I have a problem in the la-e801p motherboard DC1 +RTCVCC short circuit with earth, I feel the cc7 capacitor short it located close to uc1.ak19 Please anybody knows the location of cc7
LA_E801P Problem +RTCVCC Short Circuit
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Re: LA_E801P Problem +RTCVCC Short Circuit
Keeping the board on the DC1 location side, near bottom right side of cpu is CC7. You can easily trace that capacitor as it will be near 2 resistors(20K) for RTCRST# and SRTCRST#. -
Re: LA_E801P Problem +RTCVCC Short Circuit
The RTC section is in the PCH chipset. If it's got a separate PCH then it's a basic BGA rework job. If it's integrated in the CPU then you need to replace the whole board.Originally posted by PeteS in CARemember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.Comment
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Re: LA_E801P Problem +RTCVCC Short Circuit
CC7 is on the back of PCH but its very difficult to trace it without boardview.You can try injecting 1V,5A to +RTCVCC and see if any cap is getting mildly hot on back side of PCH .
Chances are probably more of a shorted PCH which will require replacement. PCH & cpu is combined on this platform-so perhaps SOC replacement will be needed.Comment
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Re: LA_E801P Problem +RTCVCC Short Circuit
I kept little drop soldering paste tope of the capacitor (which I feel shorted cap) and inject 1V, 1A to +RTCVCC (current taken 750ma) tope of the CC7 cap soldering paste melted. Disconnect the inject supply. Removed capacitor and tested it’s short (meter reading 4 oms ) replaced cap it's ok.
Now AC LED ok, VREG3(P3) - 3.5V, VREG5(P13) - 4.95V, VIN(P12) - 19V, CS1(P1) - 0.900V , CS2(P5) - 0.700V, SW1(P18) - 4.9V, SW2(P8) -4.9V, when switch on the system not on but END1(P20) -3.25V, END2(P6) - 0V reading 4 or 5 second. Please advice me to find the fault.Comment
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Hello.
I have seen a short circuit tester made with 3 * 9V batteries, a voltage limiter component and a resistor connected to the probes of a multimeter.
The theory is that the meter becomes sensitive enough to read very low resistances and the lowest resistance to ground on a circuit is likely to be a short circuit in that area.
Link
The Amazing $1 Short Finder Upgraded! Convert ... - YouTube
https://www.youtube.com/watch?v=0eixDdCpiO4
My multimeter isn't normally sensitive to very small resistance, but when I put a 1 mega ohm resistor... -
by seifaldennLCR T7 tester problem short( dz2---v05 )
you changed v05 working now Not a fixed measurement
Any measurement out 2.95v
Kim can solve the problem out 2.95v...
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by gagak_84
i have short circuit at +VCCSAP
i had removed
PC801, PC802,PC803 and PC 804 and PU801..
but still short circuit in this line... it happened only when processor present on the board.. but when i remove the processor there is no short circuit in this line.. is it normal?... -
by 2Stupid4ULaptop data:
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Bon soir dear online techies, enthusiasts, modest helpers and whomever I might have forgotten!
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Small technical problem on a Nintendo Switch lite
Here's what I noticed: the USB port has been damaged internally, with a short circuit on the power supply line to the small fuse.
After replacing the USB connector, the short circuit went away and I can't see any other short circuit in the whole motherboard.
When I charge the console, it seems to be charging: I get 15 volts and an amperage of 0.450 A.
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