Adcom GFA-555 II Won't Power On

tbui2007
tbui2007 Posts: 128
edited June 2008 in Troubleshooting
hey guys,, i'm having trouble with my adcom...for some reason it won't power on..i checked all the fuses and everything is allright.i happened a few days ago when i turned it on and saw the flashing distortion alert flash and the power went off..can anyone help me with this problems ...thanks..
LSI15 Front LSIC Center Lsi7 Rears Lsi7 Sides DSW600
Sony S560 Blu-Ray DVD
Sony 46W5100
Monster HTS-3600
Sunfire TGP-401 Pre
Sunfire Grand 200x7
Post edited by tbui2007 on
· Share on FacebookShare on Twitter

Comments

  • danger boy
    danger boy Posts: 15,722
    edited June 2008
    did you open it up and check the internal fuses too? sometimes there may be up to 4 internal fuses.. they can be tough to find inside the case... often well hidden.

    also since you are getting warning lights.. check your speaker wires and swap out the interconnect cables to see if any of those may be bad. bad interconnects are what killed two fuses in my Adcom.
    PolkFest 2012, who's going>?
    Vancouver, Canada Sept 30th, 2012 - Madonna concert :cheesygrin:
    · Share on FacebookShare on Twitter
  • tbui2007
    tbui2007 Posts: 128
    edited June 2008
    danger boy wrote: »
    did you open it up and check the internal fuses too? sometimes there may be up to 4 internal fuses.. they can be tough to find inside the case... often well hidden.

    also since you are getting warning lights.. check your speaker wires and swap out the interconnect cables to see if any of those may be bad. bad interconnects are what killed two fuses in my Adcom.

    i didn't know there are fuses inside the case..i opened it up yesterday but couldn't figure out anything...i will check it out again..thanks.
    LSI15 Front LSIC Center Lsi7 Rears Lsi7 Sides DSW600
    Sony S560 Blu-Ray DVD
    Sony 46W5100
    Monster HTS-3600
    Sunfire TGP-401 Pre
    Sunfire Grand 200x7
    · Share on FacebookShare on Twitter
  • tbui2007
    tbui2007 Posts: 128
    edited June 2008
    how can you locates the inside fuses.. i couln't find any...???
    LSI15 Front LSIC Center Lsi7 Rears Lsi7 Sides DSW600
    Sony S560 Blu-Ray DVD
    Sony 46W5100
    Monster HTS-3600
    Sunfire TGP-401 Pre
    Sunfire Grand 200x7
    · Share on FacebookShare on Twitter
  • Jed Leland
    Jed Leland Posts: 183
    edited June 2008
    Hello,
    Find where the power cord comes into the chassis, then look on the inside and there should be an AC fuse. Of course, you've already unplugged the power cord, right?
    Jed
    · Share on FacebookShare on Twitter
  • ben62670
    ben62670 Posts: 15,969
    edited June 2008
    The 555II has external rail fuses. None inside. There is no soft start resistor on these models. Where are you located?
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
    · Share on FacebookShare on Twitter
  • tbui2007
    tbui2007 Posts: 128
    edited June 2008
    i thought so..i think the ac line fuse is burned but i'm not sure ..how can i tell whether if it's burned...the dc rail line fuse is easy to tell if its burn but i couln't figure out the ac line fuse...anyone has any suggestion???

    oklahoma city....
    ben62670 wrote: »
    The 555II has external rail fuses. None inside. There is no soft start resistor on these models. Where are you located?
    Ben
    LSI15 Front LSIC Center Lsi7 Rears Lsi7 Sides DSW600
    Sony S560 Blu-Ray DVD
    Sony 46W5100
    Monster HTS-3600
    Sunfire TGP-401 Pre
    Sunfire Grand 200x7
    · Share on FacebookShare on Twitter
  • danger boy
    danger boy Posts: 15,722
    edited June 2008
    sorry I thought your Adcom would be like mine and have inside fuses too.
    PolkFest 2012, who's going>?
    Vancouver, Canada Sept 30th, 2012 - Madonna concert :cheesygrin:
    · Share on FacebookShare on Twitter
  • tbui2007
    tbui2007 Posts: 128
    edited June 2008
    danger boy wrote: »
    sorry I thought your Adcom would be like mine and have inside fuses too.

    that's cool man...we learned something new today..
    LSI15 Front LSIC Center Lsi7 Rears Lsi7 Sides DSW600
    Sony S560 Blu-Ray DVD
    Sony 46W5100
    Monster HTS-3600
    Sunfire TGP-401 Pre
    Sunfire Grand 200x7
    · Share on FacebookShare on Twitter
  • Eric W
    Eric W Posts: 556
    edited June 2008
    Give Adcom a call, their tech support department is pretty helpful.

    www.adcom.com
    8541 East Anderson Drive
    Scottsdale, AZ 85255

    Tel: 480.607.2277
    -Eric
    -Polk Audio
    · Share on FacebookShare on Twitter
  • ben62670
    ben62670 Posts: 15,969
    edited June 2008
    To test the fuse you need an ohm meter. The stock fuses were not clear, and a visual inspection will not let you know if they are bad. Take all of the rail fuses out. I think they are about 6amps each, and install one of them in the main fuse holder then try to power up the amp. If it turns on install two 2amp fuse on one side of the amp. If it stays on remove those two fuses, and install them in the other side. This will let you know if one channel is bad. Also the use of the underrated fuses are much less likely to allow damage to the amp. I always use this procedure when I fist fire up an amp after working on it. Those rail fuses at stock amperage will allow damage before they actually blow. I know this for a fact. Shoot me a PM with results, or questions.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
    · Share on FacebookShare on Twitter
  • tbui2007
    tbui2007 Posts: 128
    edited June 2008
    ben62670 wrote: »
    To test the fuse you need an ohm meter. The stock fuses were not clear, and a visual inspection will not let you know if they are bad. Take all of the rail fuses out. I think they are about 6amps each, and install one of them in the main fuse holder then try to power up the amp. If it turns on install two 2amp fuse on one side of the amp. If it stays on remove those two fuses, and install them in the other side. This will let you know if one channel is bad. Also the use of the underrated fuses are much less likely to allow damage to the amp. I always use this procedure when I fist fire up an amp after working on it. Those rail fuses at stock amperage will allow damage before they actually blow. I know this for a fact. Shoot me a PM with results, or questions.
    Ben

    thanks for your advise, Ben...i'll do that when i get home tonight..
    LSI15 Front LSIC Center Lsi7 Rears Lsi7 Sides DSW600
    Sony S560 Blu-Ray DVD
    Sony 46W5100
    Monster HTS-3600
    Sunfire TGP-401 Pre
    Sunfire Grand 200x7
    · Share on FacebookShare on Twitter
  • ViperZ
    ViperZ Posts: 2,046
    edited June 2008
    Standard warning always applies (if not obvious): MAKE SURE THAT THE AMP IS UNPLUGGED WHEN YOU ARE WORKING ON IT.
    Panasonic PT-AE4000U projector for movies
    Carada 106" Precision Series (Classic Cinema White)
    Denon AVR-X3600H pre/pro
    Outlaw 770 7-channel amplifier
    B&W CDM1-SE fronts
    B&W CDM-CNT center
    B&W CDM1 rears on MoPADs
    JBL SP8CII in-ceiling height speakers
    Samsung DTB-H260F OTA HDTV tuner
    DUAL NHT SubTwo subwoofers
    Oppo BDP-93 Blu-Ray player
    Belkin PF60 Power Center
    Harmony 1100 RF remote with RF extender
    Sony XBR-X950G 55" 4K HDR Smart TV + PS3 in the living room
    · Share on FacebookShare on Twitter