Technogym Synchro Excite 500SP Service Maintenance Manual page 88

Place the tester probes across pins 1 and 8 of connector CN1 of the TGS reader. The
(1)
measured value should be +12 Vdc.
As for step (1) but across pins 1 and 9 of connector CN8 on the display board.
(2)
Use the serial communications test described at paragraph 6.2.1.3 "Serial Ports Test".
(3)
If you replace Display board/Brake board, check that its SW version is updated, otherwise
install the last version.
Pagina 6.34
SYNCHRO EXCITE Class & Trend: Service & maintenance manual - rev. 2.0