the reading is not correct, remove the screws holding the halves of the HR grip together and check the connection of the wiring to the

grips (Figure B).

2) Remove the console from the unit and verify continuity of the HR grip wiring. With a multi meter set for ohms, place one prong on the HR grip

wiring coming up the console mast (Figure C), and the other on the appropriate plate (match red with red and white with white).

a. An ohm reading of less than 1 should be received. If it is higher, replace the HR grip wiring.

3) Perform a continuity check on the console (See Service Bulletin - Continuity Test on Matrix Bikes).

a. Once the console continuity is confirmed, perform a continuity check on the HR board ground wire. With a multi meter set for ohms, place

one prong on the HR board ground wire (Figure D), and the other on the console ground wire. An ohm reading of less than 1 should be received.

If it is higher, replace the HR board.

4) If all the troubleshooting listed above has been performed, and the unit still has HR issues, replace the HR board.

a. If the HR board does not resolve the issue, replace the console.

FIGURE D

FIGURE B

FIGURE C

FIGURE A

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Matrix U7xe Service Manual Page 42