Picture 1: Disassembling the die-cast upper housing and bottom plate ^
- Unscrew the six 10mm screws (and washers) on the outside of the bottom plate
(two associated holes are visible on the picture above)
- Now the upper housing can be removed...
- Unscrew the six 14mm screws (and washers) on the inside of the bottom plate
- Now the bottom plate can be removed...
Picture 2 ^
Disassembling the display panel:
- Unscrew the six two 10mm screws (and washers) on the left and right in the
upper corners of the display plate...
Picture 3 and 4 ^
Disassembling the display panel:
- Unscrew the two 10mm screws (and washers) on the left and right side of the
display plate...
Picture 5 ^
Disassembling the display panel:
- Now the display panel can be removed...
Picture 6 ^
Power supply at the bottom of the keyboard
Picture 7 ^
Keyboard internals
Picture 8, 9 and 10 ^
The key caps can be removed very easy for cleaning
Picture 11 ^
Disconneting the front and PCB-assembly
- Unscrew the four 14mm screws (and washers) above the display (see: picture 1)
- Same procedure on the bottom side
- Now the PCB-assembly can be separated from the front assembly, although both
are still hard-wired
- Notice that the PCB sub-assemblies can be rotated against each other through a
hinge...
Picture 12 ^
Hard wired Backplane, individually wired.
Picture 13 ^
Removing the plastic upper protection of the PCB-assemblies
- Unscrew the six 8mm screws (and washers) of the plastic protection
PCB 1-32 are separated by insulating plastics and
are now in reach (each PCB number is readable on the upper plastic protection)...
Picture 14 ^
The 'Brains' of the calculator which can be found on 32 PCB's