Need a schematic of dash wiring.

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Have a GREAT Day

Tom KS5X@...





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Tom, That's not good...
( This is now in addition to low tx power, & inoperative in-built watt meter?? )

Assuming you have not got anything connected to the GPS header & the plug on the end of any key plugged into the QCX is a stereo TRS type
I don't think you are going to get any more information other than what's in the build manual. schematic, and write up of theory of operation.
Dot & Dash share the GPS interface pins and straight into IC2 MCU, but you need do your own fault-finding to prove it's NOT something external to the MCU before you finally order !

It's almost* guaranteed not to cure the low power issue.....

report back on what you find

Alan

A high resolution schematic is available on QRP Labs' site:?

A screen grab of the paddle jack and connections taken from the lower-right section of that image:


--Al

Tom

You may need to use your dvm to relate schematic to the board. It may also confirm where a short may be. Look and check continuity carefully. I can't remember which project I experienced this, it happens.

Curt

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Thanks for your suggestions, that is what I have been doing and everything seemed OK. In desperation I tried replacing the 14 pin IC, guess what ?

Everything works normal, problem solved, thanks again for your advice.

Tom

Tom

You may need to use your dvm to relate schematic to the board. It may also confirm where a short may be. Look and check continuity carefully. I can't remember which project I experienced this, it happens.

Curt

-- 
Have a GREAT Day

Tom KS5X@...

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Thanks and I have been using the schematic in the installation instructions only used screen magnification. Any way thanks to trouble I had in the past I had a spare IC handy replaces the one sending constant dashes and everything now works OK! Will bookmark the HiRes site just the same. Have a great day.

Tom

A high resolution schematic is available on QRP Labs' site:?

A screen grab of the paddle jack and connections taken from the lower-right section of that image:


--Al

-- 
Have a GREAT Day

Tom KS5X@...

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Thanks for your suggestions, I've been checking all possible causes with a DVM and found everything OK. After much frustration I changed out the IC, fortunately I had a spare and everything cleared up. Thanks again for your input.

Tom, That's not good...
( This is now in addition to low tx power, & inoperative in-built watt meter?? )

Assuming you have not got anything connected to the GPS header & the plug on the end of any key plugged into the QCX is a stereo TRS type
I don't think you are going to get any more information other than what's in the build manual. schematic, and write up of theory of operation.
Dot & Dash share the GPS interface pins and straight into IC2 MCU, but you need do your own fault-finding to prove it's NOT something external to the MCU before you finally order !

It's almost* guaranteed not to cure the low power issue.....

report back on what you find

Alan

On 22/08/2018 01:11, Tom Gundlach wrote:

Need a schematic of dash wiring.

-- 
Have a GREAT Day

Tom KS5X@...

Oops, didn't see your reply soon enough. Glad you've got it fixed!
--Al

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OK Think I'll post a separate posting listing what I found.

Oops, didn't see your reply soon enough. Glad you've got it fixed!
--Al

-- 
Have a GREAT Day

Tom KS5X@...