[time-nuts] FTS-4060M/S24 ROM

Magnus Danielson magnus at rubidium.dyndns.org
Sat Jun 21 07:56:43 EDT 2008


From: Mark Sims <holrum at hotmail.com>
Subject: [time-nuts] FTS-4060M/S24 ROM
Date: Sat, 21 Jun 2008 10:48:36 +0000
Message-ID: <BLU125-W2159C523EE24CDD3BBD8F2CEA40 at phx.gbl>

> 
> 
> I am now fairly sure that the issues with my 4060 are due to a bad EPROM image or some other problem with the CPU card.  When I start an ALIGN sequence you see the beam current jump up to the same point as when you turn MOD off.  From then on,  nothing else happens.   I would assume that the ALIGN sequence should start scanning the control voltage and looking for the central peak.  I also do not get the ALIGN sequence at power on.  It appears that the code in the ROM that performs the ALIGN sequence is bad.  The rest of the code/cpu seems to be working properly since I can do a manual align and maniupulate all the front panel controls.
> 
> My EPROM is marked 05030-001 Rev -  My unit is serial number 255.  Does anybody have a dump of the 4060 ROM,  a copy of the ROM, a spare CPU board, etc?  Also can anybody with a 4060 tell me what happens during their ALIGN sequence?
> 
> Mark
> 
> BTW,  my EPROM is soldered (!) into a screw machine IC socket.  I will have to do some surgery to remove it.

Please hold on the EPROM. The trouble I had was that the DDS had gone bad.
The way to detect that was to look at the digital output of the DDS chip and
see if the '1's had full voltage or not. Replacing the DDS did the trick.
Getting a new DDS was not easy thought.

Cheers,
Magnus



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