Questions tagged [damage]
The damage tag has no usage guidance.
192
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SMD soldering with hot air
I'm fairly new to SMD work but have worked for a very long time with more tradition soldering.
I've tried various ways to remove faulty SMDs (ICs usually) with my hot air gun but have a reoccurring ...
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How badly did I damage board with first time soldering to remove component? [closed]
First time soldering. Is this thing unusable or might it still work?
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102
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Strange Resistor Situation
I am looking at a schematic for an RF sensing switch, and I notice that there are two resistors that are marked in the schematic as 18 Ω resistors. They are 2512 SMT types and are installed in ...
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Very loud sound without smell: electric arc?
Short version:
Extremely loud sound a few seconds after power on (400 V AC, 3 phase) in high humidity, no smell: is it arcing? Is it possible that a component exploded without smell?
Long version:
...
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142
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Damaged ATMEGA328P despite clamping diodes and current limiting resistor
I have a custom PCB designed to interface an Arduino Nano's ADC pin that had 12v from a bench power supply inadvertently connected to a header pin meant for 5v input. The ATMEGA328P now gets extremely ...
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Is there a risk of damaging built in RF components having several Iridium SBD 9603N modems active close to each others?
I use Iridium SBD 9603 N modems in some hardware (oceanographic buoys). I use high gain antenna, typically the setup is based on https://www.sparkfun.com/products/18712 and https://www.sparkfun.com/...
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guitar amp experienced over-voltage [closed]
Disclaimer: I am not an electrical engineer, I made a mistake which left a piece of equipment in what feels like it should be a salvageable state, but I don't know where to start correcting it.
So, I ...
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How to find out if the PIC microcontroller is good or dead?
I am working with a PIC microcontroller (part number dsPIC33FJ64MC802).
Previously I was able to program it fine. But today, I have powered the PCB which contains the PIC microcontroller, then ...
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Testing out a bridge rectifier if it works with only a multimeter
Indulge me here with this scenario, but suppose the electronics shop I'm sourcing parts have dubious, faulty semiconductors parts -- damaged, counterfeit, etc. What have you.
How do I test if a bridge ...
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223
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How to fix a broken relay that's still clicking?
Last week, one of my cooking plates was not working any more.
I was able to track the problem down to the cooking plate relay (Finder relay type 45.61, 14Vdc, 16A, 250Vac).
This relay still makes ...
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2
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I keep Blowing up my i2C (ISO1540) isolator when plugging and unplugging my battery
I am using a ISO1540 to read the SMBus of some BB2590 batteries. The relevant part of the circuit is shown in the images below
The issue that I am having is that sometimes when connecting or ...
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Would a Hall effect sensor be damaged by gross saturation?
There's this old question that is almost what I'm looking for, but not quite.
I want to make a current direction sensor - I don't care about magnitude - for a car starter battery. I care about the ...
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General guidelines to avoid damaging RF components
So, I am a young researcher in physics and use RF components like splitters, mixers, couplers, amplifiers, etc. These are not high voltage amplitudes at all - at most a few volts - often hundreds of ...
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Is this inductor ok?
I was cleaning a 10+ year old LCD TV with a damp rag and noticed an ozone-like smell. I assumed a chip was frying or something was arcing. I unplugged it, gave the power supply some time to discharge, ...
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Fluke 393 checked resistance on a live circuit wonder if I damaged my meter
I have a fluke-393 multimeter and I was testing voltage on a 480V circuit didn’t realize I was on resistance and when I put my probes on the circuit there was a small arc, quickly taking my probes off ...
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Possible degree of damage to PSU
The following PSU accidentally got 400 V instead of 230 V at J6. There is a fuse built into the power switch, which is connected to J6. The fuse blew on the original incident. Trying to replace the ...
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102
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Small indentation in rechargeable battery
I bought a small lamp and opened it up. I used a knife to carefully separate the top from the bottom shell and I am pretty sure I didn't insert it that much to create the two points on the left, and ...
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I ripped the lead off this film capacitor by mistake - is it beyond repair?
As the title says, I accidentally ripped the lead off this film capacitor. It was the only one I had - am I out of luck, or can this be soldered back on? I've provided photos, including one under my ...
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Stopping electric arcs between layers in PCB - big PCB burn
Firstly, let me preface this with the fact that I am not interested in chastising the user, and I am not interested in looking at the original source of the arc (it was a tool accidentally breaching ...
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386
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Can an LCD be damaged by a low battery voltage?
I've got a digital alarm clock where the battery got really low, to the point where the display was hardly viewable. I assume that the voltage must have really dropped. I put some new batteries in it, ...
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Is it possible to replace 50N06 chip? [closed]
Problem:
I've got an LED light bar that has started blinking on half of it. I disassembled it and found an apparently damaged area on the PCB inside.
Question:
What is this chip? Would I have any hope ...
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What was this completely destroyed piece?
Yesterday morning, I was preparing my tiller pilot (auto pilot for small boats) but it sounded like something was loose inside. When I opened it up, I found a damaged rubber sealing and the piece in ...
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Can chips be sensitive to mechanical stress after an electrical incident?
Is it possible to electrically damage a microcontroller (or any chip) in such a way that it becomes very sensitive to mechanical stress?
Some background:
We are developing a board with 7 identical ...
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Help identifying silver oval capacitor
[Edited to stay on topic]
My induction hob recently went 'pop'. I believe I have a blown capacitor. "C24" on the main board. It is showing subtle 'bubbling' at the end.
My issue is that I ...
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why did my powered usb hub kill my computer's usb port? [closed]
Curiosity kill the computer port. But why? I bought a 4 port USB 2.0 hub. I removed Vcc and Gnd from the Type A connector of the hub. Then I powered the hub and inserted a USB stick into one of the ...
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107
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Higher PWM frequency than rated for device
I've an electronic speed controller (ESC) rated for a maximum PWM frequency of 48kHz. As I was working on a project I was generating PWM. This PWM signal was connected to the ESC. After I noticed that ...
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337
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BJT collector power limit in pulsed usage?
Assuming that my circuit respects the voltage, current, and thermal limits of a BJT, can the device be electrically damaged by exceeding an instantaneous collector power limit?
In other words, are BJT ...
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265
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Is a damaged charging cable safe to use? [closed]
I have a M1 Macbook Pro 2021, 14". The charger that comes with this device is the 67W adapter and a USB-C to MagSafe3 adapter. Unfortunately, today I didn't see the charger on the ground and hit ...
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128
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LED Dimmer circuit accidentally damaged
I am currently working on a prototype system that uses these 3w LED drivers (I am using the one with the picture at the right). It uses the XL4001E1 CC DC-DC converter capable of outputting 700mA to ...
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AMD 5600x microprocessor substrate damage
I hope this question lies within the guidelines.
I have acquired this AMD 5600x microprocessor for a very low price. It was dropped on the corner (see picture) where we can see some delamination.
The ...
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361
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I2C communication pin and/or device getting damaged
I have a Raspberry Pi communicating with some I2C client devices. Occasionally either the I2C client device fails or a Raspberry Pi pin (one of the I2C pins) is damaged. The only thing I can conceive ...
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What kind of component is this, and is it damaged?
My central heating controller stopped working. It's essentially an AA battery powered device with a thermistor, some buttons, and an LCD screen, which lets me program desired temperatures for various ...
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I have some salvaged PNP transistors, should they conduct forwards past a particular voltage or are they damaged?
I have salvaged two A1490 transistors from an old amplifier. Both of them, if presented with a potential difference across the collector and emitter above about 13.5 V start conducting, even if there ...
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Why does broken monitor have vertical lines [closed]
I unfortunately dropped a pointy object and it pierced a tiny area of my monitor (AOC U32E2N). I was surprised to see that the whole area of the impact (where physical damage can be seen) is ...
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What’s the likely cause of ‘buzzing’ from this hi-fi speaker? [closed]
Something has happened to one of the drivers in my speaker and it’s now ‘buzzing’. (Our cleaners could have knocked the speaker over). There’s no obvious (to me) signs of damage having examined the ...
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Is there a chance that a DC/DC controller was damaged when a bad feedback network caused its output to exceed its absolute max limit?
I'm currently debugging an issue with a DC/DC controller. The part is a LTC3833. It turns out that the engineer who was working on this accidentally pointed to incorrect part numbers for the passive ...
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Is it possible to damage a PCB by plugging an USB 5-pin header the wrong way?
I am using a Cliff CP30100 dual USB socket to easily switch between two PCBs (see wiring diagrams). On the inside, there is an USB-C to 5-pin cable for one PCB, and a Mini USB to 5-pin for the other. ...
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Which components tend to damage first of a power supply for high voltage?
Which components tend to damage first of a power supply for a voltage spike or surge?
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What is the name and function of these components?
Following are two pictures of a smartphone's main board (Moto G8 Plus). The first one is for reference; the second one is the one I got to repair a phone.
Questions
What are the golden sheet (...
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Implications and cause for static discharge
For months, I've had a potential buildup culminating in static discharge when touching the chassis of my macbook pro at ONE location. No source could be identified (no ground leakage – I checked with ...
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Can I use an Apple charge Cube (5W power) through a Ripcord 9V to USB to feed a Roland SP 404 (2.7 W draw) Safely?
I am asking this as I want to be extra sure this setup does not damage my 404 Sampler as its an expensive item of mine and it's very dear to me so I want to be careful. Here is the scenario:
I have ...
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Expected behavior for damaged transistor
The generic question I have is what's the "expected" behavior for a damaged BJT. Let me add more color..
I was trying to fix my kid's toy where a motor would run even when it wasn't supposed ...
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What check can Ι perform to verify that a load cell is operating properly?
About five years ago I was tasked to develop the software for a small custom made testing machine (everything is custom-made from frame, to the measuring system). Last year, I was volunteered to &...
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PCBA failure - white "fluff"
I have a PCBA that seems to have failed due to poor wiring (no water damage). The screw terminals are for 230V AC input and electrical load relay.
What isn't clear to me is what exactly is the "...
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370
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Identify and source replacement common-mode noise choke
I have a circuit where the marked inductor common-mode noise choke in the image below is damaged.
I am having massive trouble sourcing this inductor common-mode noise choke anywhere. No results on ...
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Substitution for 0.1Ω 2W metal film resistor?
I'm attempting to repair a Pure Sine Wave Inverter.
I need to replace a damaged 0.1Ω 2W metal film resistor. I found the part that should work on digitkey: https://www.digikey.com/en/products/detail/...
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730
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SMD SOT-25 identify component
Can I ask for help in identifying the following SMD component? Package is SOT-25. Marking is bPCGD .
Probably is voltage detector but I dont know his parameters. It is a component of mainboard IP ...
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Repair pads on PCB
I've accidentally used too much force on the board while trying to remove a flex connector and so I've removed a lot of PCB pads as well (see image).
I have a new flex connector, but I do not have ...
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Water damage repair on solders
So this is the cicuit for a 1h0257j VolksWagen polo vacum pump for central lock. I got it for practice since it was replaced.
The question the problematic part seems to be a burned soldering, it is ...
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Can I bypass a trace from the diode to the solder point with wire?
I'm working on the button/power motherboard of an X-Box one's controller - the menu (start) button doesn't work.
I think there might be damage to the trace when I followed the trace to the solder ...
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