Voltmeter lost after converting XC control board to support KIO2

[Ron Hahn (EI2JP)]

Lads,

I have one of the field test K2s (SN 79, current 2.04 firmware) that  
I've recently added a KIO2 board to.  To do this I needed to perform  
the mods for the XC control board to make it compatible with the KIO  
2 (which I have done).  This included cutting one trace to the MCU  
pin 25, adding two new jumpers and a .001 cap.

After performing the mod (and checking my work twice) I installed the  
KIO2 according to the instructions.  Changed the sidetone, checked  
the voltages, and even ran the test sequence with Hyper-terminal.  
All worked OK.  Radio works fine with TRX manager, which is also good.

My problem is that I have now lost the voltmeter, although the  
ammeter works.  So, consequently, I get LO BATT reminders every so  
often and the volts/current display shows 0.00V 0.3A.  !

Every other aspect of the radio seems to work EXCEPT the voltmeter.  
I checked for shorts, bridges, etc.. and could not find any.

Can anyone steer me in the right direction as I'm now at  a loss as  
to what I could have done to break this feature.

K2, Sn 0079, Firmware 2.04, XC control board
K160RX
KAT2
KBT2
KDSP2
KIO2
KSB2

Thanks for the help.

Ron EI2JP

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[n6wg]

Ron
Check the position of the slide switch.
It gets moved sometimes and the voltmeter
disappears.
Good luck and 73
Bob N6WG

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]]On Behalf Of Ron Hahn EI2JP
Sent: Sunday, April 30, 2006 7:45 AM
To: [hidden email]
Subject: [Elecraft] Voltmeter lost after converting XC control board
tosupport KIO2


Lads,

I have one of the field test K2s (SN 79, current 2.04 firmware) that  
I've recently added a KIO2 board to.  To do this I needed to perform  
the mods for the XC control board to make it compatible with the KIO  
2 (which I have done).  This included cutting one trace to the MCU  
pin 25, adding two new jumpers and a .001 cap.

After performing the mod (and checking my work twice) I installed the  
KIO2 according to the instructions.  Changed the sidetone, checked  
the voltages, and even ran the test sequence with Hyper-terminal.  
All worked OK.  Radio works fine with TRX manager, which is also good.

My problem is that I have now lost the voltmeter, although the  
ammeter works.  So, consequently, I get LO BATT reminders every so  
often and the volts/current display shows 0.00V 0.3A.  !

Every other aspect of the radio seems to work EXCEPT the voltmeter.  
I checked for shorts, bridges, etc.. and could not find any.

Can anyone steer me in the right direction as I'm now at  a loss as  
to what I could have done to break this feature.

K2, Sn 0079, Firmware 2.04, XC control board
K160RX
KAT2
KBT2
KDSP2
KIO2
KSB2

Thanks for the help.

Ron EI2JP

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[Don Wilhelm-3]

Ron,

Certainly we can help - the LO BATT indication is a sure sign that you
accidently bumped the switch on the of the Control Board - at the top just
to the right of center.  Just change the switch to the 'INT' position - easy
fix.

This is a common occurrance with older K2s, and was such a bother that the
version B K2s use a pluggable jumper rather than a switch.

73,
Don W3FPR

> -----Original Message-----
>
> My problem is that I have now lost the voltmeter, although the
> ammeter works.  So, consequently, I get LO BATT reminders every so
> often and the volts/current display shows 0.00V 0.3A.  !
>
> Every other aspect of the radio seems to work EXCEPT the voltmeter.
> I checked for shorts, bridges, etc.. and could not find any.
>
> Can anyone steer me in the right direction as I'm now at  a loss as
> to what I could have done to break this feature.
>
>

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