Re: [time-nuts] HP 5062C service manual, schematics, or power supply troubleshooting tips

2008-08-19 Thread Tim Schulz 
Hi Dave - thanks for the note.  The plastic eject handle was completely 
brittle and fell apart on removal, but the PCB still seems pretty 
solid,  I have seen worst from early ceramic decoupling cap failures.  
This probably means that there are lots of 5062s out there without 18v 
supplies. Are people adding fan cooling to their systems to extend the 
life of the hardware?

tim


Dave 'SqueezeBox' Carlson wrote:
> very typical of the 5062C regulator board. IF run long enough, the PCB can 
> actually de-laminate or crumble when removed. Run very hot and little 
> circulation in the honey-comb structure.
>
> Dave
>   


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Re: [time-nuts] HP 5062C service manual, schematics, or power supply troubleshooting tips

2008-08-19 Thread Dave 'SqueezeBox' Carlson 
very typical of the 5062C regulator board. IF run long enough, the PCB can 
actually de-laminate or crumble when removed. Run very hot and little 
circulation in the honey-comb structure.

Dave

- Original Message - 
From: "Tim Schulz" <[EMAIL PROTECTED]>
To: 
Sent: Tuesday, August 19, 2008 11:09 AM
Subject: [time-nuts] HP 5062C service manual, schematics, or power supply 
troubleshooting tips


Greetings, I am new to the list - I have an HP5062C Cesium Beam standard
whose 18v power supply has died.  I pulled the 18v regulator board out
and it's pretty discolored from running hot.  I don't know if there is a
short on the 18v bus that caused the failure, or if its the regulator
board itself.  I have done lots of internet searches but have not found
a service manual for sale yet, only the HP Journal issue on the
standard.  I do have the operations manual in PDF form.

Many thanks, Tim Schulz...

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