[volt-nuts] The HP 8903A Audio Analyzer

Will willvolts at gmail.com
Wed Sep 19 08:14:22 UTC 2012


2012/9/18, Roy Phillips <phill.r1 at btinternet.com>:
> I have a faulty HP8903A. Despite the excellent Agilent manual archive, and
> other sources that I am aware of – I cannot find any source for the Service
> Manual – can anybody help ?  The unit starts up and displays all digits as
> with the normal “self check”, but stops dead at this stage. All voltages
> would appear to be normal. It has a sequence of four yellow LED’s on the
> Processor PCB, which are active – but what is the ‘normal’ state for these.
> This is not an easy unit to access without the vertical series of PCB’s
> without extenders – any help would be much appreciated.
> Thanks
> Roy
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