• Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

It is currently 14 October 2025, 23:21

Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
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#1 Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by HotIce • 30 September 2025, 19:01
Cześć,
Przy podłączonej baterii oraz zasilaniu pobór prądu 47mA oraz świeci na niebiesko dioda przy gniazdku zasilania.
Napięcia na cewkach:
PL1 - 8v
L8 - 3.3v
L9 - 5v
L1 - 0v
L10 - 1.8v
L11 - 1.8v
L12 - 0 v
L13 - 0v

Nie mam schematu i nie wiem który pin idzie z włącznika w klawiaturze, ale jest na kilku pinach napięcie 3.3v i żadne nie zmienia się na 0v przy wciśkaniu klawisza power. Próbowałem przez rezystor zwierać te piny co mają 3.3v do masy ale brak reakcji. Wgrałem inny bios, nic to nie dało. Napięcie zasilania na kości bios jest obecne, obserwując oscyloskopem nóżki kości bios, na początku jest przez ułamek sekundy jakaś wymiana danych a potem już nic - stan wysoki. Rezystancja na cewkach bez napięcia L12,L13 dość wysoka - 47 oHm, co tutaj dalej począć?

Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by Google Adsense [BOT] • 30 September 2025, 19:01

#2 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by Vogelek23 • 1 October 2025, 01:13
Zamieść wyraźne zdjęcia obu stron płyty (usuń przedtem wszelkie naklejki i folie, mogące zakrywać elementy).

#3 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by HotIce • 1 October 2025, 18:07
proszę bardzo, jak za słaba jakość to mogę próbować jeszcze po kawałku coś wydusić z tego mojego "szałomi"

Image

Image

Image

#4 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by matic • 1 October 2025, 21:27
HotIce wrote:L10 - 1.8v
L11 - 1.8v
Are these two measurements correct?

Post a clear picture with visible markings on the chip U7 (it's located near the coil L1).

#5 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by HotIce • 4 October 2025, 16:32
matic wrote:Are these two measurements correct?


tak, to jest poprawny pomiar, L10 i L11 mają 1.8v.
Poniżej chip U7 w przybliżeniu:

Image

#6 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by matic • 5 October 2025, 12:01
Measure the voltages to ground on pins 1, 3, 8, 10, 11, 12, 15, 16 of the chip U7.
Chip U7 pinout:
Image

#7 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by HotIce • 5 October 2025, 12:51
U7:
1 - 19v
3 - 3.3v
8 - 3.3v
10 - 2.9v
11 - 0v
12 - 0v
15 - 0v
16 - 0.03v

#8 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by matic • 5 October 2025, 18:04
Set your multimeter to the diode test mode and measure the voltage drops to ground on pins 15, 16 of the chip U7 with the positive (red) probe connected to ground.

#9 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by HotIce • 5 October 2025, 21:10
matic wrote:Set your multimeter to the diode test mode and measure the voltage drops to ground on pins 15, 16 of the chip U7 with the positive (red) probe connected to ground.

spadek napięcia na pinach 15 oraz 16 to 0.58v

#10 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by matic • 9 October 2025, 15:47
Use a continuity tester to check if pin 110 of the KBC chip is connected to any pin of the keyboard connector.

#11 Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by HotIce • 9 October 2025, 16:36
matic wrote:Use a continuity tester to check if pin 110 of the KBC chip is connected to any pin of the keyboard connector.


Pomiędzy pinem 110 KBC nie ma przejścia na żaden pin złącza klawiatury.

Re: Toshiba C50-H-104 ,MB : IP3_IN16_MB_V21_20200831A - nie startuje

by Google Adsense [BOT] • 9 October 2025, 16:36
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