Am Montag, den 22.02.2010, 17:25 +0000 schrieb Al Johnson: > It can be hard to tell whether the joint is electrically good just by looking > at it, and solder connections on those components are tiny. You really need > to > use a meter to test it, and I expect this was done by whoever did the fix for > you, so it probably isn't the problem. If you are competent to test this, or > know someone who is, the schematics and fix SOP are both available: > > http://people.openmoko.org/joerg/GSM_EMI_noise/big-C_rework_SOP_rc2.pdf
Okay, the joint I suspected to be broken seems fine. It's the one on the left of the two red arrows in the above description. That's where my capacitor is connected to and I just checked the the resistance from the capacitor to the pad where the right red arrow points at. No measurable resistance, so the joint should be electrically good. > > > Controls 48 and 12 are on maximum, while control 5 has 12 steps > > > remaining. You still have scope to make the mic a fair bit louder if you > > > need to. 3, 5 and 121 would give the same volume level with less chance > > > of distortion. > > > > Tried it. Still so soft that you have to yell really loud at the phone > > and only hardly can hear anything on the other end. I'm usually testing > > with my stereo, turning it on and putting the phone on the speaker. But > > I have to turn my stereo to levels it's getting uncomfortably loud just > > to hear a faint noise over the phone. > > So 3, 7, 127 is still too quiet? In that case something may be wrong. Check > the buzz fix, and also that the hole in the case isn't blocked. Checked it, the hole is free. Jan
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