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Technical To Do: Difference between revisions
m
crossed off 0v -> +6V short
m (Mentioned comms problems) |
m (crossed off 0v -> +6V short) |
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* FIX THESE PROBLEMS WITH COMMS: | * FIX THESE PROBLEMS WITH COMMS: | ||
** +6V rail is shorted somewhere to the 0V rail. Even with all chips and switches removed. Not really surprising since both are used a lot. Also it's possible that irreversible damage may have been caused to chips due to this. | ** <del>+6V rail is shorted somewhere to the 0V rail. Even with all chips and switches removed. Not really surprising since both are used a lot.</del> SHORT REMOVED! Also it's possible that irreversible damage may have been caused to chips due to this. | ||
** 68k feedback resistor is shorted with the output of the A/B variable amp. This hasn't given a problem yet but will mean that to presenters on A and B channel they will hear a very quiet signal, maybe not even one perceivable over electircal noise. | ** 68k feedback resistor is shorted with the output of the A/B variable amp. This hasn't given a problem yet but will mean that to presenters on A and B channel they will hear a very quiet signal, maybe not even one perceivable over electircal noise. | ||
** Due to confusion between the WIRE numbers and serial PIN numbers the switches are arranged wrongly (I think) and this should mean nothing except that the switches perform the function they should, but in a VERY counter-intuitive way.[[User:Malcolm.chambers|Malcolm.chambers]] 20:33, 9 January 2010 (UTC) | ** Due to confusion between the WIRE numbers and serial PIN numbers the switches are arranged wrongly (I think) and this should mean nothing except that the switches perform the function they should, but in a VERY counter-intuitive way.[[User:Malcolm.chambers|Malcolm.chambers]] 20:33, 9 January 2010 (UTC) | ||