17
PPC-S155T User Manual
Chapter 3
H
ardware
&
Peripheral
Installation
Figure 3.2 Connect the HDD to the HDD cable
3.3
Installing the SDRAM Memory Module and CPU
The panel PC's central processing unit (CPU) can be upgraded to improve system
performance. The panel PC provides one 478-pin ZIF (Zero Insertion Force) socket
(Socket 478). The CPU must be fitted with a heat sink and CPU fan to prevent over-
heating. The panel PC also provides two 200-pin SODIMM sockets which can accept
two DDR 266 SDRAM memory modules up to 2 GB
.
1.
Unfasten the screws on the right side for CPU and heat sink cover, then slide
the cover leftward until it detaches. Then find one 478-pin CPU socket.
Figure 3.3 Locating the CPU cover
2.
Locate the ZIF socket and open it by first pulling the lever sideways slightly
away from the socket, and then lift it vertically up to an angle of 90 degrees.
3.
Insert the CPU with the correct orientation according to the marks on the cor-
ners of the CPU and the mount.
4.
Slide the CPU gently inside. The CPU pins should insert easily. If they do not,
pull the lever up a little more and check to make sure that the pins of the CPU
correspond with the holes of the socket.
DO NOT USE EXCESSIVE FORCE!
Warning!
The CPU may be damaged if operated without a heat sink and a fan.
Caution!
Always disconnect the power cord from the panel PC when working on
it. Do not make connections while the power is on as sensitive electronic
components can be damaged by the sudden rush of current. Only expe-
rience electronics personnel should open the panel PC.
