Question about Sony STR-DE545 Receiver
When turned on, goes straight into 'protect' mode, i have been searching online on ways to fix this problem.
i have come to the conclusion that the most likely cause of the problem is the internal ground points, because most people on other forums have complained about this problem and thats been the best responce for it.
seeing as i know little about the circuit boards and not much of a tech person im not sure where to find the ground points to attempt to fix the solder job if needed. a diargram or very clear instructions on where to find these points would be very much appriciated. thanks, Ryan
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Posted on Jan 02, 2017
I had the same problem with STR-DE545; I worked out over time the main board starts to sag, which in turn causes the exposed solder points to earth out on the bottom of the case. Reseating the mainboard along with using non-conductive foam to hold it up, fixed the grounding issue. Hope this helps anyone else with the same issue. :)
Posted on Jul 25, 2008
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
SOURCE: Sony STR-D715 Protect Mode
This is a common problem...
It is in fact a bad power-amp module.
I have repaired quite a few of these receivers by replacing it.
The module is inexpensive. I Googled the Part number and found several sources for it.
Posted on Oct 10, 2009
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