Re: Faulty Philips PSU (715g5246-p01-000-002s )
check R9332
check R9332
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
ic9101 for 12/24v power supply and ic9801 for power factor corrections(PFC)Comment
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
Thank you mr20123e!
R9332 is fine. It´s 2.4Ohms
My intention with adding external 5.2V: To test the rest of the PSU....Comment
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
then swap psu.Comment
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
12v & 24v is not workingComment
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
have a problem with this board,
- i dont have light on display
- i have 24v.
- dim - 3.3v
- on/off - 3.3v
i see that conector goes in displayComment
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
fix, change one led and now it`s workingComment
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
Hi, have you succeeded in repairing of the board? I have the same issue, spent lot of time trying to diagnose the fault, but with no success.Comment
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Re: Faulty Philips PSU (715g5246-p01-000-002s )
I know this is an old thread, but I just want to comment that I'm pretty sure this board is designed to output 3.3V instead of 5.2V. Why? Because if you calculate the output voltage from the reference voltage, you arrive at 3.26V.
This formula comes from the datasheet of IC9304 to calculate Vout:
(R9337/R9338+1)*Vref=
(12.7KOHM/7.87KOHM+1)*1.25V=3.26V
Therefore the voltage is regulated to be ~3.26V
I think originally there was intended to be the mosfet Q9301 which switched the path between PIN1 of IC9304 to ground to a path with less resistance, thus increasing the output to 5.2V. They probably decided they don't need 5.2V at all, marked those components as NC, but left the labels of the rail as 5.2V, as they could output it depending on the version of the power supply.Comment
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Hello everyone,
I've been encountering some perplexing issues with my ASUS ROG STRIX GTX 1660 Ti Gaming OC and am seeking insights or potential solutions from the community.
Symptoms:
Initially experienced a gradient-style black screen from the top.
Poor performance: ~10 FPS on the lock screen.
Encountered artifacts followed by black screens.
After addressing a PSU-related problem, still observed a performance drop (~10 FPS).
Upon using GPU-Z:
Memory size shows as 0MB.
Unknown bus width and bandwidth reported.... -
Hi all,
I have a CRT (Acorn AKF12, based on the 240V version of the Philips CM8500) which has stopped working. It's making a high pitched noise but not too high. I know this is symptom of a faulty flyback.
What happens when a flyback fails? I see that the main voltages out of the PSU are not reaching rated values, as if there is a short.
There are supposed to be 125V/26.5V/15.5V outputs but I am reading something like 48V, 10V and 8V. If I unplug the PSU from the rest of the PCB, I can measure the expected values.
Can it be a short somewhere... -
I bought a use Intel I9-12900KF CPU and i received it damaged. But it looks like only one component one the backside is missing. But the solder pads looks fine.
I already "googled" it and compare the backside picture of other LGA1700 12th Gen CPU. They look all the same, no matter if its an I9 or an I3, even the Pentium. And at that spot should be a capacitor.
Does anyone have a schematics or assembly diagramm of the alder-lake cpu-backside? Or just know what size and value i need to replace the missing capacitator.08-06-2025, 01:36 AM -
Board had no history of liquid; unsure of drop history, but no signs of damage of any kind worth noting.
Charger sitting at 5v/0a. PPBUS is at 1.9v-0.9v steady cycle (peaks, drains, loops). Confirmed CHGR_EN_MVR is missing, but DCIN was reaching ISL just fine, so replaced ISL--no change at all. Confirmed pp3v8_aon is also missing--and being unsure *exactly* which signal appears first (or if they are simultaneous), I inspected PMU/U8100 area and found no shorts, but also found PP3V8_AON_MPMU_ISNS_VIN missing (not shorted). Replaced U8100 just in case (have had them fail in weird ways),... -
Hi everyone,
I recently acquired this card from a seller who was selling a PowerMac G5 for parts. He mentioned that the video card was probably broken too.
Upon closer inspection, I can tell the reason why it won't work: it's missing a bunch of CAPS! (it's also missing an inductor - 1.0uH).
It's a nice card as it's one of the few AGP cards that will support 2560 x 1600 resolution on a PowerMac G5 using a 30" Cinema Display.
Looking at the card, it appears to be missing the following:
1x 1.0uH inductor - orange square
2x...
Comment