[Elecraft] K2 #6155 Resistance check for Assembly II - U6 pin

[agunn at nbnet.nb.ca]

Don

Thanks for the advice. I will do a methodical unpowered investigation. 

Arthur VE9BP
> 
> From: Don Wilhelm <w3fpr at earthlink.net>
> Date: 2007/07/06 Fri PM 03:28:46 EDT
> To: Arthur Gunn <agunn at nbnet.nb.ca>
> CC: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K2 #6155 Resistance check for Assembly II - U6 pin
>  9	low value
> 
> Arthur,
> 
> The 8B line (Measured at U6 pin 8) is a voltage rail, so you should 
> resolve the low resistance reading before you apply power.
> 
> Be certain all the active devices are installed the right way around 
> (the parts placement diagram at the end of the manual is handy for 
> that), and check the value of any resistors connected to that voltage 
> rail before proceeding.

> 
> Sorry I can't simplify it any more than that - you will just have to 
> hunt until you find it - voltage rail problems are like that.  If you 
> are brave and have lots of parts, you could just plug it in and see what 
> overheats or smokes, but that is not in any way a recommended procedure, 
> do it at your own peril.
> 
> 73,
> Don W3FPR
> 
> Arthur Gunn wrote:
> > Hi builders
> > 
> > Progress seems fine except for a 36 ohm value measured at U6 pin 8
> > instead of >100 ohms (page 59). What values have you seen there? My
> > measurements were made with an Ideal auto-ranging DMM.
> > 
> > I see at least 8 paths plus active devices to be considered for
> > troubleshooting if 36 ohms is not a commonly seen resistance reading.
> > The other values in the table of resistance checks are as specified.
> > 
> > I look forward to hearing your experiences at this resistance
> > checkpoint.
>