Questions tagged [replacement]

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Replacing lost SMD capacitor from another board

I was trying to fix a board and I lost an SMD capacitor. On the diagram it says "10UF/6.3V." I have another board for another laptop and I found these on the diagram, which one is the ...
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1 vote
1 answer
64 views

Replacement relay - slightly different specs

I have an old kitchen range hood whose lighting suddenly stopped working. With my limited knowledge and capabilities in this field, I was able to access the PCB just to see that the power relay is ...
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Dewalt radio power supply

Can someone tell me what chip U2 is in this picture?
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2SB1241 Transistor replacement

I have a Peavey PV8 USB Mixing console which doesn't turn on anymore, the problem is a burned PNP switching the +15V rail. The Marking of the transistor is B1241 but due to the 3-SIP package im pretty ...
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1 vote
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81 views

If an IGBT's collector-emitter max voltage is 600 V, Do I need 1 kV rated capacitors on the output side?

I'm fixing this solar PV diverter (pictures attached at the bottom of this post), other than the traces it has a blown IGBT and 2 capacitors. The datasheet for the IGBT (model FGH40T65SPD) is here:  ...
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1 vote
1 answer
68 views

Can I replace an SRAM chip with a faster one?

I need to replace an SRAM chip with an access time of 25ns (AS7C256-25JC). How important is the access time? Can I replace it with one with a lower access time, such as the AS7C256A-20JC at 20ns, or ...
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Operate servo based on AC voltage: solenoid replacement

In short, I’m trying to find a substitute for a solenoid in a system that was operating based on 120V. The servo needs to rotate a little shaft about 45 degrees when the voltage comes on, and then ...
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Fried diode - need help buying replacement

Full disclosure, I'm not an electrician by any means. My dad was an electrician in the Navy, but we lost him last year. Since I don't have him to look to anymore, I'm hoping I can find some help here. ...
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3 votes
1 answer
362 views

Have cross reference books ceased to exist?

Back in the "good old times" when I had a device fail I could grab my trusty old transistor cross reference book and find a replacement part with the same footprint and comparable parameters ...
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1 vote
1 answer
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Replacing 12V 19AH lead acid battery with 12V lifepo4

I have a Stanley PPRH7DS battery charger that came originally with a 12V 19AH lead acid battery. This battery has since given up the ghost and I am looking to replace it. Last summer I constructed a ...
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2 votes
1 answer
171 views

What does "FB" for a fuse mean?

I have a blown GE 250v 20a FB WB27X27316 that I need to replace. Unfortunately, GE doesn't have them in stock for another 3 months. I want to replace it with another off-the-shelf fuse, but I don't ...
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1 answer
62 views

Defective Transformer Replacement

I've been working on repairing a TV psu, and discovered that the transformer in it is faulty (reading O.L. on every combination of pins except for diagonal in ohms mode on the DMM) I've been looking ...
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Help with identifing replacement parts [duplicate]

I am still learning about electronics and was hoping for some help regarding two components I am trying to replace (due to a faulty connector and my stupid fault). With the help of @Lundin, they ...
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Compatibility of package/footprint names

Whenever I look up footprints and packages of components I am confused by the name, for example: SOT-23 and SOT-23-6 The 6 seems to stand for the number of pins. But for: SOT-23 and SOT-23-3 It seems ...
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1 vote
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Finding replacement battery

I would like to revive an older gadget (GT-100 GPS tracker) that is still functional but has a dead battery. However, I am unable to find detail about proper battery type. The original battery says ...
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1 vote
0 answers
80 views

eMMC chip change. Does not work for unknown reason

Because of the chip crisis, I had to use (the only ones which were available at the time) different eMMC chip. Originally it was MTFC16GAPALBH-IT, but I have temporarily replaced it with MTFC4GLWDM-4M ...
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Need help with a replacement thermistor

I recently bought a used IKEA ceiling light however when getting it home noticed that it seems the live wire is connected to a thermistor? which then has another short wire where you connect to mains ...
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305 views

MOSFET identification for hoverboard repair - markings SW FK2J3 95N68A

I am trying to fix a Jetson Plasma hoverboard. I have a removed a few MOSFETs that I believe have failed. I have searched Digikey and Mouser and have been unable to identify a replacement part. Here ...
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What do you test when changing parts [closed]

Let's say some parts within one of your products are discontinued. You already have a replacement that seems to fit from specifications. What tests do you usually conduct to verify proper operation? ...
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2 answers
375 views

What do I have to look for when replacing a MOSFET with a different model? [duplicate]

We are currently repairing the memory rail of a GPU and because a MOSFET burnt out, we would like to replace it. The issue is, that we only have one that is a similar model, namely we would like to ...
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1 vote
0 answers
117 views

Cree LED problem

We have a production circuit of 24 series/parallel LED arrays. Blocks of LEDs fail on power-up. Has anyone seen this before? The sequence of events is: An LED tests as bad in circuit. LED is removed ...
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2 votes
2 answers
296 views

Replacement for low resistance JFET current limiter?

A classic way to protect opamps from excessive input current and still preserve a low source resistance (for noise reasons) is to use dual JFETs in combination with rail-clamps internal to the op-amp. ...
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1 answer
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Neon bulb lamp replacement for surge suppression

I'm restoring an HP 141T and it has a broken neon lamp which is used I believe as surge protection in the following configuration: On the right is the CRT. I believe the only purpose for such lamps ...
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1 vote
1 answer
48 views

Replacing 10uF tantalum capacitors with X7R in ADM2587E circuit

I'm working on some device with isolated RS485 based on ADM2587E transceiver with integrated high frequency isolated DC/DC converter. This IC is a bit tricky if you need low EMI, because DC/DC ...
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Looking for a pin-compatible to LT1013DID rail-to-rail in/out op-amp

I have designed a circuit using LT1013DID (SOIC 8 footprint) op-amp and while Spice simulation worked, I forgot about input common-mode voltage limit (which it seems is not simulated) and thus need an ...
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1 answer
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Help decode/identify/guess this blown ceramic capacitor?

My monitor's backlight died (can still see screen with torch). Found a blown ceramic disc capacitor. The problem is it's partly exploded over the values. I'm hoping people here might have a better ...
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6 votes
3 answers
598 views

What's the right replacement for vintage "glass cloth insulation" that transfers heat in Variac?

I ripped apart a broken 1950s-era Variac autotransformer to diagnose an internal short in the core, and found a layer of gooey insulating fabric mat between the coil/taps and the mounting plate: The ...
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Can I replace one with the other? L7805CP, L7805CV

Are those chip equal in a circuit? L7805CP, L7805CV Can I replace one with the other to try to fix a broken circuit board?
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1 vote
2 answers
181 views

Is there are better component to use rather than multiple diodes?

I am a long time computer programmer, but am fairly new at creating my own circuits. The project I am working on currently is functioning properly, but I thought there may be a more elegant solution. ...
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1 vote
2 answers
541 views

Can I safely put a 9 volt battery across 12 volt auto battery

To change out my automobile battery some sites say, to save auto memory devices, I should procure a gadget using a 9 volt battery which you hook up to the auto battery cables just before you undo them ...
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0 votes
0 answers
57 views

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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0 votes
1 answer
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Help finding a replacement part? [closed]

I have a subwoofer that my friend and I found so I do not know too much about it. When I was transporting it, it fell and one of the knobs on the front was broken. I took it apart to see if I could ...
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0 votes
1 answer
590 views

Need help with weird audio wire colors

I would like to replace my broken earphone's 3.5mm audio jack. However, I am not able to indicate which wire is the right (red) and which is the left (green). I see the red and green wires but they ...
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0 votes
1 answer
98 views

MOSFET Rds(on) development

I'm considering making a replacement solution for an automotive fan output stage. The original part gets quite warm and tends to be unreliable - it's cooled with massive fins and sits directly in the ...
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0 votes
1 answer
63 views

IC replacement 24LC16B-I/P

I apologize for my ignorance, but does a brand new IC need to be programmed or are they already factory programmed ready to be solder? I have an M-Audio 49 MIDI controller piano with a bad 24LC16B-I/P ...
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1 vote
1 answer
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Vintage Pocket Radio Transistor Replacement is Oscillating

I have an old pocket radio which uses silicon NPN transistors for the mixer and IF stages. I replaced 2 of the IF transistors and the unit functions, but the new transistors are faster than the old ...
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0 votes
1 answer
262 views

What are the important specs to look after for IGBT replacement?

I have a MC2100ELS-18W motor controller and after inspection found that the IGBT is shorted, the part number is IRGPC40K I suppose this is a discontinued part and I do not want to buy from China and ...
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3 votes
1 answer
391 views

How do I replace this bike light cache battery?

This Luxos U dynamo powered bike light has a cache battery that provides backup power for the light when the dynamo isn't providing power, and it also provides power to smooth the USB charging that it ...
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3 votes
2 answers
2k views

3.5mm Audio Headphone Jack

I have a broken headphone audio jack from an electronic keyboard. With the jack broken, the speaker audio no longer functions. The manufacture no longer supplies the part as it has been discontinued ...
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1 vote
1 answer
109 views

-30V power supply for HTS6520

Story Received a Philips HTS6520 for free however the subwoofer (and remote) is missing, no cables at all, so unable to use it because the sub also provides the power (read on to see what I have done)....
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2 votes
1 answer
303 views

Suitable Substitute for this Varistor MDC Z750 / 40

I am in the process of restoring a vintage EZGO Golf Cart and have came across a component I am unable to locate within the generic golf cart electrical diagram. This varistor is from a 36 volt DC ...
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1 vote
0 answers
86 views

Input voltage on transformer

I’m replacing a transformer on hot tub. Markings on original were obliterated from rust. New transformer is marked as follows. 0 v blk wire, 115 v white wire, 230v red wire. The transformer receives ...
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0 votes
1 answer
123 views

Help finding replacement parts? [closed]

My mum's sewing machine released its magic smoke, and while I'm reasonably adept with a soldering iron, I don't have sufficient experience with electronic components to do this all on my own. I have ...
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1 vote
2 answers
137 views

Altium PCB messy Components Placement

I have a problem with PCB. When I click Design -> Update PCB Document my components are passed to PCB in a messy way. I couldn't solve this problem. Is there any way to solve this?
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1 vote
1 answer
617 views

How can I replace this SMD diode?

This "742 PG" seems found to be nowhere in any place. What is the best SMD diode that can replace it? It is from Lenze PCB for the 8211E variable frequency drive. Please show me the way to ...
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0 votes
1 answer
145 views

How does a USB-C to Lighting Adapter work / How to replace them? [closed]

So, I am fairly new here, and to be honest I have no clue if this is the right place to ask. I am currently thinking about replacing a Lightning port with a USB-C port, just for power supply. At first ...
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1 vote
2 answers
180 views

Replacement for antique fan capacitor [closed]

Could anyone recommend a replacement capacitor for an sk, mp capacitor 2uf 350v?. This one was used as a starter for an old fan. Thanks.
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3 answers
306 views

Replacing the capacitor on an old Philips amplifier

My Philips amplifier broke down (model FA153) and my friend told me it's likely the capicators have worn out (they were produced in West Germany ;)) I am quite the layman in electrical engineering, ...
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-1 votes
1 answer
102 views

Which nichrome wire would use to recoil this heater element

I need to re-coil this. Which nichrome wire would you use? This is a fan speed controller. For perspective the place width is about an inch and there are two plates with about 15 winds each. This will ...
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1 vote
0 answers
424 views

Replacing a Li-Ion battery with a capacitor and power supply in a bluetooth speaker

I have a Philips BT3500 speaker with a dead Lithium Ion battery. I want to be able to use the speaker without the battery - using just the power supply. It used to work for some time with the usb ...
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