18 – 258 HEIDENHAIN Service Manual iTNC 530 HSCI
Exchanging the
buffer battery
of the MC 6222
To exchange the buffer battery of the MC 6222, proceed as follows:
8 As a precaution back up the non-volatile PLC markers and words in the RAM on the data medium.
--> See ”Non-volatile PLC markers and words” on page 11 – 134.
8 Back up the data. --> See ”Data backup” on page 14 – 181.
8 Switch off the machine, take precautions against restart, ensure that the equipment is free of
potential.
8 Open the console.
8 Screw off the rear cover plate.
8 Remove the cover plate.
8 Remove the old buffer battery.
8 Insert the new buffer battery.
Due to the non-symmetric shape of the battery there is only one possibility of inserting.
Battery type: Lithium battery, type CR 2450N (Renata), ID 315878-01
Housing parts of the MC 6222 need to be removed to replace the buffer battery.
The device must not be under power; observe the safety precautions.
---> See ”Safety precautions” on page 2 – 15.
Replacing the buffer battery may be easier, if you dismount the entire MC 6222 from the console.
In this event, label all cables before you disconnect them.
Take ESD-preventive measures (See ”ESD protection” on page 29 – 520) and work with great
care!
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