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Re: Dell Inspiron 5758 - Nie uruchamia się
by Google Adsense [BOT] • 1 February 2025, 14:20
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- Measure the voltages to ground on pin 17, 73, 75, 99, 112, 114, 120 of KBC chip.
- Measure the voltages to ground on pins 93, 117 of KBC chip in cases "a", "b":
a) Power button released.
b) Power button pressed.
Now disconnect the power supply, wait about two minutes, reconnect the power supply and perform the following measurements.
Measure the following voltages to ground in cases "c", "d":
- On pins 2, 3 of transistor Q1701.
- On pins 14, 15, 21, 64, 77, 81, 85, 100, 108 of KBC chip.
c) Before pressing to the power button.
d) After pressing to the power button.
- Measure the voltages to ground on pins 93, 117 of KBC chip in cases "a", "b":
a) Power button released.
b) Power button pressed.
Now disconnect the power supply, wait about two minutes, reconnect the power supply and perform the following measurements.
Measure the following voltages to ground in cases "c", "d":
- On pins 2, 3 of transistor Q1701.
- On pins 14, 15, 21, 64, 77, 81, 85, 100, 108 of KBC chip.
c) Before pressing to the power button.
d) After pressing to the power button.
KBC
17,75,112,114 - 3.3V
73, 120 - 0V
99- 2.8V
KBC released
93,117 - 3.3V
KBC pressed
93 - 0V
117 - 3.2V
Q1701 Before
2- 3.3V
3- 3V
Q1701 After
2- 3.3V
3 - 0V, a po kilku naciśnięciach jest 2.9-3V, nie zawsze jest 0V
KBC Before
14,15,85,108 - 3.3V
21,64,81,100 - 0V
77 - 1.6V
KBC After
14,15,81,85,100,108 - 3.3V
21,64 - chwilowy wzrost do 1.5V tyle zdążył mi multimetr złapać.
77 - 0V
17,75,112,114 - 3.3V
73, 120 - 0V
99- 2.8V
KBC released
93,117 - 3.3V
KBC pressed
93 - 0V
117 - 3.2V
Q1701 Before
2- 3.3V
3- 3V
Q1701 After
2- 3.3V
3 - 0V, a po kilku naciśnięciach jest 2.9-3V, nie zawsze jest 0V
KBC Before
14,15,85,108 - 3.3V
21,64,81,100 - 0V
77 - 1.6V
KBC After
14,15,81,85,100,108 - 3.3V
21,64 - chwilowy wzrost do 1.5V tyle zdążył mi multimetr złapać.
77 - 0V
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Na tym pinie nie następuje pełny spadek do 0V bo wciśnięciu guzika. Bezpośrednio na guziku taki spadek występuje.
Laptop ogólnie reaguje na guzik, gdyż na chwilę kręci się wiatrak i zapala dioda.
Na zasilaczu laboratoryjnym widać wzrost do 300 mA i odcina go od razu.
Próbowałem zewrzeć pin 117 do masy i działa tak samo jak przycisk.
Laptop ogólnie reaguje na guzik, gdyż na chwilę kręci się wiatrak i zapala dioda.
Na zasilaczu laboratoryjnym widać wzrost do 300 mA i odcina go od razu.
Próbowałem zewrzeć pin 117 do masy i działa tak samo jak przycisk.
Re: Dell Inspiron 5758 - Nie uruchamia się
by Google Adsense [BOT] • 25 February 2025, 07:41
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