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8116A Code 42

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Mick B:
Hello, Yes I used socket's here are the U32 readings no other chips in, old chip and new chip
U32 OLD
  PINS........Note: not very warmed up
  2.  -0.817 V
  5.  -1.77 V
  3.  -1.78 V
  6.  -0.817 V
14.  -1.77 V
11.  -0.817 V
15.  -0 V
  9.  -0.834 V

U32 NEW.....Very warmed up
  PINS
  2.  -0.766 V
  5.  -1.72 V
  3.  -1.86 V
  6.  -0.778 V
14.  -1.86 V
11.  -0.775 V
15.  -0 V
  9.  -0.832 V

It looks like U32 was OK.  :-+

Going to start adding chips starting with U37.....U33.....and lastly U34

Mick B:
OK, starting with U37 the temp is 68.4C still very hot ay?
  U37
  4. (I)  -2.23 V
  5. (I)  -2.22 V
  2. (O) -1.67 V

  6. (I)  -1.84 V
  7. (I)  -1.82 V
  3. (O) -1.79 V

10. (I)  -5.29 V
11. (I)  -1.89 V
14. (O) -0.765 V

12. (I)  -1.83 V
13. (I)  -1.78 V
15. (O)  -2.60 V
  9. (O)  -0 V

   U33
  4. (I)  -1.66 V
  5. (I)  -0.767 V
  2. (O) -1.82 V

  6. (I)  -1.71 V
  7. (I)  -1.66 V
  3. (O) -1.84 V

10. (I)  -1.66 V
11. (I)  -1.85 V
14. (O) -1.85 V

12. (I)  -0.967 V
13. (I)  -1.75 V
15. (O) -0 V
  9. (O) -1.66 V

    U34
  4. (I)  -1.66 V
  5. (I)  -1.85 V
  2. (O) -1.83 V

  6. (I)  -0.779 V
  7. (I)  -1.66 V
  3. (O) -1.85 V

19. (I)  -1.66 V
11. (I)  -0.775 V
14. (O) -1.84 V

12. (I)  -0.967 V
13. (I)  -0.825 V
15. (O) -0 V
  9. (O) -1.83 V

Now, I had the settings at MODE= EBUR @14, AMP =1V, offset = 0V, FRQ = 1KHz, WAVE =OFF, Output = ON.
Some of the voltages are different than you known good ones but still in range, I wonder about settings?
Also I don't have anything to compare U34 with.
It's getting late, I'm going to bed. Thank you.
 

MarkL:

--- Quote from: Mick B on June 26, 2024, 12:50:50 am ---Hello, Yes I used socket's here are the U32 readings no other chips in, old chip and new chip
U32 OLD
  PINS........Note: not very warmed up
  2.  -0.817mv
  5.  -1.77
  3.  -1.78
  6.  -0.817mv
14.  -1.77
11.  -0.817mv
15.  -0
  9.  -0834mv

U32 NEW.....Very warmed up
  PINS
  2.  -0.766mv
  5.  -1.72
  3.  -1.86
  6.  -0.778mv
14.  -1.86
11.  -0.775mv
15.  -0
  9.  -0.832mv

It looks like U32 was OK.  :-+

Going to start adding chips starting with U37.....U33.....and lastly U34

--- End quote ---
Did you really mean mV on the above readings, or V?  If mV, there are some major issues.

And the next set as well.  Please clarify before I start analyzing anything.

Mick B:
Did you really mean mV on the above readings, or V?  If mV, there are some major issues.
[/quote]

1.The readings are Volts example -1.77......is this not - 1,volt and  770 millivolts?
2.The readings are in Millivolts example 0.817mv........ is this not -800 and 17 millivolts?   
I wrote these I thought as to avoid confusion I guess this is wrong
Please tell me the correct way, and I will do that way every time.
Is there a problem with U32?  I thought the readings were because of the settings in EBUR controlling the output?
Time to regroup.  Please remember, I'm a beginner with some cool diagnostic equipment and the GREATEST desire to learn while I still can, @ 71
I really appreciate your time and patience with me Mark. 

PS just noticed the decimal point missing in  U32 OLD pin 9. I fixed this

MarkL:

--- Quote from: Mick B on June 26, 2024, 04:33:55 pm ---1.The readings are Volts example -1.77......is this not - 1,volt and  770 millivolts?

--- End quote ---
Yes.


--- Quote ---2.The readings are in Millivolts example 0.817mv........ is this not -800 and 17 millivolts?   

--- End quote ---
No.  -0.817mV (and it's a capital V), is -0.000817V.  Which is why I was analyzing many of these issues as a shorted node close to 0V.  I don't how many wrong assumptions and conclusions were made now, and time wasted.

I cannot help you if you don't provide accurate information represented in a standard format.  Please correct your readings starting with U32 and I will look at them again when I get  a chance, and we'll start again from there.  Put everything in Volts for the purposes of measuring these nodes.  The above example should be "-0.817V" (or "-0.817 V" if you prefer a space for readability), if that's the value you meant.

  https://www.electronicsteaching.com/Electronics/units.html

  https://en.wikipedia.org/wiki/International_System_of_Units

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