SYNCHRO EXCITE 2009: Service & maintenance manual - rev. 5.2
Page 6.37
Is the supply voltage correct at
the output of the display board?
Replace cable ELT-19
Replace the display board
5
YES
NO
A
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) Check the earthing of the machine using a tester to measure the resistance between 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).
(2) Check the connections, referring to paragraph 2.7. “Wiring diagrams”.
(3) Place the tester probes across pins 2 and 1 of connector J3 on the HS interface board. The
measured value should be +5 Vdc.
(4) As for point (2) but on patch connector 6.
(5) As for step (2) but across pins 1 and 6 of connector CN4 on the display board.
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