Questions tagged [replacement]
The replacement tag has no usage guidance.
112
questions
1
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1answer
41 views
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 ...
2
votes
1answer
108 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 ...
0
votes
1answer
58 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 ...
0
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0answers
50 views
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 ...
0
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0answers
36 views
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 ...
1
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0answers
55 views
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 ...
1
vote
0answers
66 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 ...
0
votes
1answer
78 views
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 ...
0
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0answers
143 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 ...
0
votes
1answer
68 views
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? ...
0
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2answers
61 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 ...
1
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0answers
103 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 ...
2
votes
2answers
211 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.
...
0
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0answers
22 views
substitute of SE2431l front end ic
I am working on the project with SE2431l front end ic ,unfortunately the lead time of the ic is very much. So i was searching for the substitute. I found RFX2401C but the pin to pin configuration is ...
0
votes
1answer
82 views
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 ...
1
vote
1answer
36 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 ...
0
votes
0answers
40 views
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 ...
0
votes
1answer
121 views
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 ...
0
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0answers
50 views
How to find a transformer for a dry cleaning machine?
My dad asked me to help him find a price estimate and figure out the ordering process for a new transformer for his dry cleaning machine. He's not that fluent in English and isn't too comfy using the ...
6
votes
3answers
583 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 ...
0
votes
1answer
87 views
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?
1
vote
2answers
178 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.
...
1
vote
2answers
406 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 ...
0
votes
0answers
48 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/...
0
votes
1answer
42 views
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 ...
0
votes
1answer
393 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 ...
0
votes
1answer
83 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 ...
0
votes
1answer
52 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 ...
1
vote
1answer
126 views
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 ...
0
votes
1answer
183 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 ...
3
votes
1answer
321 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 ...
3
votes
2answers
1k 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 ...
1
vote
1answer
87 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)....
2
votes
1answer
177 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 ...
1
vote
0answers
80 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 ...
0
votes
1answer
96 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 ...
1
vote
2answers
123 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?
1
vote
1answer
459 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 ...
0
votes
1answer
116 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 ...
1
vote
2answers
132 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.
0
votes
3answers
234 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, ...
-1
votes
1answer
92 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 ...
1
vote
0answers
334 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 ...
0
votes
0answers
248 views
Replace capacitor with open circuit or short circuit?
We have this circuit, where potential difference between capacitor plates is zero, and no current flow through it too. So I want to draw a simplified version of this circuit where is composed of just ...
3
votes
2answers
219 views
Is a 2N3906 an appropriate replacement for a BC158(B) in audio amp circuit?
On a long but educational process repairing a vintage German stereo. I have identified a failed (shorted) PNP transistor in the power amp section. (Schematic with highlight is below.) The part on the ...
0
votes
1answer
105 views
Can anyone help to identify this blown MOSFET? Top markings seem to include F50, "ON" in a circle, 3N and "RE4T" in a circle
I am trying to repair a PCB out of the welder. One of the problems I have found is a blown MOSFET. I have tried searching for a replacement with no luck, as I don't have a complete code. I have posted ...
0
votes
1answer
71 views
How do I replace or fix this electronic chip? [closed]
I have a device that runs on a 3.8V Li ion battery.
A few days ago it stopped working.
I screwed it open, took out the battery, and could identify this seemingly fried (?) resistor on the PCB:
Am I ...
1
vote
1answer
373 views
Replace amplifier IC with a class D amplifier (AN7133N with TPA3116 board)
Today I received this nice 90's Panasonic RX-CT900 boombox in the mail.
The specs claims it is 2x60W PMPO (PMPO b**llsh*t throw-of- a-cliff specification) but in fact it is just 2x5.5W RMS (Panasonic ...
0
votes
1answer
269 views
Replacement for E402/J402/LS3954 JFET?
I've come across old synthesizer schematics for an oscillator which makes use of a couple E402s. I am looking for a suitable replacement, and I don't think the specs have to be spot on at all, but I ...
0
votes
1answer
42 views
Removing single 1212 (3030) LED
Is there any way to remove and replace a single 1212 (3030) LED from a heat-sink board as shown in the images?
