Circuit board

Abstract

A circuit board is used in common for the first electronic apparatus as the first configuration and for the second electronic apparatus as the second configuration, and the circuit board includes an area which is used in common for installing the first electronic device in installing the circuit board into the first electronic apparatus, and for installing the second electronic device in installing the circuit board into the second electronic apparatus, wherein the first electronic device is used only for the first electronic apparatus, and the second electronic device is used only for the second electronic apparatus.

1 - 10 . (canceled) 
   
   
       11 . A circuit board which is used in common for a first electronic apparatus having a first configuration and for a second electronic apparatus having a second configuration different from the first configuration, said circuit board comprising:
 a common area on the circuit board that is mounted with a CPU and a standard display device that are commonly used for the first and second electronic apparatuses; and   an optional area on the circuit board different from the common area on the circuit board, the optional area on the circuit board being mounted with one of a first electronic device that is unique to the first electronic apparatus and a second electronic device that is unique to the second electronic apparatus;   wherein an extension connector part is installed on the circuit board, said extension connector connects an extension unit that is removably attachable to the first electronic apparatus and the second electronic apparatus.   
   
   
       12 . The circuit board according to  claim 11 , wherein the extension connector part is installed substantially adjacent to both the install position of the second electronic device on the circuit board and the install position of the third electronic device on the circuit board. 
   
   
       13 . The circuit board according to  claim 12 , wherein the second electronic device is installed at a position in the area so that the distance between the extension connector part and the second electronic device is substantially the same as the distance between the extension connector part and the third electronic device. 
   
   
       14 - 15 . (canceled) 
   
   
       16 . The circuit board according to  claim 11 , wherein the extension unit is a connection apparatus that has a plurality of connectors for peripheral apparatuses. 
   
   
       17 . The circuit board according to  claim 16 , wherein the connection apparatus that has a width substantially the same as the width of the electronic apparatus is removably attachable to the back face of the electronic apparatus, and said connection apparatus has a projection part on which a connector being connectable to the extension connector part is located. 
   
   
       18 - 22 . (canceled)