Technogym spin trainer Maintenance Manual page 29

SPIN TRAINER: Service & Maintenance Manual - rev. 2.0
(1) Check whether the black and violet wires, which connect the alternator to pins 1 and 5 of CN2
on the alternator interface board, are correctly connected.
(2) Place the probes of an oscilloscope between the violet wire and the alternator ground. When
the speed is varied at 0% incline, the waveform frequency should vary as shown in the table
below:
The signal at the alternator output and on connector CN2 of the alternator interface board
should be as shown below:
while on connectors CN1 of the alternator interface board and CN1 on the CPU board the
following square wave should be obtained:
(3) As for step (2) but with the oscilloscope probes between pins 1 (probe) and 5 (ground) of
connector CN2 on the alternator interface board.
(4) As for step (2) but with the oscilloscope probes between pins 5 (probe) and 3 (ground) of
connector CN1 on the alternator interface board.
SPEED FREQUENCY
(Km/h)
10
15
20
25
30
(Hz)
81.6
122
164
204
245
Page 6.9