Buffer battery, Exchange buffer battery, Buffer batteries and accumulator defective – HEIDENHAIN TNC 306 Service Manual User Manual
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SERVICE MANUAL TNC 306/360
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HEIDENHAIN Service
8.6 Buffer Battery
The buffer battery is the voltage source for the
program memory if the machine is switched off.
If the error message
EXCHANGE BUFFER BATTERY
appears, the batteries must be exchanged within
one week.
The buffer batteries are located behind a screw
fitting in the power supply of the LE 360. To
exchange open the LE by undoing both snaps.
In order to protect the program memory of the
TNC 306/360, a capacitor (located on the
processor board) is used in addition to the
batteries. Thus, the line voltage may be switched
off during battery exchange.
Without batteries the capacitor is capable of
maintaining the memory contents for about one
day.
3 AA-size batteries,
leak-proof,
IEC designation "LR6"
*
Only when the TNC is switched on is
the capacitor being charged!
Capacitor
Processor Board