Stage 2, Spectra Radio Disassembly  
   

 
  Remove the two black torx head screws that hold the top cover in place and set the items aside.

 
  Carefully pry up on the memory board shield cover.  Lift just enough to disengage the detent clips that secure the lid.

 
  Pry up all around the edges until the cover comes free, and set it aside.

  You can see the memory board fits inside the shield with very little tolerance.  So be careful not to damage the board by shoving your prying tool way up under the lid.


 
  The memory board is held in place via a set of header pins inserted into it's female counterpart on the Command Board.

  Carefully pry up on the command board in a few places along that header area to free the board from the connector on the board below.


 
  Once the Memory Board becomes free, pry up towards the middle of the connector and the board will lift free.  Set it aside.

  Static sensitive CMOS devices are present on this board, handle accordingly.


 
  A view of the Command Board with the Memory Board removed.

  Note the torx head screw in the middle of the Command Board that was previously hidden by the Memory Board.

  Remove that screw and all the other torx head screws that secure the Command Board in place and set them aside.


 
  Near the rear left corner of the Command Board is a heat sink retaining clip that holds the 3 transistors against the chassis casting.  Pry up gently on one side of the clip.

 
  Pry up on the other side of the clip and remove it.  Set is aside for use later.

 
  Turn the radio over to expose the bottom.  Remove the two black torx head screws securing the bottom cover and set them aside.  Set the cover aside as well.

  Remove the four black torx head screws that secure the PA Deck cover and set them aside.  Set the cover aside also.


 
  Using the plastic handles provided, remove the RF Board shield and set it aside.  Remove the PA Deck shield and set is aside as well.

 
  Turn the radio up and stand it on it's front as shown.  Near the front right corner of the PA Deck you will find a larger black torx head PA Deck retaining screw.  Remove it as shown in the picture.

  There may be a small RF shield cover in place, preventing access with your screwdriver.  If so, remove it.

  (Note the sides of the shield on either side of the screwdriver's shaft.)


 
  Turn the radio around 180 and locate the other large torx head PA Deck retaining screw and remove as shown.

 
  Seperate the PA Deck from that Radio Chassis Casting to expose the interconnect cabling.

 
  Carefully pull the two RF connectors from their respective boards to allow the PA Deck to be removed further, as show in the picture.

 
  Remove the ribbon cable and connector from the Chassis Casting and set the PA Deck aside.

 
  Lay the radio on it's bottom, as shown, and carefully pull up on the Command Board.

  As you can see in the picture, there is a set of interconnect pins that mate the Command Board on top, to the RF Board below.  This may or may not come out with the Command Board.

  The Command board has a heat sinked device on the left side, note the heat sink paste on the left side of the chassis. 

  Be careful not to get that all over yourself, it's messy.


 
  Remove the interconnect and set it aside.

 
  Rotate the chassis upwards so you can look into the front of the radio.  Note the coax cable plugged into the front of the RF Board.

 
  The cable plugs into the front left corner of the RF Board. 

  Note the shield cover on the left side of this picture.  Under that cover is the VCO Section.  There is no reason to tamper with that at all.  There are also a couple of coaxial interconnect cables under there that are difficult to work with. 

  All the screws must be removed along with that cover, but leave the board alone!


 
  Carefully unplug the cable from the RF Board.

 
  Remove all the torx screws on this side of the radio and set them aside, along with the VCO Section cover.

 
  Carefully pry up on the edge of the VCO board, as shown, to unplug it from the RF Board.

  CAUTION!  These pins are very delicate and easily bent!


 
  Lift the VCO Board up as shown, but no further.  Leave it as shown so the interconnect cabling beneath the board remains in place.

 
  Carefully tilt the RF Board up and lift it out, avoiding the interconnect pins on the VCO Board.
  Set the chassis aside.

  Pictured are the three boards we will be working with.

  At the top is the PA Deck.  On the left is the Command Board, and on the right is the RF Board.

   
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