Operating Principle; Electronic Components; Generator; Voltage Converter (Transformer) - Technogym Group Cycle D92 Technical Service Manual

New Group Cycle (D92):
Technical Service Guide - Rev. 5.1
3.

OPERATING PRINCIPLE

3.1 ELECTRONIC COMPONENTS

3.1.1 GENERATOR

It is a 3-phase generator that supplies power to all the electronic components when the rotation
speed is at least 40 rpm.
It provides the RPM signal to the watt sensor board and to the display.
It provides current to the voltage converter.
The statoric resistance between two of the three phases must be approx. 9 Ohm.

3.1.2 VOLTAGE CONVERTER (TRANSFORMER)

The voltage converter receives the high voltage from the generator and transforms it into low volt-
age (5.5 V) to power all the device electronics.
This board does not have any software. Therefore, if it is replaced no software needs to be loaded.
There are two LEDs on the board:
- Yellow: blinking when it receives the RPM signal from the generator.
- Fixed green when 5.5 Volt have been generated.

3.1.3 WATT SENSOR BOARD

The Watt Sensor board receives the information regarding the brake magnetic field (changes based
on the position of the brake knob); it also receives the speed signal (rpm) from the generator. It uses
this information as well as an algorithm loaded in its memory to calculate the watts developed by
the user and transmits this to the console.
The board has the SN of the device stored in its memory and transmits it to the console each time
the device is turned on.
When calibrating the brake, the Watt Sensor board MUST NEVER BE TURNED OFF, as the data
will NOT BE SAVED. Carry out brake calibration when powering the display with a PC or a power
bank to keep it from turning off.
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