Ive had this amplifier for roughly 20 years, and its never failed me. recently the audio stopped working. none of the fuses are blown and the front display works, im thinking transisitor problems. where can i go, or who can i go to to get it repaired. i live in upstate new york (bath), near corning, rochester binghamton area,please let me know
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Ok there is a few steps to check in this case.
1. Make sure the positive cable is secured proply on the battery termnial also while you are there as well check to make sure the fuse on the positive cable isn't blown.
2.Make sure your ground cable is secured proply down on the frame of the car or if you are runing a negitive cable back to the battery(the same apply,s as step 1 - less the fuse).
3.Check to make sure the remote turn on cable is not lose on the amp connection.
The most common cause of this is a failure of the output transistors. These amps are not the easiest for access during repair. I would not suggest you attempt this repair if you have no experience working on these. The output transistors and some additional parts in the same circuit are likely to require replacement. Figure on about $50-$70 for parts. Add in the local labor rate for the total repair cost.
This is a good unit and is worth the repair cost. You will get many additional years of performance out of it once repaired.
Quick check... If the amp still stays in safety mode with the vol turned down and the speakers disconnected, it will have failed in some way. Since you have the safety operation light ON, you can expect that the power transformer is OK. I would expect that you have a DC offset condition on one channel. The most common problems you may have are
dry solder joints about the power stages such as regulators, and output/driver transistors/IC's.
blown output transistors/output IC with possible fusible resistor failures, and or sometimes burnt up printed circuit tracks.
a voltage rail failure from a burnt fusible or power supply component.
If you are up with electronic fault finding, soldering and have the tools, have a go yourself, I could talk you through it. If not, I would suggest you contact you local HiFi specialist and find who can repair it or at least check to see what has failed for you. Good Luck. If you cannot find someone, hit me back and I will try to find someone for you. Cheers
Disconnect the unit from the mains at the wall socket. Leave powered down for 5 mins to ensure a good reset and turn unit on again and see what happens. If there is still no life. Check for failed fuses inside amp. ALWAYS RELACE FUSES WITH THE SAME RATING AND TYPE.