Adcom GFA-545II Stereo Amplifier - No Left Channel Output! GFA545

Поделиться
HTML-код
  • Опубликовано: 29 окт 2024

Комментарии • 32

  • @groovejet33
    @groovejet33 2 года назад +3

    I've said this before, but Norcal has gotta be the most methodical & certainly has the best fault finding technique on the web. Unreal talent

    • @frankpitochelli6786
      @frankpitochelli6786 2 года назад +2

      Agreed, very good troubleshooting skills.

    • @norcal715
      @norcal715  2 года назад +4

      Thank you Frank!

    • @groovejet33
      @groovejet33 2 года назад +2

      @@norcal715 Frank? Frank? Frank? Frank?

    • @jimwenzel5523
      @jimwenzel5523 9 месяцев назад

      What is the amp size of those two blown fuses?

  • @tomhill4003
    @tomhill4003 Год назад +1

    Thanks for the tips on checking transistors. I have a pile of adcom equipment, and this will help me keep it alive.

  • @bblimediamostlyspeakers
    @bblimediamostlyspeakers Год назад +1

    I've got the 1st gen 545 and 555. The larger had two blown fuses just like that. Both work and sound great still. Thanks for showing, looks like relatively easy to test.

  • @chrisburnette8148
    @chrisburnette8148 4 месяца назад

    Thank you so much for taking the time to share this.

  • @barryg41
    @barryg41 2 года назад

    I had a plasma torch blow a fuse. Spent an afternoon checking everything out. Found nothing. Changed big fuse and it's still running four years later. Good work Steve.

  • @g.fortin3228
    @g.fortin3228 Год назад

    those basic checks are a good refresher..thanks !

  • @giorgostexnikos6976
    @giorgostexnikos6976 2 года назад +1

    excellent troubleshooting skills

  • @claudehill2
    @claudehill2 Год назад

    Excellent!

  • @RanTausi
    @RanTausi Год назад

    Great video, i have a mint 545 mk2 and 555 mk2 both are great amps, love them. Who is Uri Cohen ? Thanks for sharing 🙏

  • @frankpitochelli6786
    @frankpitochelli6786 2 года назад +1

    I've had fuses that just fatigued, those were slo-blo fuses and as you know, every power up those fuses wires stretch a bit causing some fatigue.....who know, maybe the company engineer underrated the fuses...
    👍 again.!

  • @davidnguyen5028
    @davidnguyen5028 Год назад +1

    Hi, I’m a subscriber. My class A amp, (adcom gfa5802) just recently developed a slight buzzing hum on the left channel. Do you think the filter capacitors for the left channel are bad? I checked the DC voltage at the speaker terminals and they’re at 0.025V, so I think the coupling capacitors are fine. Or do you think it’s something else? Thanks in advance.

    • @norcal715
      @norcal715  Год назад +2

      It may be one of the main filter capacitors that is failing indeed. Measure the DC voltage and compare it with the same capacitor on the other channel, if one is lover than that may be the one. Also measure the AC voltage with no signal on all of the mail large filter capacitors. If one has more AC voltage across it then that is the culprit.

  • @dalerex9687
    @dalerex9687 Год назад +2

    Where are you located? I have the same Adcom amp with intermittent left channel cut out. I get static sometimes, and sometimes nothing. Sometimes it plays perfect. I would love to get it repaired.

    • @norcal715
      @norcal715  Год назад +1

      In am in Chico, California. email me Norcal715videos@gmail.com

  • @mixinginthebox
    @mixinginthebox 2 года назад

    Thank you..

  • @trevorbartram5473
    @trevorbartram5473 Месяц назад

    I have an original 1986 GFA-535 with the custom Adcom 6800uF 63V aluminum electrolytic capacitors with three (two active) pin terminations. The amp was used for 15 years powered 24/7. Do you know of a replacement cap? If not do you know the cap's active terminals spacing? The caps are not leaking or bulging, should I even consider replacement? Thanks!

    • @norcal715
      @norcal715  28 дней назад

      As long as the unit has been powered up continuously, I would not think you would need to replace the filter caps. Sitting idle is what kills them.

    • @trevorbartram5473
      @trevorbartram5473 28 дней назад

      They were powered 24/7 for 15 years then sat idle for 20 years. If the caps 'look' OK it is better to increase DC voltage slowly across the cap to regrow oxide (?). That's difficult to do without the use of a variac. I have used the amp a couple of times in the last year to 'burn-in' speakers. I searched for replacement caps online from all major parts suppliers but I need to know active pin spacing?

  • @billybrowndog6623
    @billybrowndog6623 2 года назад

    I got a second gfa 7000 thx that the caps leaked I wonder how much to recap all of them I have two of them other one fine but should do that next and I also have a gfa 7500 thx my favorite of them all that I use now all of them are 5 channels anyway just wondering will get them all done when the price is right thanks

  • @harlest71
    @harlest71 2 года назад +1

    Could that have been caused by shorting the speaker wires?

    • @norcal715
      @norcal715  2 года назад +2

      Possibly but if the speaker wires were shorted I would expect much more damage, like shorted output transistors and totally blown (carnage) fuses. I think it was a gentile overdriven condition.

  • @HF-7DXM-6DXW-12
    @HF-7DXM-6DXW-12 2 года назад

    So strange how I can only see one of four comments lol ah the good old audio community

  • @NY411Info
    @NY411Info 2 года назад +1

    Too bad a Chinese company owns Adcom now. Mine was made in New Jersey and was owned by Emerson Electric then. Looks like the build quality isn't bad looking on this unit though. Oh and mine is big brother...GFA-555. Not the 555 II either.

  • @kahlid-ataya
    @kahlid-ataya 2 года назад +1

    how much you will charge the costumer for this repair?

    • @norcal715
      @norcal715  2 года назад +1

      I charged a total of $60 for this repair.

  • @jimwenzel5523
    @jimwenzel5523 9 месяцев назад

    Could you help me . I need To replace the red pilot light on my Adcom 545. What is the voltage running to this lamp?

    • @norcal715
      @norcal715  8 месяцев назад

      It should be a standard 1.9V 20ma LED

  • @karldettling5981
    @karldettling5981 5 месяцев назад

    Someone shorted the speaker cable somewhere!