HEIDENHAIN TNC 306 Service Manual - Manual (Page 109)

SERVICE MANUAL TNC 306/360
Page 102
HEIDENHAIN Service
19.7 Exchanging EPROMs
19.7.1 MOS-Protection
For the exchange of EPROMs MOS-protection is
indispensable, as otherwise the EPROMs could be
destroyed by static charge.
Moreover, all data should be backed up
(see section 19.1).
Observe the mark on the EPROMs (do not turn it by
180°); be sure not to damage any components
during the exchange. Use an appropriate tool.
After the software exchange, the LOGIC UNIT must
be marked with the new NC-software number (see
section 5.1). Moreover, an offset adjustment with
the code number should be carried out (see section
16.5.1). e.g. IC drawing punch
and insertion tool
19.7.2 EPROM Designation