HEIDENHAIN TNC 306 Service Manual - Manual (Page 95)

SERVICE MANUAL TNC 306/360
Page 88
HEIDENHAIN Service
19. Exchange Instructions
19.1 General Remarks
19.1.1 Equipment Required
1 external data medium, e.g. FE 401/B or personal computer with connecting cable
1 tool set (screw driver, socket wrench etc.)
1 MOS-protection device (only required for exchanging boards or EPROMs)
19.1.2 MOS-Protection
If the processor board, the PLC-board or EPROMs are to be exchanged, a MOS-protection
is definitely required, as otherwise MOS-components on the board or EPROMs may be
destroyed.
*
Note:
Avoid any unprotected handling and any contact of the boards or EPROMs
with statically charged objects (packing material, storage, ......)
MOS-Protection
R = 1M Ω
MOS-protection mat
bracelet
potential compensating line
with protective resistor
not required, if the MOS-protection
GROUND
(e.g. protective wire socket)
mat lays on the machine table
19.1.3 Software Compatibility
Exchange units (complete LOGIC UNIT) are generally supplied with the latest software
version.
Exchange boards, however, are always supplied without software and without
software-enable module.
For this reason, the EPROMs and the software enable module of the defective board must
be inserted into the exchange board at site. (Before sending us exchange boards for repair,
always remove the EPROMs and the software enable module!)