I thought it would be a good idea to check the condition of my AF 4500 EFIS clock battery after finding an electronic caliper in my workshop with corrosive green stuff oozing out of the little coin-shaped battery.
I consulted the manual and removed the little cover on top of the housing under which the battery is supposedly concealed and was surprised to find nothing resembling a CR1225 battery. This prompted me to remove the internal battery access plate as well and of course this battery was not hard to find as it was glued to the cover. Alas, the location of the clock battery still evades me and I'm not prepared to dismantle the unit any further for fear of putting my grubby fingers where they're not supposed to wander. I did the same with my AF 3400 MFD and it looked just the same - i.e. no clock battery.
My AF4500 SN is 61402 and was calibrated on 9.28.2010. My MFD SN is 61693 calibrated on 10.20.2011.
Do you think you can provide some details on how to find and change the clock batteries?
I'm also interested to know what adhesive you used to glue the internal backup battery to the cover and the procedure used to remove and change it. Is the backup battery customised by AFS with those neat little connectors attached or is it a simple operation for us builders to to purchase the Varta battery and attach the connectors ourselves and reglue it to the cover?
Thanks
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