I have these 2.1 computer speakers to repair and on the board I found a burnt resistor but I can't read the value. The colored rings are all burnt beyond recognition. All other components seem ok and the speakers turn on but there's no bass coming from the sub woofer. First I want to replace the resistor with the correct value then move on to troubleshooting the other components. Will post some pics tomorrow along with the make and model. Can someone help??
-
Guns don't solve problems. I'll take 12
-
Re: 2.1 speakers burnt resistor of unknown value
BumpGuns don't solve problems. I'll take 12 -
Re: 2.1 speakers burnt resistor of unknown value
You should first find the cause of the burnt resistor before replacing it or the resistor may burn up again.Comment
-
Re: 2.1 speakers burnt resistor of unknown value
As always, make pictures... post here.
Some cheap speakers use common amplifier chips, the board may be the reference board in the pdf with the specifications for said amplifier chip or a small variation on that reference design.
With some pictures, someone may be able to suggest a proper resistor.Comment
-
Re: 2.1 speakers burnt resistor of unknown value
I already found the culprit. It was an amplifier chip with makrings TDA2030A (yet to find a replacement) seen in the lower right corner picture and I already replaced the resistor. Wen I removed the capacitor I couldn't read the values but funny enough I could still measure it
It was reading 217 ohms and it was in parallel (Or at least I think it was in parallel 
) with two other 220ohm resistors so I'm assuming it's also a 220ohm one. Will post an update later on.
Attached FilesGuns don't solve problems. I'll take 12Comment
-
-
Re: 2.1 speakers burnt resistor of unknown value
Update: I replaced the TDA2030A and the 220ohm resistor and all is running fine. Just wondering how can a badly burned resistor give it's correct value after it's been taken out of circuit? Or maybe it wasn't shorted, just the covering layer of the resistor was burned from excess heat while the insides were still good?Guns don't solve problems. I'll take 12Comment
-
Re: 2.1 speakers burnt resistor of unknown value
That can happen, usually with carbon-based resistors. They can burn all paint and isolation, even smoke, and they are still good.Comment
-
I've got a 240v LED uplighter which isn't working. Pulling it apart shows a clearly burnt resistor on the circuit board, and I'm hoping some of you will have suggestions on what to replace it with. First, here are some photos. Power comes in, through the fuse and choke, then through the big blue variable resistor labelled B500K (ignore the similar blue component at the bottom - it's a simple switch for an attached reading lamp). It then passes through the burnt resistor (or at least did once), through diac DB1 and the unburned 30 ohm resistor to the gate of the triac.Now I assume there's a simple... -
Hello Badcaps!
I am trying to troubleshoot my Allen & Heath Xone:02 DJ mixer. I have had this for somewhere close to 20 years and have played music through it in one form or another pretty much every single day since I've had it, though these days it's usually from a wireless streaming receptacle (Apple Airport) more than the turntables that are also connected to it.
This week my music stopped working, and after a bit of a wild goose chase, I realised my mixer was dead. I checked the 500mA fuse in the device beside the power supply and found it was blown, so I replaced... -
Hi
I have an Ersa rds 80 soldering station which has developed a fault and just showing err on display
I have found a burnt resistor on pcb can anyone help me identify this resistor if you have a circuit diagram or similar unit
The printed circuit board markings are rd80 ver 2.0 and the resistor in question is R6
Many thanks... -
Hi
I am trying to repair an ancient Dell 2209WA Monitor which suddenly shut off with a pop sound. On investigation found that one of the fusible resistors had blown. Further investigation identified multiple components as faulty because of which the fusible resistor blew. Please refer the attached circuit diagram showing the components that were found to be damaged.
1. FR950 - blown fusible resistor - 0.2 Ohm 1W
2. Q950 - shorted Q950 MOSFET - 650V 10A N Channel Mosfet
3. R835 - Blown Resistor - 20KOhm SMD resistor
4. D930 - Shorted Schottkey Diode... -
More Lo-Fi speakers and another DIY surround repair.
The patient this time: a pair of Philips F9217L-50R speakers from a budget Philips rack/component system from the '80's. The system belongs to my brother in-law… or actually his parents. However, they didn't want it when they moved houses and he liked it anyways, so he ended up keeping it. It's a pretty cool-looking vintage system with a wood/veneer cabinet and shelves for records and cassettes. Unfortunately, I didn't get a chance to take a picture of it or get the model #'s (but maybe next time I visit, if anyone is curious?)
...
Comment