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Old 13th February 2006, 06:26 PM   #1
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Default Aleph-x problems

Ok here are a few pictures for you geniuses. I have a big problem with firing up my Aleph-X.
I have more than 10V on T8,T9 and T12,T13. And thatís before turning up to 220V.So far I have checked for AC from the power supply. The most obvious mistake is that I have mounted something backwards or made a wiring mistake. Thatís why Iím posting pictures.
Any comments?
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Old 13th February 2006, 06:27 PM   #2
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Old 13th February 2006, 06:29 PM   #3
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power supply
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Old 13th February 2006, 09:15 PM   #4
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Since I don't have a clue about the transistor numbers, perhaps
someone can point a link to the schematic in question.
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Old 13th February 2006, 09:23 PM   #5
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Sorry

http://www.kk-pcb.com/alephx.html
http://www.kk-pcb.com/power-x.html
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Old 13th February 2006, 10:57 PM   #6
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Not enough drive for T8 etc, or too much current through the
CCS transistors. If there's a lot of current (voltage across
Source resistors) then it's the latter. If not, then perhaps
there is not enough current going through the input diff pairs
to bias up T8 etc.
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