John Chi-town Posted November 25, 2012 Share Posted November 25, 2012 Fellow members; A few minuets ago I powered up my system, after preamp went on I set to Aux 1 heard static through amp and immediately shut down. When I powered the system back up and tried a CD no noise yet no sound from right channel. I have a fairly long cable run that runs from amp to sub which has been stepped on a few times by kid and dog, so this is not the first popping experience in the last few weeks. The pops that I have witnessed are very short bursts of static when stepped on or moved, etc. Has happened maybe a half dozen times at most. I am no technical wizard and am wondering how I can diagnose the issue without a professional house call or dragging in 3 plus pieces to a repair shop which will cost big dollars as well. My system profile is outlined below. I am assuming that I should start with fuses? I am fairly certain that the amp and preamp would have but my forte II? Also my amp is not making any strange noise and thermal protection and distortion alert did not come on that I could see. Complete loss of sound on right channel. Could it be the preamp? I am thinking that it is probably either the amp or speaker and hopefully not more than a fuse. I greatly appreciate any assistance that anyone can provide in helping me resolve. Thanks in advance. John Quote Link to comment Share on other sites More sharing options...
ivanhurd Posted November 25, 2012 Share Posted November 25, 2012 First, knock out the obvious. Try hooking your other speaker to the right channel and see if the same thing happens. If not, at least you know it's not the speaker. From there...well...that's out of my expertise, ha ha. Good luck to you, hopefully someone else will chime in with some more ideas. Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 25, 2012 Author Share Posted November 25, 2012 Ivanhurd, Thanks was just getting to that as you made the suggestion. The right channel forte II works when plugged into left, and the left does not work when plugged into right. So the forte II seam to be fine and the problem has to be in the amp and or preamp. My guess is the amp. But I wonder if there is a way to determine for certain? Thanks again! John Quote Link to comment Share on other sites More sharing options...
HDBRbuilder Posted November 25, 2012 Share Posted November 25, 2012 Try some headphones and see if you have both stereo channels. If not, then switch from aux to something else and give it a try....if you don't have two channels then, start checking fuses....if that doesn't solve it then let us know...and we will try more things. -Andy Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 25, 2012 Author Share Posted November 25, 2012 Thanks Andy, unfortunately I do not own a pair of headphones. I did try in CD position and again only the left channel works. I swapped speakers and my dedicated right speaker works fine when connected to the left channel of the preamp. That being said can I say for certainty that the bad fuse or channel is in the amp and not the preamp? When I go through my owners manual there is no fuse description on the Adcom 5802 amp. Is it possible that the amp does not have a fuse for the 2 channels? Attached is a link to the owners manual: http://www.adcom-usa.com/userguides/gfa-5802-ug.pdf Thanks! John Quote Link to comment Share on other sites More sharing options...
ivanhurd Posted November 25, 2012 Share Posted November 25, 2012 Try unplugging everything and plugging it back in including all the RCAs and power chords. I don't suppose you have any friends that have an amp you can borrow to see if it's the amp or the pre-amp? Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 25, 2012 Author Share Posted November 25, 2012 Ivanhurd; Thanks. Yes I unplugged everything and removed the sub from the picture as well. Still no right channel. Think I can come up with an amp to see if the preamp works properly. My gut tells me it is the fuse or channel on the amp though. Thanks again! John Quote Link to comment Share on other sites More sharing options...
Marvel Posted November 25, 2012 Share Posted November 25, 2012 A CD player or mp3/iPod with a volume control could be plugged directly into the amp (please start with the volume ALL the way down). That would let you know if it is the amp. Bruce Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 25, 2012 Author Share Posted November 25, 2012 Bruce; Thanks but I do not see where I would connect my CD player to the amp? My Cd Player does have a volume control. John Quote Link to comment Share on other sites More sharing options...
ivanhurd Posted November 25, 2012 Share Posted November 25, 2012 How about an ipod? You could use a headphone jack to RCA connection, should be the same idea. Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 25, 2012 Author Share Posted November 25, 2012 Ivanhurd; Think I have it figured out. My Adcom GCD 600 CD player has a fixed and variable output. Just need to move interconnects from variable to fixed and put CD interconnects directly to amp bypassing the preamp. Thanks again. John Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 25, 2012 Author Share Posted November 25, 2012 Well it is definitely the amp. Either a blown fuse or blown right channel. I connected the CD player directly to the amp, and only left channel works. In addition only left side of the amps cooling fins are warming up, wheras the right side is cold as ice. Thanks to everyone who added input and guided me through figuring out which piece needed attention. Now I am starting to wonder what the average repair cost is for a blown channel? Thanks! John Quote Link to comment Share on other sites More sharing options...
ivanhurd Posted November 25, 2012 Share Posted November 25, 2012 Good luck with getting it fixed. At least you know what it is now. Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 25, 2012 Author Share Posted November 25, 2012 Thanks again Ivanhurd! Thinking I may want to have them work the left channel as well, even if it tests good. The amp is anywhere from 11-15 years old now and I would hate to have to bring in again in the near future. I am uncertain of exact age since I bought on the used market several years ago. Can anyone comment on whether or not I should have both channels worked on if more than a fuse issue? Thanks! John Quote Link to comment Share on other sites More sharing options...
hornlover60 Posted November 26, 2012 Share Posted November 26, 2012 John Chi-Town, Midwest Audio in the NW burbs repairs equipment. They are located near Algonquin Rd and Golf. I only had one experience with them repairing a Crown preamp. Be prepared for a lengthy wait before repairs are made. Good luck on your repairs, Hornlover60 Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted November 26, 2012 Author Share Posted November 26, 2012 Hornlover60; Thanks. I have used in the past and you are right repairs take forever unless you are willing to pony up extra cash for a quicker diagnosis and repair. They did a good job on an older adcom GTP 500II Preamp / tuner that I owned many moons ago. I am going to check with Sound and Video who were originally in Palatine and are now located in Deer Park, just South of Lake Zurich on Route 12. Here is there website in case you ever need: http://www.soundandvideo.com/store/ Thanks again for your assistance. If they can't help, then it is off to Midwest Audio in Arlington Heights. John Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted November 26, 2012 Share Posted November 26, 2012 Send Snail Mail to: Deltronics 2911 N. Halsted Chicago IL60657 Phone 773.549.6635 Fax 773.549.6230 Deltronics 2003 W. 75th St., WoodridgeIL 60517 630-910-6630 Call for info Email Addresses: info@deltronicschicago.com jon@deltronicschicago.com nikki@deltronicschicago.com Or Send us a Comment or question below A & G Radio & TV 9000S. Cicero Ave.Oak Lawn IL 60453 Tel 708-424-6868 I have use A&G in Oak Lawn and Deltronic's in downtown Chicago for service on my M 70 amps. Not sure of the cost?. One of my Yamaha M 70's amps, I am currently not using if you are interested, 200 watts RMS/channel (excellent condition - refurbished this year). Quote Link to comment Share on other sites More sharing options...
John Chi-town Posted February 24, 2013 Author Share Posted February 24, 2013 Well after 2 1/2 months in the shop it has been determined that my Adcom 5802 needed to be buried, Entire right channel bus blew-up. Parts were obsolete according to Adcom. So I talked with Adcom and they gave me a great deal on a bipolar design 250 WPC @ 8 ohms. A 50+ pound tank named the GFA-565SE. I have less than 4-5 hours of use on, just received. However I like the sound thus far. Thanks to all who provided input. John Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted February 25, 2013 Share Posted February 25, 2013 That Adcom sounds like a real nice amp. I am glad to hear everything worked out. Quote Link to comment Share on other sites More sharing options...
stormin Posted February 26, 2013 Share Posted February 26, 2013 So I talked with Adcom and they gave me a great deal on a bipolar design 250 WPC @ 8 ohms. A 50+ pound tank named the GFA-565SE. Looks like a reincarnated GFA 555MKII. Has 50 more watts in 8ohm stereo and 100 more watts in bridged but everything else inlcuding 4 ohm operation is almost identical. Sorry to hear about your 5802. Quote Link to comment Share on other sites More sharing options...
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