Recent content by rschweitzer

Often times engineering updates and changes are made and the schematic gets missed or purposely doesn't get updated. I am assuming the selenium rectifier has 4 connections, AC in and DC out. You can change it to a silicone bridge. Keep in mind that you will need a dropping resistor due to...

If the outputs were shorted, they took the other components I mentioned. On the right channel, that would be: Q2, Q4, Q12, Q14, R10, R12, some bias resistors and a few capacitors. Also, if someone else was in there prior to you, they may have put some parts in that were incorrect or in the...

Are you using a DBT? If the output transistors went bad, those are no longer available and new stock is typically Chinese knock offs that will fail. What did you replace them with? I thought there was a TO-3P replacement/mod that would work? I know there is for the KR-8050 which I also...

Yes. I have a 7050. 1979 seems to be the last year for silver faced receivers, this being one of them. It was in pristine condition when I got it. Had a nice scent to it and came from a wonderful home. I restored it. Fixed a few issues in the power supply, added a triac and fabricated a...

I spent countless hours on the phone with Onkyo support and they offered no help whatsoever. They insisted it was not an issue. I told them the menu to sync audio does nothing going negative. I asked the tech to try it. He couldn't as they weren't set up for that. We ended up at a stalemate...

I don't recall responding to this particular thread. I do recall measuring some voltages on my working unit since it was on my bench at the time and the schematic was difficult to read. What is occurring with your 7050? I assume dim bulb glows brightly? Edit: I missed going back to see...

If you ever get more receiver/amps on your bench, buy the triac/resistors/capacitors parts that we discussed on the Facebook thread along with the mini circuit board. Also get some extra black, red and white wire since the board normally is not right next the switch. Do away with the snubber...

Did you say 8010? This one came from a bar in Huntington Beach ⛱️, California and it looked and sounded like the beach to! The audio was gritty and lifeless. It was pretty much like mud and so disappointing. But.....with help of Mothers and Mequirers automotive products, it became visually...

You mean one of these? Yeah....I agree. I also have the 8050 and was considering the 9050. This 7050 sounded pretty decent when I got it from a person in Texas. But, I made it better than factory new. It went through a complete update and restoration. The power supply section had some...

Yep! They are substitutes. Perfect match actually. Don't forget the Omron relay. And....there are some threads here on AK about adding a triac to the power switch. Check those out if you already have not. I add a triac to every amp/receiver on my bench and remove the snubber capacitor. I...

I have one of these, my sleeper, as I call it. If memory serves me, I couldn't adjust the bias to a low enough level and ended up replacing the diferential drivers, Qe1 & Qe3 and Qe5 & Qe7. KSA992 Transistors, PNP and KSC2690 Transistors, NPN. Also replaced the trimmers to Bornes multi-turn...

Based on the pictures and what you and others have written, it appears that there is an over current draw and these resistors held up as best they could. I would replace them with 3 watts. I had a similar situation with KR-7050 power supply where the resistors got so hot they burned the...

Then the 9050 is obviously different for those indicators. The 7050 and 8050 have what is pictured for indicators. That board has to be removed with the faceplate off. I choose LEDs and removed the lights, rubber spacers and pins.

Replaced the bulbs in the 7050 and 8050. I think the 9050 is identical. Cool white LED wedge bulbs soldered to existing wires. for the dial face. 7050 pictured. Indicators are water clear LEDs with a series dropping resistor and diode. To do this, I removed the miniature light, unsoldered...

I own both of these receivers and in both I installed a triac So, the current draw at the switch doesn't matter. The triac handles that. Either switch should work as I think they are the same size.