20 Most Recent Sony STR-DE845 Receiver Questions & Answers

First of all my STR-DE845 started having the protector problem about 6 months ago and I bought this receiver back in 2001. This is what I found wrong with mine. After searching online I found a service manual for the receiver, this came in handy when diagnosing the problem. The first obvious thing was discoloration of the board around the IC 501, 601, and 701 Op-amps. When looking at the receiver from the front these are the three vertical NEC ICs to the right of the main amplifiers. Even with no load these amps get very warm. Sony failed to add any heat sink to these ICs so eventually they can de-solder themselves, specifically the 701 IC which is the one closest to the back of the unit. With mine I was able to slightly push the 701 more vertical, since it was leaning, and I believe it has helped it make a better contact. The protector circuit will kick in if it senses the Op-amps are shorted or not making contact. The best solution is to add some copper heat sink to these ICs, they already have screw slots for a heat sink. If they ever fail you will have to get new op-amps and re-solder them to the board. Hope this helps.

what problem are you having?

i bent the leads slightly so the 2 boards seated in more tightly together...the male plug leads. good luck.

test analog input with another receiver ,if it comes out same low , good quality sound level ,then issue/problem is on input source not on receiver. Sometimes the way source audio was recorded causes these issue on high quality receivers...

how do you have it connected?

First I would try to reset it. With it off, hold the power button for about 5-10 seconds. It should either reset, or tell you to press enter to reset it.

i have the same ******* problem

Check for bad solder connections and tighten any and all screws that hold the circuit boards to the chassis.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Sony-STR-DE845-Receivers-manual/id/387ci973/t/2/