2-3
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01
2.2
Processor
Pentium 75/90/100/120/133/166/200 MHz with integrated cooling unit in ZIF
socket.
1. First remove the cooling unit which is fixed using a lifting lever.
2. Then push the lever in the direction of the arrows (1) and swing it up-
wards as far as it will go (2).
3. Lift the old processor out of the slot (3).
4. Put the new processor in its socket and make sure that the marks on top of
the processor have the exact position (4) as indicated on the slot (A).
!
Caution
The marks on top of the processor may be covered by the cooling unit. In
this case, use the marks inbetween the pin rows on the outside of the
processor.
5. Swing the lever upwards until it clicks into position (5).
6. Fix the cooling unit using the lifting lever.
7. If necessary, change the settings for processor frequency (switch S1, S2
jumper X34).
!
Caution
Operating a processor at a higher frequency than the maximum permissible
frequency may result in destruction of the processor, data loss, or data
corruption.
A
3
2
1
4
5
Figure 2-1 Upgrading the processor
Recommended
Processors
Replacing the
Processor
Motherboard