Re: Pioneer VSX-1022-K won't turn on

idle current is way out of spec on the channel with the new transistors... test pt's should be steady at 2.0+-0.2 mV. I'm getting 100-130mV with some oscillation on the affected channel, but the rest of them are close. This was off by so much I did not bother to turn the POT. Time to start checking some more parts. I have not yet removed the entire heat sink, think its better to remove all power transistor screws, or bend all the transistors for access to the underside of the board?

Re: Pioneer VSX-1022-K won't turn on

Well... I hooked it up to some old school fisher 8 ohm speakers i have... hooked up on the B speaker system. It works until I turn the volume up too loud then it turns off. Sound Quality is good. I tried to check for another code, but for some reason, now I cannot enter or clear diagnostics... bizarre. The 2 key combinations don't work anymore when the unit is either on or off. If I leave it at a comfortable room level, it will play just fine. Guess I have some more work to do. Although, I did not use a perfect line level input. I just used...

Re: Pioneer VSX-1022-K won't turn on

Still have not received the ebay ones, but after your post I looked up the seller and indeed a few people in other forums had him listed as selling some counterfeit parts. Not worth taking a chance on making the problem worse...
I had never heard of sanken transistors before and was almost positive digikey would not have them, but I was wrong!

Have heard stories of people getting a package with an empty die or worse yet, dead short... I ordered from digikey as well and they came in 2 days. I changed them out and no more...

Re: Pioneer VSX-1022-K won't turn on

yep! sure enough, it was a bad D2390/B1560 pair on the final amp assembly. dead short at collector to emitter on both of them. The resistors look ok, but I will unsolder and test them as well. Good news for others with this problem--you can get these transistors for cheap on ebay.
I have not fired up the soldering iron yet, but will later this week. Hopefully this is the only problem with this unit.

Re: Pioneer VSX-1022-K won't turn on

Update- if I can enter service mode and quickly press enter enough times after receiving "DC: 000", I eventually find an overload condition "OVER: 007" which keeps incrementing as I turn the unit on and off... but, the unit always turns off no matter what mode I enter.

Re: Pioneer VSX-1022-K won't turn on

wow, what an interesting thread! I just randomly picked up a vsx-1022 at a garage sale with a similar issue. Although, mine gets the first relay click then shuts off in 5 secs maybe.

I can do both tests mentioned.
standby+alc: reports "clear?", after i press enter it says "OK" then powers off
standby+preset left: reports "DC: 000" then powers off

I just downloaded the service manual and am about to dive in...

and btw, I have hit this forum several times...