HI I HAVE PROBLEM WITH MY DE 345 THE PROTECT KEEPS FLASHING BUT IT ONLY HAPPENS WITHIN CERTAIN RANGES. lIKE WEHN IM WATCHING TV IT CAN NOT BE WITHIN THE 7-10 SOUND LEVEL RANGE BUT IT CAN BE ABOVE IT OR BELOW IT. THE ONLY PROBLEM IS BELOW 7 REALLY DOES NOTHING BUT PUTTING IT AT LIKE ABOVE 10 CAN MAKE IT HARD TO HAVE CONVERSATIONS WHILE LIKE FOOTBALL IS ON. WHAT CAN I DONT TO FIX SO IT WORKS IN THE 7-10 RANGE
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Im afraid the set is probably in an over current protection mode wherebye it shuts down to protect itself as one aaea of the tv is drawing excess current, the pattern of flashes will have a code which would guide a techie to problem area, im afraid you will need an engineer visit,sorry George
Try a bigger amp. This one wants to be turned down. But seriously the protect can act like sort of a clipping device when the unit is trying to amplify out of a certain range. The transistors may be getting weak and need to be replaced. That said I would move this amp to the midrange or the highs and get a little bigger amp for you low low's. Hope that helps.
the protector comes on to keep the amp from further damaging itself or the speakers. The buzz you heard was probably 60HZ line buzz from the main DC supply conducting full current through one of your speakers through a damaged amplifier transistor. Your stereo will need professional repair. The protect circuit basically opens the speaker relay (and sometimes shuts down the unit) to prevent this DC voltage and current from getting to your speakers until the problem is corrected.
es posible que un canal se ha dañado por lo que primero daño el fusible con la sobrecarga y posteriormente se daño el canal. es necesario se revisen las polarizaciones de los transistores para determinar el canal dañado,es seguro que el daño se encuentra en uno de los frontales.
The protect circuit is doing it's job....probably the amplifier
output stage is shorted.....have a technician check it..make
sure any / all bad connects are soldered when chassis is out
Protet mode is a special diagnostic mode that starts when a fault is detected.
When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.
Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.
Try unplugging power cable for one hour or so. then connect cable back
and see if you get rid of protect state. Sometimes accumulation of
electrostatic charges inside circuit capacitors can kick in protect
mode. In that case unplugging the unit from main for some times can get
rid of electrostatic charges, and reset circuits by draining power
If that was the problem, you will not get Protect when plugging back power cable.
If you do all the above and still get Protect, then there is a real fault.
In that case the unit may be disassembled and tested to find the fault.
If that is the case I suggest contacting the manufacturer at the number
listed on the owners manual, or asking a quote on repair to a local