Best K42 Manual do Utilizador descarregar pdf (Página 7)

K42 Hardware Update Instructions - Rev 1.0 K1EL

K42 Hardware Upgrade Guide Version 1.0 May 6, 2011 Page 7

10) Now sneak in with a soldering iron and solder two pins at each end of the connector. I

recommend soldering the fourth pin in from each end.

11) After the solder joints have cooled (this is important) remove the PC board assembly from

the enclosure base and solder the remaining connector pins from the bottom of the

board. Solder one pin at a time alternating end to end. Go slow, allowing each joint to

cool before doing the next. A big risk here is overheating the board which will cause

warpage and affect the display alignment.

12) After finishing this step, power up the board and you should see a nice backlit display.

You will probably need to tweak the contrast control since this display will have a different

set point for best contrast. Note that there is no way to turn the backlight off; this feature

is only supported in the new K42.

13) Now you can reassemble the logic board back into the enclosure. Make sure you use the

correct plastic spacers; the new spacers are slightly longer than the originals.

14) The last step is to remove the Rev A PsoC IC from location U3 and replace it with the

one provided in the upgrade kit. With this installed you will see PvB displayed in the K42

signon screen. Note that the picture on page one shows a picture of the Rev C assembly

with PsoC Rev C. You will see K42vA, WkvA, and PvB in your signon display.

The new PsoC controller will provide much better CW copy but is still subject to the same

basci limitations as the original, that being noise sensitivity and inability to copy senders

with poor fists. The gain of the new PsoC is higher that the previous version and the

spacing adjustment is now more limited.

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