[Elecraft] KX1 appears dead after KXB3080 PCB installed... ...Help please!

[Shawn Morrow]

I have been using my KX1 for the past year or so.  This past weekend I
decided to install the KXB3080 option.  Performing the checkout step after
the KXB3080 PCB install failed normal operation!  Nothing works.  My KX1 now
appears to be mostly dead.  :-0

I am hoping the collective wisdom of the list can confirm or suggest other
possibilities I should check out to try to revive my KX1.  The other thing I
fear is multiple component failures.  Please help!  I am anxious to return
to the air!  (Believe it or not my KX is my station!)

Here is the run down:

The mods to the KX1 PCB (Part 1) went well and passed all the re-alignment
checks.

I installed the KXB3080 PCB fairly easily.  (I did have some problems
removing solder from the plated through hole for L7 near R2.  Ultimately I
also got solder in the adjacent G through hole as well.  I eventually got
these cleared.)

Upon performing the check out step towards the end of the this section (Part
II in the KXB3080 manual) I experienced the following:

	Current drain 36mA @ 13V - OK.
	LED lit up momentarily, 1 or 2 segments missing, then went dark. (!!)

Subsequent attempts to power up go like this:
	NO LED
	NO Relay Clicks at power up
	Current: 36mA @ 13V
	Buttons - unresponsive
	White Noise from earphones, volume works
	RF Gain and Filter have no affect on the audio
	(I did not check RF out.)

I double re-checked the install.  No anomalies were noted.

I opened up the trouble shooting section of the KX1 Manual:

	Section 00 - all ok

	Section 20 - all regulators are right on: 6V, 5V, 2.7V

	Section 26 - U1 Voltage Levels (w/i 10%) Measured @ 13V

          Pin    Spec  Meas      Pin     Spec    Meas
           1     5.0   5.0        15       0       0
           2     5.0   5.0        16       0       0
           3     4.6   5.0        17       0       0
           4     4.9   5.0        18       0       0
           5     4.9   5.0        19       0       0
           6     3.4   4.3 <<     20     5.0     5.0
           7     1.4     0 <<     21     5.0       0 <<
           8       0     0        22     5.0     4.7
           9      .8    .8        23     4.9     4.7
          10      .9    .9        24     5.0     4.8
          11       0     0        25     5.0     4.8
          12       0     0        26     4.7     4.8
          13     5.0   5.0        27     5.0     4.8
          14       0   5.0 <<     28     5.0     4.8

Measurements marked with "<<" are outside the 10% tolerance limit!!  Is it
fair to conclude U1 is toast!?!?

At this point I think I probably "fried" U1 during the install.  Since its
winter and pretty dry in doors I am guessing ESD got it.  This despite using
an anti-static mat, ...and wrist strap -- *most* of the time. :(

I am hoping the collective wisdom of the list can confirm or suggest other
possibilities I should check out before replacing U1.  The other thing I
fear is that perhaps other components were damaged in the process.

What say you??

Regards, Shawn Morrow
            W4SDM