[1000mp] MP Problem

[Tod - MN]

Joe:

You posted earlier about a cable that would not seat. 

The cable you referenced was on the RF board and goes to the Control board.
I might think that if that cable were not correctly seated and gripped by
the connector there may be one or more of the lines that is not making
properly. 

I am not where I can look at the MP Service Manual but perhaps someone else
on the reflector can look at theirs and see if  one of the lines in that
cable might cause the problem you mention. Meanwhile, I suggest that you go
back through all of the steps you took in the RF board operation and make
sure that the correct RF cables are plugged into the correct jacks. Then
very carefully reseat the two cables at the left side of the board (viewed
from the front of the MP). I am doing this from memory, but I think there
was a possibility to mix up at least on pair of RF cables on the RF board.

You mention that your alterative is to send the unit away for repair so I am
guessing that you do not have test equipment that would allow you to trace
circuit continuity or the path of injected signals which might provide some
additional information. Without a Service Manual it probably would be a
difficult thing to do I think.

Tod, KØTO



> -----Original Message-----
> From: 1000mp-bounces at mailman.qth.net 
> [mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Joe Staples
> Sent: Monday, October 24, 2005 7:25 PM
> To: 1000MP Reflector
> Subject: [1000mp] MP Problem
> 
> I need help ... My 1000MP has gone silent ... no RF in ... no 
> RF out.  I can't hear any signals nor can I get any power output.
> 
> I completed the installation of the INRAD Key Click mod in my 
> 1000MP and then added the Roofing Filter (after removing the 
> 70 MHz IF mod).  After a thorough check of all connections in 
> and around the RF and IF circuit boards, I put the covers 
> back on, powered up and set Menu 9-1 back to 11 (I had 
> dropped it to 9 after installing the 70 MHz mod). However, 
> neither the receive or transmit appear to be working.  I can 
> hear NOTHING, and I can get no RF power into the antenna.  
> All controls, knobs, buttons, etc. seem to work as they 
> should.  I have done a CPU reset and then gone through each 
> item in the Menu to see that the settings were correct.  I 
> can find nothing amiss among the front panel control settings.
> 
> I went back and rechecked all of the pc board coax connectors 
> to assure that they were seated fully, and all of the various 
> other connectors to see they firmly seated.  I also changed 
> the small coax cables going to the Roofing Filter board so 
> that it was no longer in the circuit ... which no effect.  
> I've swapped the antenna between both antenna connectors.
> 
> While I can possibly understand why I might have a receive 
> problem after modifying both the RF and the IF boards (adding 
> key click components), I can't see where the transmit could 
> have gotten fouled up.
> 
> If anyone has any suggestions, I appreciate hearing them ... 
> otherwise, I have to box up the rig and ship it off for 
> service (right before SS CW no less).
> 
> Joe, W5ASP
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