• Fujitsu E746 - Brak schemat, gniazdo zasilania

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#21 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by matic 14 December 2023, 23:19
Measure the power consumption (in mA) of the board in the following cases without battery connected:
a) Board turned off (before pressing to the power button).
b) Board turned on with RAM memory connected.
c) Board turned on without RAM memory connected.

Since the board doesn't work with your service power supply, you need to cut the Red or Black wire (one of them) between the DC socket and the motherboard and connect an ammeter between both ends of cut wire to measure the power consumption.

An alternative option is to use a "clamp" meter. This way you can measure the current without cutting the wire.
In this case you can measure the current at points "b" and "c" only, since such a meters usually can not measure low electrical currents.
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Re: Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


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#22 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 15 December 2023, 14:08
Hello!

a) Po podłączeniu następuje autostart. Po starcie 320mA. Po wyłączeniu z przycisku. 20mA, spada do 19-15mA i po chwili spada do 0.
b) 320mA
c) 320mA

Już wiem czemu mój zasilacz nie działał odpowiednio. Miałem jak przedłużenie kabli, cienkie krokodylki. Widać były za słabe, by przepuścić odpowiedni prąd.
Zlikwidowałem je i zastosowałem porządniejsze i działa bez problemu.

#23 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by matic 15 December 2023, 15:03
Measure the voltages to ground on both pins of diode "A" and on pins 1, 3 of diode "B" with the RTC battery connected only (without power supply and main battery).
Image
Diode "B" pinout:
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#24 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 16 December 2023, 18:04
A - 2,9V and 3V
B - 1 pin 3V, 3 pin 2,9V

#25 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 18 December 2023, 00:37
Up

#26 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by matic 18 December 2023, 08:47
Use a DDR4 RAM slot LED tester and test both RAM slots.
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Measure the voltages to ground on both pins of marked quartz with the RTC battery connected only (without power supply and main battery). It's best to measure these voltages with an oscilloscope, if you don't have it, measure with a multimeter.
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#27 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 18 December 2023, 17:31
Cześć

Musiałem zamówić tester do DDR4, bo nie mam, mam do DDR3.
Mam pytanie, czy te pomiary dokonywać na włączonej płycie, czy wyłączonej?

#28 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by matic 18 December 2023, 22:21
Golima wrote:Mam pytanie, czy te pomiary dokonywać na włączonej płycie, czy wyłączonej?
matic wrote:with the RTC battery connected only (without power supply and main battery).
Isn't it obvious? How can you turn on a laptop without the main battery and power supply connected?

#29 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 19 December 2023, 10:33
Chodziło mi bardziej o tryb S0 lub S5 :)
Ale ok rozumiem.

Image
Image

quartz 0.350V and 0.460V

#30 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 20 December 2023, 11:34
UP

#31 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Vogelek23 20 December 2023, 11:56
Golima wrote:Nie mam jakiegoś super zasilacza serwisowego
A dokładnie to jaki masz (model, może jakieś zdjęcie)? Może po prostu jest za słaby do zasilenia tego komputera.

#32 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 20 December 2023, 12:37
Hej

Xtreme X3010 300 W 0-10 A 0-30 V

To nie za słaby zasilacz, tylko odkryłem, że chcąc przedłużyc krokodylki użyłem 2 zestawu cieńszych krokodylków, nież te oryginalne i one dosyć się grzały.
Zmieniłem je na grubsze i jest już wszystko OK :)

#33 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by matic 20 December 2023, 14:13
Golima wrote:[ Obrazek ]
[ Obrazek ]
Am I right that only a few LEDs light up on the RAM tester? All other ones don't glow any a little, even in the dark?

#34 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 20 December 2023, 18:41
Jak jest włączony, czyli w S5 to świeci tak:

Image

Jak jest w trybie S0, czyli wyłączyłem go z przycisku to świeci tak i widać, że 3 diody nie palą się.

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#35 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 21 December 2023, 19:41
UP

#36 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by matic 22 December 2023, 08:51
Test the RAM slots with the power supply and main battery disconnected from the motherboard. What LED pattern do you get on the RAM tester in this case?

#37 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 22 December 2023, 19:01
Hello

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#38 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 23 December 2023, 20:26
Found 1 more.

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#39 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 25 December 2023, 16:04
UP

#40 Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


by Golima 27 December 2023, 23:10
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Re: Fujitsu E746 - Brak schemat, gniazdo zasilania


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