Re: Toshiba a300-20w strange voltage
with chip on?
with chip on?
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Hi Folks
I'm looking for a extreme high current short killer solution for a reasonable cost.
I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
After taking off the socket, the shorts dissappear again.
The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...10-15-2024, 10:13 AM -
I check PPBUS_AON and there is a short present on the line, the computer shows a short when testing for short to ground, so when I inject voltage into the line, I get 0AMPS so no short is showing up. I have replaced a blown cap on this board that exploded and tested for the short and it is now removed. Any suggestions? I tested voltage at the line when the fuses are connected and I am getting 1.2 Volts at the line.
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Hello!
Recently I have a problem finding a dead short (as far as my cheap multimeter is concerned) on a multilayered (12 layer) PCB. It is caused due to mechanical stress (warping the board and, I assume, cracking inner layers). Injecting voltage of 0.9 V (operational voltage of that part of the circuit) and drawing 0.5 W doesn't cause any visible hotspot on a thermal camera.
Does anybody have any tips & tricks in order to locate the short more or less precisely? The area has a lot of powerplanes, so it's both blessing and a curse.
Silly idea no. 1: Can I... -
Have an A2141 which is reading about 5.2V 0.07A on all USB jacks, started doing the measurements.
PPBUS_3GH diode: measures good .45V
PPBUS_3GH Voltage: maybe not so good 12.25V maybe bad T2? Unit did not come up in DFU on configurator.
The weird so far is
PP3v3_G3H_RTC_X diode: .104V (WTF?)
PP3v3_G3H_RTC_X voltage: 3.39V (Normal)
Stopped there attempted reverse voltage injection at PP3v3_G3H_RTC_X with 1V. Instead of the circuit sinking any current, My PSU suddenly reads 3.4V with no current draw.
Not sure what any of this means... -
This specification for the Toshiba Portege R30-C Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the R30-C boardview and R30-C schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Toshiba Portege...09-06-2024, 05:30 AM
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