Technogym Synchro Excite 500SP Service Maintenance Manual page 91

SYNCHRO EXCITE Class & Trend: Service & maintenance manual - rev. 2.0
Replace the display board
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
Check the earth connection of the machine using a tester to measure the resistance between
(1)
the ground pin on the power supply cable and the ground node to which the receiver is
connected inside the display. The value must be less than 1 Ω (Ohm).
Check the connections, referring to paragraph 2.7. "Wiring diagrams".
(2)
Place the tester probes across pins 2 and 1 of connector J3 on the HS interface board. The
(3)
measured value should be +5 Vdc.
As for point (2) but on patch connector 6.
(4)
As for step (2) but across pins 1 and 6 of connector CN4 on the display board.
(5)
NO
Is the supply voltage correct at
the output of the display board?
A
5
YES
Replace cable ELT-19
Page 6.37