On 23 Sep 2005 09:01:06 -0700 "RJ" wrote:

I picked one these and it has LED's 13 threw 16 lit in the test mode
all the time. Problem points to U6. Quad 2 Input NOR Gate. TI SN4467,
HP 1820-0328.


When the output is low the Led lights up.


It looks like the replacement would be a SN7433, Quade 2 input NOR with

open collector.

I show the 1820-0328 (SN4467) crossing to a SN7402.

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Jim Adney
Madison, WI 53711 USA
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