Thank you for your shop manual! Your help was very useful - the device is repaired! Once again - Thank you! I wish you a successful business! Edward (Russia).
Text excerpt from page 13 (click to view)
1-4.Replacing the CPU
1. Removing the CPU
1 Insert a screwdriver tip into the groove as shown and slant it in the direction of the arrow. NOTE: Do not use screwdrivers having a large tip than the width of the groove. Otherwise, it may cause the groove to be damaged. 2 The base under the CPU moves slightly in the direction of the arrow and the lock is released. 3 The CPU can be removed upward.
2. Installing the CPU
Attach the CPU while aligning the cut-out with this position.
1 Insert all pins of the replacement CPU into the holes of the base and push the CPU in the direction of the arrow. 2 Insert a screwdriver tip into the groove as shown and slant it in the direction of the arrow. 3 The base under the CPU moves slightly in the direction of the arrow and the CPU is locked.
NOTE: The DIP switch on the MBX-39 board (main board) is set to match with the CPU (8-759-697-16) that is used in this computer. (The upper position where ON indication is shown is the ON position . The lower position is the OFF position.)