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EX500 and EX600 MFD Synchro Heading Inop

On the Synchro Valid input R1 and R2 must be installed or the EX500/600 will sustain damage.

If the unit is receiving HDG data, but the HDG is jumping all over the place check:

400Hz output of the A/C supply

Check reference Hi and Low compared to X,Y,Z inputs. The reference and signal input wave-forms must be identical.

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  • 07-Feb-2019