Technogym spin trainer - There Is no Heart Rate Signal

SPIN TRAINER: Service & Maintenance Manual - rev. 2.0
Page 6.11
6.4. THERE IS NO HEART RATE SIGNAL
THERE IS NO
CARDIO SIGNAL
Is the supply voltage on the
receiver connector correct?
Is the supply voltage on
connector CN4 of the CPU board
correct.
Replace the receiver: see
paragraph 7.6.
Replace or repair cable
BK-7: see paragraph 7.6.
Replace the display CPU
board: see paragraph 7.4.
1
2
YES
NO
YES
NO
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:
(1) Place the tester probes between pins 1 (signal) and 3 (ground) (corresponding to the red and
black wires) of the 4-pin cardio receiver connector: the voltage should be +5Vdc.
(2) Place the tester probes between pins 1 (signal) and 3 (ground) (corresponding to the red and
black wires) of connector CN4 on the display CPU board: the voltage should be +5Vdc.