Problems of adb connector of an Apple
Extended Keyboard II
As usual, I cannot be responsible for any damage to
your machines when you will experiment the following
- bad electrical connections: mouse freezes. But if one
shakes the cable, the problem disappears.
- I change the cable but still the same phenomena.
-> sot the connector may be the culprit.
1) shutdown the machine (ADB is not USB and does like hot
interruption of connection).
2) disconnect the cable and the mouse.
3) a large and clean space to work ;-)
The blue arrow shows the screw to be removed...the yellow
one, the dead connector. Then, the keyboard is simply
The tool in the foreground will be used later.
On the connector side (yellow arrow), the electronic
board has to be vertically lift up. Do the same thing on the
After removing it, a simple ohmeter's test shows that...
the plug itself was the problem :-(
The keyboard has to be removed from its shell by
unclamping it at the spots shown by the yellow arrows. Take
care, when the metallic part has been removed, that the
locking clamps do not close again and damage the electronic
In its inferior part, the keyboard is fixed by lugs
(yellow arrow). So, we have to slide it to the rear to
Freed... but need to be cleaned :-)
Now the connector itself. We can unweld it: yellow arrows
point the weld spots of the shell in which the connector is
fixed, the blue ones the connector's weld spots.
(Picture displays the new weld spots I made)
The connector: very small.
The ruler also helps as a lever to extract some welded
pieces without damaging them.
The connector's shell removed: we have to extract the
black piece (yellow arrow) from both its sides: be carefull
not to damage the connector's pins.
The shell and the plastic piece which acts as a guide for
the connector's pins. A good time is coming when we will
have to reassembly the whole stuff!
Now, we are using the tool seen sooner... to tighten up
the contact blades pointed by the yellow arrows.
Same operation, but a more detailled picture.
(the inner diameter of the plug is around one square mm).
As usual, follow these instructions in a reverse order to
rebuild the connector.