TX DS838 WHEN TURNINGVOLUME DOWN UNIT MAKES A POP SOUND
AFTER DOWNING A REPAIR ON THE SUROUND OUTPUT AMPS UNIT CAME UP WITH A NEW PROBLEM WHEN TURNING VOLUME DOWN AND COMING TO MIN VOLUME UNIT MAKES A POP SOUND AND GOES TO PROTECTION FOR APROX 3 SECONDS THEN COMES BACK TO NORMAL ,IT ONLY DOES IT ON SUROUND SOUND A/B FRONT IS FINE.
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Re: TX DS838 WHEN TURNINGVOLUME DOWN UNIT MAKES A POP...
Sight unseen my money says the new problem is a direct result of the 'repair' to the channels that are giving you problems now. You didn't elaborate on what it was you were trying to fix in the first place. Backtrack your steps and undo what you can to see if the bug changes.
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Get a RCA cable and connect from your amp where it said Sub Woofer in the Pre Out box in the back of the amplifier top left hand side and take it to the "Sub In" located in the back of your Sub woofer bottom right hand (White round connector).
yes , Im afraid you have a chip gone , If you open the unit up you'll see a alloy heatsink with 4 to 8 large chips screwed to it , These are the amp drivers , In between these chips you see a smaller one (that is the protect chip),You see when things get a little hot this chip is designed to break sooner that the more expensive main amp chips , In the past ive unsoldered these and still found the amp driver bust too ,dont worry though , maplins or even farnell(cpc) on the web will supply these for less than a tenner..If you wanna test my fix then just unsolder the littlest chip on the main heatsink and it should start to work again but with NO protection(unplug it first before taking it to bits)
The problem here is that the output amplifier section has a problem. This is detected internally and the system shuts down in a "protect" mode. The output section really only kicks in when you attempt to bring up the volume. Another possibility is a problem in the "front end" where DC current is being passed to the amp section. Without takeing measurements, it is difficult to determine the exact cause. This should be a relatively stright-forward repair for a service shop and should cost about $20-$40 in parts plus the local labor charge.
So your saying that you have no rear channel. Some recivers use a single stereo output ic for both sides on the rear speakers. you could have a defect with this IC . Anther thing Im sure you check3ed the obvious ie : the switch is on suround sound? If there is a front to rear fader is it in the middle? Good Luck