Laney LV300t crackling problem

Adorerofblood

Hi All

I've been having a problem with my Laney LV300t lately (http://www.laney.co.uk/show_prod.php?prod=lv300t)

While playing, it randomly gives off loud 'crackles' (the sound it makes when you plug a cable into something that is unmuted). It also now-and-then gives this crackle when adjusting the clean channel volume dial on the amp. I originally thought the problem was with my guitar, but I tested this with multiple guitars and multiple cables.

Could it be a problem with the amp's internal electronics, or just maybe the input connector?

Any advice on what to try would be appreciated

Mannemarak

My Laney LV200 does the same thing, but more scratching, it can be your input jack, but my oppinion (not worth much) is the POTS that has dust or some other gunk in it.

guidothepimmp

Sounds like dirty pots, give some switch cleaner a twirl and see what happens

AlanRatcliffe

Could be dirt on (or worn out) jacks or pots. Can also often be dirt on the switch parts of the effects loop jack sockets. Occasionally it will be related to dry joints on the circuit.

- Spray your jacks with switch cleaner (pure isopropyl alcohol) and insert a jack a few times to scrape off any oxidisation.

- Turn your pots back and forth a dozen times to clean them - if the amp is on and you hear crackling when you do this, chances are that was the problem. NB: pots are self cleaning and dirt problems usually come from standing in the same place too long. You should never flush pots with switch cleaner - it flushes out the lubrication and the pots will wear out swiftly after that. If the pots are the problem and a few turns does not sort them out, you need to replace them.

- If it's a valve amp, remove the valves one by one, spray the socket with switch cleaner and reinsert - do this two or three times to make sure you have the best contact possible. If a valve is very loose in the socket, refer it to a tech for replacement.

Any more problems after that, refer to a tech.

The usual caveats and safety warnings apply - do not work on the guts of an amp if you do not know how to do it safely. High voltages... blah... potential of life threatening shocks... blah... you too could be a Darwin Award contender... blah, etc..

guidothepimmp

Alan, good stuff, didn't know switch cleaner messed with the lube.. I should prob stop doing that then :-[

Adorerofblood

Thanks guys! I'm going to try these out this weekend ?

Adorerofblood

Just a bit of feedback - simply turning the master volume pot back and forth a few times sorted the problem out!

Thanks so much ?

AlanRatcliffe

Good to hear!

Nicholas-L

Cool man... and so you fixed it yourself :applause: