Lazy J40 brand new but no sound

What's Hot
2

Comments

  • crunchmancrunchman Frets: 3352
    I've got a really early J20 that I probably got sometime around 2007.  Only problem in all that time was the contacts on the input jack socket needed cleaning.
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • cbellangacbellanga Frets: 350
    crunchman said:
    I've got a really early J20 that I probably got sometime around 2007.  Only problem in all that time was the contacts on the input jack socket needed cleaning.
    exactly the same for me .. solved in a sec with WD40
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • GadgetGadget Frets: 521
    cbellanga said:
    crunchman said:
    I've got a really early J20 that I probably got sometime around 2007.  Only problem in all that time was the contacts on the input jack socket needed cleaning.
    exactly the same for me .. solved in a sec with WD40
    WD40? Is that good to use on jack sockets?
    I think, therefore.... I... ummmm........
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • cbellangacbellanga Frets: 350
    Gadget said:
    cbellanga said:
    crunchman said:
    I've got a really early J20 that I probably got sometime around 2007.  Only problem in all that time was the contacts on the input jack socket needed cleaning.
    exactly the same for me .. solved in a sec with WD40
    WD40? Is that good to use on jack sockets?
    worked perfectly for me (cleaned the residue with a cloth after)
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • robinbowesrobinbowes Frets: 1689
    Gadget said:

    WD40? Is that good to use on jack sockets?
    Not really, no. You're better using proper contact cleaner - WD40 leaves a bit of a sticky mess, which attracts more dirt, which means the problem comes back sooner.

    R.
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • lukedlblukedlb Frets: 165
    Part 2 postponed until Saturday. 
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • ICBMICBM Frets: 30905
    Gadget said:

    WD40? Is that good to use on jack sockets?
    Not really, no. You're better using proper contact cleaner - WD40 leaves a bit of a sticky mess, which attracts more dirt, which means the problem comes back sooner.
    I use WD-40 on pots, but only as a second attempt solution if proper contact cleaner has been tried at least twice and failed - because then it's a shot to nothing, since you'll have to change the pot anyway otherwise. It very often does work, and as far as I've seen it doesn't tend to leave enough of a residue to attract further dirt, as long as it's in a closed amp chassis.

    And *don't* ever use it on rotary encoders such as the ones Line 6 use on the Variax guitars - firstly it won't do anything useful, and secondly I have it on extremely good authority from @impmann that it will attack some of the plastic parts inside and wreck the component.
    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone."
    0reaction image LOL 0reaction image Wow! 1reaction image Wisdom · Share on Facebook Share on Twitter
  • GadgetGadget Frets: 521
    I keep meaning to buy some Caig Deoxit, which I've been told is ideal for such things. Expensive though.
    I think, therefore.... I... ummmm........
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • PhiltrePhiltre Frets: 678
    edited January 11
    Gadget said:
    I keep meaning to buy some Caig Deoxit, which I've been told is ideal for such things. Expensive though.
    But bloody magic stuff. I got a can earlier this year and it's fixed a dodgy power connection on a mixer, some switches and pots in a Chapman Stick, and pretty much paid for itself.
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • GadgetGadget Frets: 521
    Philtre said:
    Gadget said:
    I keep meaning to buy some Caig Deoxit, which I've been told is ideal for such things. Expensive though.
    But bloody magic stuff. I got a can earlier this year and it's fixed a dodgy power connection on a mixer, some switches and pots in a Chapman Stick, and pretty much paid for itself.
    Good to know. Thanks.
    I think, therefore.... I... ummmm........
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • hotpickupshotpickups Frets: 831
    Had my J20 since 2012 and it’s performed flawlessly for a bit of balance...
    Mine too. I hope I'm not tempting fate but I have had mine for around that time too :)
    Link to my trading feedback:  http://www.thefretboard.co.uk/discussion/59452/
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • DJH83004DJH83004 Frets: 164
    Had my J20 since 2012 and it’s performed flawlessly for a bit of balance...
    Mine too. I hope I'm not tempting fate but I have had mine for around that time too :)
    Please don’t think I was being negative about the build quality of the J20 I worked on in my last post, not at all, but the separate modules would be particularly susceptible to damage if banged around in transit (particularly long distance) simply because so much discrete circuitry is packed into them, and especially if they were left screwed onto the inside of the cab rather than packed separately.
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • ICBMICBM Frets: 30905
    The bottom line is that couriers can break anything almost irrespective of build quality.

    You should see the 70s Fender Bassman 100 I recently assessed after being imported from the US...
    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone."
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • BazPBazP Frets: 274
    I sold a synth module to Australia once - shipped out in perfect condition and very solidly packed. When it got to the other end, it looked like someone had dropped something weighing several tonnes on it - a perfect, clean 3" triangular cut out from the middle of the front edge all the way through the chassis and internals - thankfully it was insured and amazingly it was repairable
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • ICBMICBM Frets: 30905
    edited January 12
    I recently shipped a Mesa rackmount preamp to the Netherlands, well packed - but when it arrived it had clearly been opened, the unit taken apart, one preamp valve taken out deliberately and left loose inside (they cannot fall out of the holders even if the box was dropped, they're very tight and actually difficult to remove on purpose), reassembled, then repacked very badly and sent on to the recipient.

    This is not the first time I've seen this either - a friend of mine bought an amp from France, and when it arrived all the valves were smashed and there was glass from them inside the closed space between the speaker and the grille cloth where it could not possibly have got with the speaker in place.

    The Fender Bassman I mentioned had been dropped from enough of a height that the power transformer had bent the floor of the chassis down by about 3/4", pulled the end rail up by about 1/4", and it had popped one of the OT bolts out of the chassis entirely.

    This is why I do not ship amps, as a rule... I thought a rack preamp would at least be fairly immune, but I was wrong there too.
    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone."
    0reaction image LOL 1reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • JohnPerryJohnPerry Frets: 1261
    lukedlb said:
    Part 2 postponed until Saturday. 



    What time?

    FFS this is agony. Like waiting for the next Game of Thrones. 

    What's wrong with this damn thing? Why is there no sound? And who's to blame? Can a drummer safely operate an amp? So many unanswered questions 

    1reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • PhiltrePhiltre Frets: 678
    Tune in to next week's episode of "Why the fuck is a drummer using an amp?"
    4reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • lukedlblukedlb Frets: 165
    Update: Jesse spent a good couple of hours talking my mate through testing every single component on the amp, explaining what every part does and how to measure, basically every amateur amp builder's dream of amp instruction. Nothing. Everything reads correctly, even the rectifier substitution did nothing to rectify (sorry) the situation.
    At a loss to explain what was the defect, Jesse suggested trying the old battery to the speaker trick. For a brief moment there was sound and then nothing. It looks like a defective speaker. Jesse is sending a replacement in the post.
    My mate is thoroughly impressed by Jesse, the work gone into the amp, and his availability to fix the amp on the other side of the world.

    A Lazy Jesse he ain't.

    Tune in for the next installment when a Drummer mounts a speaker.
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • BazPBazP Frets: 274
    So does that mean the amp has been running against an open circuit then? :-/
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • lukedlblukedlb Frets: 165
    BazP said:
    So does that mean the amp has been running against an open circuit then? :-/
    I hope not. I mean, the electric signal is going somewhere but isn't being dissipated by speaker movement.
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • ICBMICBM Frets: 30905
    edited January 15
    lukedlb said:

    At a loss to explain what was the defect, Jesse suggested trying the old battery to the speaker trick. For a brief moment there was sound and then nothing. It looks like a defective speaker. Jesse is sending a replacement in the post.
    More likely it's not 'defective' but the amp has been dropped heavily in shipping, the magnet has shifted or bent the frame slightly, and either trapped the voice coil in the magnet gap or broken one of the wires. This is fairly common, the magnet is heavy enough that its own inertia can do that almost no matter how well-packed the amp is.

    On the other hand if it's a UK-made Celestion it *could* be a manufacturing fault - I have come across that too, on one. (But never on a Chinese one...!)

    The good news is that shipping a speaker separately in its box is actually less risky for it, since the frame isn't bolted to anything solid and so the magnet doesn't stress it if it gets dropped.

    BazP said:
    So does that mean the amp has been running against an open circuit then? :-/
    Maybe, but it isn't an issue with a good-quality transformer unless the amp was really cranked, and even then they will usually survive.
    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone."
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • RiftAmpsRiftAmps Frets: 1125
    BazP said:
    So does that mean the amp has been running against an open circuit then? :-/
    We don’t know that.

    It could be that the spider has come unglued and the voice coil lifted out of the magnet - quite common shipping damage. There could still be a full load on the amp.

    In fact even if there wasn’t a speaker load, the resistance of the OT windings themselves still acts as a load (albeit very small) which in a properly designed TX is enough to let the amp idle for a good few hours. The Mojo TXs in Lazy Js are built by Heyboer, so are well engineered and proving the user didn’t run the amp at full crank for ages with a signal, they will be fine.
    Rift Amplification
    Handwired Guitar Amplifiers
    Brackley, Northamptonshire
    www.riftamps.co.uk
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • BazPBazP Frets: 274
    edited January 15
    Thanks gents,

    So the OT should survive regardless

    If the OP's drummer takes a resistance reading across the speaker at the jack, that'd say for sure if there was a load?
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • martinwmartinw Frets: 1800
    lukedlb said:

    At a loss to explain what was the defect, Jesse suggested trying the old battery to the speaker trick. For a brief moment there was sound and then nothing.

    That's right though isn't it? With DC the speaker will make a short noise while the cone moves, then stay silent with the cone in the new position.

    Or do you mean that the speaker did that once then stopped?

    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • lukedlblukedlb Frets: 165
    martinw said:
    lukedlb said:

    At a loss to explain what was the defect, Jesse suggested trying the old battery to the speaker trick. For a brief moment there was sound and then nothing.

    That's right though isn't it? With DC the speaker will make a short noise while the cone moves, then stay silent with the cone in the new position.

    Or do you mean that the speaker did that once then stopped?

    once then stopped. they tried it again and whatever shifted before was well and truly stuck.
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • martinwmartinw Frets: 1800
    lukedlb said:
    martinw said:
    lukedlb said:

    At a loss to explain what was the defect, Jesse suggested trying the old battery to the speaker trick. For a brief moment there was sound and then nothing.

    That's right though isn't it? With DC the speaker will make a short noise while the cone moves, then stay silent with the cone in the new position.

    Or do you mean that the speaker did that once then stopped?

    once then stopped. they tried it again and whatever shifted before was well and truly stuck.


    Ah ok. :(


    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • lukedlblukedlb Frets: 165
    It is a Fane A60. 
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • BazPBazP Frets: 274
    edited January 15
    I'd be tempted to wire the speaker to another sound source to be 100% 

    Or borrow another cabinet to attach to the amp

    Failing that, he might be able to get an A60 more locally in Oz - they are sold under the brand name 'Fane' - only difference being the upwards inflection on the 'e' rather than a more guttural, Sean Bean-like Yorkshire word ending in a soft 'n' :-)
    1reaction image LOL 0reaction image Wow! 1reaction image Wisdom · Share on Facebook Share on Twitter
  • lukedlblukedlb Frets: 165
    The new Fane arrived despatched and paid for by Jesse. Half way across the world. You can't ask for better customer support. My mate installed the replacement speaker, rehoused the reverb unit and.....
    It works gloriously.
    On all accounts a very satisfying result and a demonstration that you were all right about Jesse's fantastic customer support.
    0reaction image LOL 2reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
  • BazPBazP Frets: 274
    edited February 1
    Glad your mate got a good result.

    Does the speake cone move on the opposite direction in Oz? ;-)
    4reaction image LOL 0reaction image Wow! 0reaction image Wisdom · Share on Facebook Share on Twitter
Sign In or Register to comment.