Hey Jon,
I don't suppose the scope had any options installed that have been removed?
After I repaired my 2467 I had a persistent TEST 05 failure. In my case
this was because the options board was out and disconnected. Some of the
trigger signals run through there, so if an option is removed, you may need
to jumper the mainboard to route the signals right...
Siggi
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On Tue, Jan 26, 2021 at 3:22 PM Jean-Paul <jonpaul@...> wrote:
Hello Chuck: I traced line trigger signal, fine on the main board power
connector, and it DOES line trigger! As the same fault Test 05 fail 42
appears on all the A5 control boards I have checked, and all were reworked
for the SMD caps, PC trace damage and NVRAM, and work fine in other units,
the FAIL 42 remains a puzzle.
To Craig, I have no idea the past history of the unit but it is very clean
and SN B062, rather late. The flaky CH 3 VERET POS pot and odd trigger
fault leads me to suspect either bad treatment physically, or just oxidized
contaces due to long dormancy. I will tackle the hybrid cleaning another
day, but Chuck doubts that U500 is at fault.
The mystery deepens.....
Good day and So long!
Jon
