A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
Text excerpt from page 6 (click to view)
HOW TO REMOVE THE CONTROL PANEL (M-BOARD)
1. 2. 3. Remove the E-board from the cabinet with the M-board attached. Unclip by lifting the front of the M-board vertically. After servicing ensure all wiring is returned to its original position before returning the receiver to the customer.
HOW TO REMOVE THE A - BOARD
1. 2. 3. Disconnect the 5 leads from the A - board. Release the A and F boards securing brackets by pushing the clips in the direction shown in Fig.8, and remove the A - board by gently lifting vertically. After servicing ensure all wiring is returned to its original position before returning the receiver to the customer.