5.1.3  - CPU  Board 
To  remove  the 
CPU 
board,  it  is  necessary  to  discqnnect  all 
cables  connected  to  the  CPU.  There  are  4  flat  ribbon  cables  to  be 
removed:  1 from  the 
CGP 
board  (cehter· board),. one  from  the  Channel 
board  (right-hand  side)  and  two  ribbon  cables 
that 
c,?nnect  to  the 
inside  edge  of  the  CPU  (these  two  cables  come  from  the  Control 
Panel  and  Keyswitch  boards).  Next,  remove  the  two  brown  power 
connectors  and  the  MIDI  cable  located  next  to  the  rear  panel 
on 
the 
CPU.  Now  it  is  necessary  to  remove  the  4  fastening  nuts  securing 
the  four  1/4 
inch· phone  jacks  to  the  rear  panel.  Then  remove  the  13 
phillips  head  screws  which  mount  the 
CPU 
to  the  slide  chassis. 
It 
is 
necessary  to  have  a  very  short. screwdriver  to  remove  the  2  screws 
located  at  the  inner  edge  of the  board. 
5.1.4  - CGP  Board 
To 
remove  the  CGP  board,  it  will 
be 
necessary  to  remove  6 
cables.  Two  from  the 
CGP 
board 
to 
the  Channel  board,  two  from  the 
CGP 
board  to  the 
CPU 
board, 
one 
from 
the  power connector 
to 
the 
CGP 
board  and  one  long  flat  ribbon  cable  that  goes  across  the 
CGP 
board 
from  the  CPU 
to 
the  Channel  board.  Once  the  cables  have  been 
disconnected,  remove  the 
13 
phillips  head  screws  holding  the 
CGP 
to 
the  chassis.  It  is  necessary 
to 
have  a  very  short  screwdriver  to 
remove  the  2  screws  located  at 
the 
inner  edge  of  the  board. 
Kurzwell 250 Service Manual, Chapter 5 
5·3