Questions tagged [component-failure]
For questions about what causes components to fail, how to prevent component failure, and component failure modes (e.g. fail open or fail short).
97 questions
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How to use the military handbook for reliability prediction of electronic equipment
I want to predict the reliability of the components for which I am using the Military Handbook — Reliability Prediction of Electronic Equipment (MIL-HDBK-217F, 1991, Department of Defense). Is there ...
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Why did all my surge protectors smoke when my home became ungrounded?
I live in North America and the ground/neutral wire between the utility pole and my home was severed. When this occurred, all my surge protectors fried.
Why would this happen?
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What failures can occur in a SATA HDD 3.5" and controller when +12V power to the HDD is held? [closed]
If, after turning off power to the entire ATX x86 PC, a voltage above 10V is maintained on the +12V SATA HDD 3.5" power line for more than one second, what failures might occur in a (simple non-...
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100 ohms resistor is unintended increase value to Mega ohms after one to several years?
I design a Flyback converter for a PC board or Panel monitor. They consummed about 14W to 20W.
After normally work for years, the 100 ohms at feed back, which is used for limiting current of LED ...
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Failure mode of electrolytic capacitor
simulate this circuit – Schematic created using CircuitLab
In the doubler 110 V ac (household wall socket) was applied to the left of the first (highest left) capacitor which is 33 µF
...
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Relay seeming to weld/unweld randomly (and continuing to click when "welded")
Main question :
I'm observing some very strange behavior on some relays (NO) on our PCBs:
the relay sometimes stays closed when I turn it off from software (as if it was welded closed)
but I still ...
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How does a BMS prevent extreme under voltage damage from a battery cell when a component failure occurs on an IC?
I am designing a 10s battery BMS and I am really trying to dig deep into safety precautions for batteries and I have a good foundation for most protections. In order to prevent short circuit I will ...
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Toasted PCB region of power amplifier
I was going to replace a relay on an Alesis RA-150 stereo amplifier (a common failure mode) when I noticed some scorched 2W resistors (R401 and R402) and what appears to be an almost burned area of ...
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LM2678 regulator blew up during normal operation, trying to determine cause
I recently had an LM2678 switching DC regulator fail and I'm trying to figure out why. It was the 5V output version, with a 24V input voltage. The load at the time is difficult to estimate, but was ...
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SOT-23-06 with w538 marking on top
I couldn't find the match. I don't know where or how to find it. The board is from a power supply for a speaker.
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Root Cause Analysis - Catastrophic Failure of ULN2803 IC [closed]
I have a relay board operated thru Darlington array ULN2803. Both the ICs underwent catastrophic failures. I am looking for explanations about this failure and what can be done to avoid these in ...
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Why would a 20 year old MOSFET fail?
I have an old MOSFET power amplifier which dates from (I think) 1997 or so. It was made by a well known British manufacturer. I bought it used about a decade ago, and it has worked faultlessly.
A few ...
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VDD and VSS pins shorted together
I have a PIC18F2420 MCU taken out of a PCB. There is a short between pins 8,19 and 20 which are VSS,VSS and VDD respectively.
Has this MCU completely failed?
One thing I have noticed when the MCU was ...
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N-MOS failing short on my PCB
I'm currently testing a PCB I designed. One of the MOSFETs, Q5, failed yesterday for the 3rd time, and I haven't managed yet to find out why.
Main facts:
N-channel MOSFET: CSD19538Q2T
Rated (never ...
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PWM Dimming of a Low-Voltage DC Incandescent Filament (Thermal Shock?)
I plan on driving some Numitron tube filaments from an IV-16 tube (datasheet here). For ease of access I'll give the key specs here:
Nominal filament voltage: 3.15V
Max filament voltage (steady-state)...
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