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69907Re: Ensemble Stage Three Problems

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  • rlramirez77
    Nov 10, 2012
    • 0 Attachment
      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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