[time-nuts] HP 3458A ISOLATOR DTACK err @ pwr up

Brooke Clarke brooke at pacific.net
Mon Jul 27 23:55:22 UTC 2009


Hi:

At power up the HP 3458A briefly says TESTING RAM and all the panel pixels are 
on then displays ISOLAOR DTACK.  The repair manual says:
201 Outguard Controller A5.

The A6 Outguard pwr supply shows 5.13 for both of the 5 volt supplies, right in 
the middle of the acceptable range.  The +15 red wire at P3 reads 14.0, but I 
don't see a spec for it.

Is there any component level information on these DVMs?

-- 
Have Fun,

Brooke Clarke
http://www.prc68.com



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