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8116A Code 42
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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