> Take CN03, take green as Ground. Output Voltages are on the middle brown
> Connector=-4.9 Volts, on the Right brown one 4.9 Volts.
>
> Next: Take CN2A. Yellow is ground. I´ll start from the left brwon
> connector. 4.9 Volts, 4.9 Volts, -6.8 volts, 4.9 Volts, 11.8 Volts
hey remember me?
well, i've finally gotten around to doing some work on the dw8000. i've
replaced the caps on the voltage converter board except for the large
ones, which i will replace as soon as i get them. the local electronic
supply didn't have them in stock.
i measured the voltages across cn2a and cn3a and this is what i found:
cn3a
-4.9v
965mv
cn2a
-4.9v
4.99v
-6.9v
560mv
12.9v
so the big differences are obviously the mv values and the first -4.9v
value for cn2a(unless that was a typo on your end). i triple checked all
the measurements, so i know they're right.
what does this mean? is the power supply hooped? if so, what is a
suitable replacement?
when i first fired up the keyboard after replacing the caps, there was
the distortion, like before, only it seemed to sound muddier than
before. i can't be sure on that because it's been a few months since i
last messed with it. the distortion was present without touching any
keys and upon pressing the keys it increased in volume and muddiness. it
didn't matter which key was pressed, it was the same note of mud. after
less than a minute, the distortion then faded to nothing. now there is
no sound whatsoever, not even hiss with the volume right up. there is
only a fairly loud and short pop/buzz when powering up. if i turn it off
for a few seconds then back on, there is a quieter and more normal
sounding pop. i have to leave it off for several minutes and then turn
it on to hear the loud pop/buzz.
the battery tests fine and patch changes can be retained in memory.
when replacing large caps how do you deal with the adhesive that is used
to keep them in place? cut around them with an exacto? what is the
adhesive? i'll need to get some.
asking for guidance, once again,
merci,
shayne
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