Re: TECH: GTB Sys 3 booting troubles

On Nov 5, 9:42 am, 1st <robert_fue...@xxxxxxxx> wrote:
On Nov 4, 2:10 pm, Pinthe...@xxxxxxxxx wrote:

A good place to measure the +5 is across C19 at the top of the CPU.

-- Good 5V there and good 3.27 volts at the points mentioned earlier.

C1 is at the transformer in the bottom. If it is leaky the input to
the regulator will be lower than it should be and choppy on the back
end of the positive sine curve, which will make the regulator work
harder.

-- I have .233 volts A/C across the cap and also at the 12v feed to
the regulator board.
-- Too much? Change the cap and the bridge or just the cap and check
again?

Thanks,
Chris

I would say that ripple is a touch on the high side, but you may want
to wait for others to chime in. (I think the rule of thumb is less
than 0.2VAC is the cut-off?)

I would think the bridge is fine, but might be worth changing while
you're in there as they are cheap.

Doug
.

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