Re: [softrock40] Ensemble RXTX Problem 3.3 volt supply
- I would recommend Chip Quik.
The first time I ordered some with other stuff I didn't recognise it as I expected something larger for the price, not a thin non-descript bit of wire in what looks like a drinking straw..
It's a brittle length of low melting point solder, when applied it makes it easy to lift SMT components off the PCB.
73 ... Sid.
On 30/11/11 20:38, Albert Gerheim wrote:
"renew"? Is this the same as replace? My experience soldering stuff this small is minimal, so de-soldering it would be "very hard". I think I got "OL" (overload) with the ohmmeter on pin 4. Lemme look again, though.
On Wed, Nov 30, 2011 at 2:13 PM, Alan <alan4alan@...> wrote:
----- Original Message -----
Subject: [softrock40] Ensemble RXTX Problem 3.3 volt supply
> Is there any chance I could have a defective regulator? (LP2992AIM5-3.3V)There have been a few unexplained instances of trouble with this regulator.
> When I completed the second part, the test voltage measured about 4 volts
> versus 3.3. I figured it might drop under load. After I completed the
> next stage, here are the voltages I'm getting:
> Pin 1: 5V
> Pin 2: 0V
> Pin 3: 5V
> Pin 4: 2.89V
> Pin 5: 0.986V (this should be 3.3 volt out).
It's output should be 3V3, this normally is seen at all times, loaded or
Pin 4 is higher than normal, all I can suggest is to renew the regulator.
Make sure there is no flux residue, especially around pin 4 which is a high
73 Alan G4ZFQ
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-- Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot, Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support Senior Staff Specialist, Cricket Coach Microsoft Windows Free Zone - Linux used for all Computing Tasks