Announcement

Collapse
No announcement yet.

Amplifier (JVC-SA22) : blows external fuse. Transformer Problem ?

Collapse

Forum Top GA Ad Widget

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Amplifier (JVC-SA22) : blows external fuse. Transformer Problem ?

    Initially after the amp stopped working, I checked the external fuse, which was fine. Then after opening her up I found the two slow blow internal fuses had gone. These I replaced, and now the external fuse keeps blowing whenever I switch the power on. Could both problems be symptomatic of a faulty transformer, and how could I trouble shoot the problem. I love this amp !!

    Thank you ....

  • #2
    amplifier

    you're lucky to have your amp protected internally with fuses. most don't use any.
    check the circuit diagram for fuses in the power supply. if yours is a half wave with a center tap, then one of the diodes are shorted. it may also have a bridge rectifier connected across the two outer leads of the transformer which will give you full rectification of the sine wave.

    Comment


    • #3
      amplifier

      are you sure you have fitted the correct current fuses internally? if you have used higher amperage fuses than before then the external fuse would fail first i would suspect. the problem sounds like a blown output stage, possibly being caused by faulty speaker wiring or even too low impedance speakers being used. i would be very suprised if the mains transformer was at fault.

      regards, peter

      Comment

      Working...
      X
      =