›

Amp Techs , Jcm800 2203x stopped working then started again , is there an issue?Can anyone advise?

riffpowersriffpowers Frets: 344
edited October 2017 in Amps
I've got a 2203x. 
I was playing it last week , and when I switched it off it made a noise similar to a bomb falling , but electronic sounding, a high pitched whining sound that got lower pitched and then fizzled out as the amp powered off.
Oh dear I thought.
Next time i powered the amp up there was no sound at all.
I took the pedalboard out (it has a tuner and an OD on it ) and plugged straight in.. Still nowt.
Plugged into the low input, the amp now worked.
Plugged into the high input again, this now worked!

So now I'm not sure if I have an issue or not.

Can anybody help me diagnose it??
0reaction image LOL 0reaction image Wow! 0reaction image Wisdom

Comments

  • ICBMICBM Frets: 72311
    Sounds like either the V1 valve or the contact in the low input jack, which disconnects the high gain stage.

    "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." - Walt Kowalski

    "Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein

    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom
  • riffpowersriffpowers Frets: 344
    ICBM said:
    Sounds like either the V1 valve or the contact in the low input jack, which disconnects the high gain stage.
    I did think it had lost a bit of gain but it's hard to tell at low volume 
    0reaction image LOL 0reaction image Wow! 0reaction image Wisdom
Sign In or Register to comment.