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Sony str-da90es in protect mode


Hi I bought this receiver used, previous owner said it shows protect mode only. Any suggestions? Thanks

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When these units go into protect mode, they normally have a blown channel. It is not an easy fix, it will require the replacement of a few parts. You would need a multimeter and soldering equipment to determain which parts need to be replaced.

If you would like to fix it yourself let me know and I can help you with it, but it would not be an easy job for you unless you have some experience at troubleshooting electronics.


Posted on Nov 01, 2008

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How do I adjust the treble and bass on sony str-dh520?


See EQ Mode on page 59 of the owners manual to set the bass and treble for the front speakers, presumably for 2 channel mode. For multi-channel mode there are several pre-programmed audio modes listed starting on page 43 and music mode starting on page 44.
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Hi. my sony STR-DE 597 go in protect mode. how can I fix/repair this? Give me a tips.


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Hi i am a new member and i have a problem with my str-k840p it started to have a protect mode flashing and I can't hear the at all the tv or speakers. What could i do i check all my connection and they...


Hi,
Protect display indicates that receiver is in protection mode due to some serious problem in output amplifier section and most probably any output channel output chips got shorted out.
Protection mode turns On to avoid any further damage in receiver. If your Sony STR-K840P is under warranty then call numbers written on warranty documents to ask warranty cover and if unit is out of warranty then either Sony service center or local repair shop will help you to get it fixed, it is not user level repair.
Hope these info will help you.
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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.

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Sony STR-D611 receiver goes into protect mode when turned on.


I cleaned the contacts on the transistors and it's working great now. Previously, I spilled some drink on the unit and it went into protect mode and it was in the power amp section. It's all up and running again. Thanks for the info. --Steve B.

Dec 06, 2008 | Audio Players & Recorders

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Sony STR-D665


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.

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Sony STR DB-930 Receiver jumping into protector mode


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.

Regards

Darryl.

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Sony STR-DE435 Receiver


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.

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