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69923Re: Ensemble Stage Three Problems

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  • timinuganda
    Nov 11, 2012
    • 0 Attachment
      Russ,

      thank you for helping me work through my troubles with Stage 3. Thank you for your time and your patience with a new student.

      tim
      5R8Z

      --- In softrock40@yahoogroups.com, "rlramirez77" <russ.ramirez@...> wrote:
      >
      > Not sure my last reply made it back to you.
      >
      > Your notes are correct regarding the resistor values. Alan can guide you through the rest of the problem determination better than I.
      >
      > Russ
      > K0WFS
      >
      > --- In softrock40@yahoogroups.com, "timinuganda" <timinuganda@> wrote:
      > >
      > > Russ, the Ensemble was purchased December 2010 for $77 so I'm guessing it is not an Ensemble II, but that's a guess. The board says, "RXTX Ensemble - KB9YIG.com 5/24/10." Does this mean mine is not an Ensemble II?
      > >
      > > My "Builder's Notes" are dated 3/22/2011, only three months after it was purchased. The schematic on page 1 of 17 in this version says R4 is 4.7K and R6 is 1M. Am I referencing something wrong?
      > >
      > > Here are my Stage 2 notes:
      > >
      > > 5.02 V
      > >
      > > 3.7v then falls to 0v
      > >
      > > After Google helped me learn to test a Diode (and is why I'm delayed in my response) I can report:
      > >
      > > D1 - 703
      > > D2 - 699
      > >
      > > They are installed correctly.
      > >
      > > Thanks Russ, look forward to your response.
      > >
      > > tim
      > >
      > >
      > >
      > > --- In softrock40@yahoogroups.com, Russ Ramirez <russ.ramirez@> wrote:
      > > >
      > > > You're welcome. I assumed this was an RX Ensemble II, is that correct, or
      > > > no?
      > > >
      > > > For the aforementioned, or the Rx Ensemble, use the schematic value of
      > > > 1Meg. Regardless, ensure that you didn't accidentally insert one of the two
      > > > zener diodes in upside down. If you did not, then measure the resistance
      > > > across each and ensure it is roughly the same reading. Did you perform the
      > > > USB Power Supply testing steps?
      > > >
      > > > Russ
      > > >
      > > > On Sat, Nov 10, 2012 at 9:38 AM, timinuganda <timinuganda@> wrote:
      > > >
      > > > > **
      > > > >
      > > > >
      > > > > Russ, thank you for responding.
      > > > >
      > > > > No, the ATTiny85 was in the socket when I took measurements. R4 in my
      > > > > "Builder's Notes" Stage 03 Local Oscillator says "R04 4.7K 1/6W 5%
      > > > > yel-vio-red-gld" and that is the resistor I have installed. Is this wrong?
      > > > >
      > > > > With the microcontroller removed and the USB plugged in I read the
      > > > > following:
      > > > >
      > > > > R1 - 0.1V
      > > > > R2 - 2.64V
      > > > >
      > > > > thanks for working through this with me,
      > > > >
      > > > > tim
      > > > >
      > > > >
      > > > > --- In softrock40@yahoogroups.com, Russ Ramirez <russ.ramirez@> wrote:
      > > > > >
      > > > > > Did you have the ATTiny85 out of its socket when you made the resistance
      > > > > > measurements? R4 is 1M Ohm. With the microcontroller removed and just the
      > > > > > USB plugged in, you should see close to 3.3v at R1 and R2.
      > > > > >
      > > > > > Russ
      > > > > > K0WFS
      > > > > >
      > > > > > On Sat, Nov 10, 2012 at 7:11 AM, timinuganda <timinuganda@> wrote:
      > > > > >
      > > > > > > **
      > > > >
      > > > > > >
      > > > > > >
      > > > > > > This is my first attempt to build/solder smt, resistors, etc. I am a
      > > > > > > novice builder. Here are the readings for Stage 3 components on board
      > > > > dated
      > > > > > > 5/24/10.
      > > > > > >
      > > > > > > 5v rail = 4.98
      > > > > > >
      > > > > > > 3v rail = 1.01
      > > > > > >
      > > > > > > R
      > > > > > > 1 – 67
      > > > > > > 2 – 67
      > > > > > > 3 – 4.61K
      > > > > > > 4 – 4.58K
      > > > > > > 5 – 2.19K
      > > > > > > 6 – 984K
      > > > > > > 7 – 68
      > > > > > > 8 – 9.25K ohm
      > > > > > > 9 - 2.18K
      > > > > > > 10 – 2.18K 1.06V (not 3V)
      > > > > > > 11 – 471
      > > > > > > 12 – only 1 ohm
      > > > > > >
      > > > > > > Two obvious problems I see are:
      > > > > > >
      > > > > > > 1. Only 1V on Resistor 10.
      > > > > > > 2. Resistor 12 is dead.
      > > > > > >
      > > > > > > There are no solder bridges on the Si570 per the builder's notes.
      > > > > > > All Resistors were checked visual for proper color code, particularly
      > > > > > > number 12 which appears dead.
      > > > > > >
      > > > > > > Windows 7 says USB device not recognized.
      > > > > > >
      > > > > > > Does anyone have any suggestions?
      > > > > > >
      > > > > > > tim
      > > > > > > 5R8Z
      > > > > > >
      > > > > > >
      > > > > > >
      > > > > >
      > > > >
      > > > >
      > > > >
      > > >
      > >
      >
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