Question about Sony STR-DE597 Receiver
The protection mode is there for a reason...the main one being to protect your speakers in the event that there is an issue with the amplifier. Bypassing the protection can easily result in the destruction of your speakers and the unit itself. Your receiver needs to be examined by a real live technician.
Posted on Nov 27, 2009
SOURCE: stuck in protect mode
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 completely.
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 technician.
Posted on May 29, 2009
I went through the amp/receiver and used small star washers on all the grounding screws I could find including the one securing the transformer, cleaned dust off all circuit boards, checked output transistors and fuses, all OK.
Re Assembled unit and it worked OK.
I will buy a fan and fan it to avoid sourcing heatsinks for the previusly suggested IC's.
Thanks for the technical help, sure solved my problem.
Posted on Mar 13, 2008
Hi, I had this very problem with my Sony 5.1 home theatre amp - after a few seconds it would go into 'protect' mode and would not play sounds. Having checked all the usual causes such as wires/ shorts etc I took the outer case off revealing the 'workings' and just tightened up every cross head screw I could find. Since then it has been perfect. Might be that I had a bad earth???
Posted on Jun 12, 2007
If you need support you can log into:
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Posted on Jun 02, 2008
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