Replacement buffer battery in MC7xxx (Heidenhain)

Make a data backup before changing the buffer battery.(included PLC memory !!!)

When exchanging the buffer battery, remember:
 Switch off the machine and the TNC 640.
 The buffer battery may be exchanged only by trained personnel.
 When exchanging the buffer battery, ensure electrostatic discharge
protection. Improper handling can result in damage to the components or
assemblies due to ESD!

To exchange the battery:
 The buffer battery is on the main board of the MC
 Loosen the screws securing the rear housing cover of the MC
 Remove the cover
 The buffer battery is located on the upper edge of the PCB.

Battery type: 1 lithium battery, type CR 2450N (Renata), ID 315878-01

Loosen the screws securing the rear housing cover of the MC .
The buffer battery is located on the upper edge of the PCB.

Exchange the buffer battery; the new battery can be inserted in only one
position.