These kinds of receivers were the real dreadnoughts of that era, I just couldn’t afford one at the time. These, with 70s (now) classic rock, vinyl albums and FM stereo radio, all made it a match made in heaven …
Aha...after 35 years I learned what was the issue with our humming str-7065 was! My brother and I dug all the components out and tested. Blew a few transistors while testing. Eventually we gave up and the amplifier fixed itself. Thanks for posting this video.
I just got one of these that needs work. I’m trying to just check the simple things first and I have no real experience so I’m not doing much. I cleaned the pots and switches and I’ll be seeing what difference that makes here in a bit. I was wondering if the bottom panel removes easily without anything important falling off or apart because I don’t see any other way to check/remove the fuses.
Awesome video. When you were trying to poke that lead through from the top side of the board I was thinking maybe a precision drill bit like one used for carburetor jets would work to get the lead through first and then flow solder through the hole? Just an idea.
Yes. I hate wire wraps for this reason. You basically have to look around on the set for other signs of corrosion. Sometimes you can tap on the wire wraps with an insulated rod and get results.
Jordan, I just started watching your last couple of videos. Once you were able to get the 38khz carrier back I don't understand what you meant by no stereo separation. On your scope are you monitoring the left and right channels? Sorry for being an idiot but I don't understand stereo separation. Thanks for Reviewing! John
Yes, monitoring left and right. My signal generator can make the phasing such that if everything is working correctly I should have one left or one right channel (depending on which I'm setting the generator output to) if I see both channs on the scope during this test there is no separation and the multiplex is not demodulating properly
Jordan; How should the ground terminals on these older recievers and integrated amps be used and where should a wire from these terminals be connected? Would properly utilizing these grounding connections reduce hum? Thanks in advance!
Ground on the receiver should really only be used to unify the chassis of something like a turntable Grounding the receiver to earth creates a return path which could lead to shock if all pieces associated with the stereo are not earth grounded as well.
Definitely not to the standards the original one is. Company bought independence electronics. Shango said his had issues out the gate. I have two, and old one and a new one The new one has been repaired a couple times. The old one is still chugging along
Very nice vid I have one coming to me that has lost a channel, personally I know nothing about electronics but strangely I understood everything so far. If DeoxIT can't fix it then find a video that can. Thank you.
I'm not surprised about the internal sockets, it's a crappy design. Also the outside sockets go grey and becomes isolated from the phono outer. The bulb made made me laugh, what an odd way to change to stereo or mono. Sony always liked doing things different.
I would wonder if that slight separation of signal went all the way back to manufacturing. Unit could of slipped through Q/C. Elsewise interesting session. Thanks for the look.
Another great video. Trouble shooting is the puzzel and solving it is what makes it fun.
And not being able to solve the problem makes it dreadful!
These kinds of receivers were the real dreadnoughts of that era, I just couldn’t afford one at the time.
These, with 70s (now) classic rock, vinyl albums and FM stereo radio, all made it a match made in heaven …
Aha...after 35 years I learned what was the issue with our humming str-7065 was! My brother and I dug all the components out and tested. Blew a few transistors while testing. Eventually we gave up and the amplifier fixed itself. Thanks for posting this video.
Divide & conquer and don't give up. That's the only way for these old girls.
Good job on this Sony Jordan
I just got one of these that needs work. I’m trying to just check the simple things first and I have no real experience so I’m not doing much. I cleaned the pots and switches and I’ll be seeing what difference that makes here in a bit. I was wondering if the bottom panel removes easily without anything important falling off or apart because I don’t see any other way to check/remove the fuses.
That "stereo lamp" burnt means no stereo detection is mind blowing.
Any other ICs other then that Sony part have this twisted design ?
Wow! I’d NEVER had figured that one out! You are “the man”! Love your vids:)
Awesome video. When you were trying to poke that lead through from the top side of the board I was thinking maybe a precision drill bit like one used for carburetor jets would work to get the lead through first and then flow solder through the hole? Just an idea.
I hope you include the "detailing" (making it "pretty")
Good fix with the oxidised RCA grounds. Have you ever had issues with the wire wrap signal connections oxidising?
Yes. I hate wire wraps for this reason. You basically have to look around on the set for other signs of corrosion. Sometimes you can tap on the wire wraps with an insulated rod and get results.
Jordan, I just started watching your last couple of videos. Once you were able to get the 38khz carrier back I don't understand what you meant by no stereo separation. On your scope are you monitoring the left and right channels? Sorry for being an idiot but I don't understand stereo separation. Thanks for Reviewing! John
Yes, monitoring left and right. My signal generator can make the phasing such that if everything is working correctly I should have one left or one right channel (depending on which I'm setting the generator output to) if I see both channs on the scope during this test there is no separation and the multiplex is not demodulating properly
Jordan; How should the ground terminals on these older recievers and integrated amps be used and where should a wire from these terminals be connected? Would properly utilizing these grounding connections reduce hum? Thanks in advance!
Ground on the receiver should really only be used to unify the chassis of something like a turntable Grounding the receiver to earth creates a return path which could lead to shock if all pieces associated with the stereo are not earth grounded as well.
@@JordanPier Thanks Jordan!
Nice tip on soldering the rca grounds JP. I'm a big fan of Sony stuff from this era. Regards from Ireland mate.
Какой фирмы выходные транзисторы? У этого старичуа
Did you say the new Capacitor Wizard is junk?
Definitely not to the standards the original one is. Company bought independence electronics. Shango said his had issues out the gate. I have two, and old one and a new one
The new one has been repaired a couple times. The old one is still chugging along
Most enjoyable - From this I hope people appreciate the effort required to get aged equipment back to functioning and dialled in like new.
Could you tell me how I can be a customer of yours ?
43:25 I like to call it "Zero’th order recycling."
Long live vintage electronics.
One thing I Dont Use Are Scopes
Cause I Never Thought They Wh'er Needed.
Hi Jordan
Been following you for years
I just sent a Kenwood KA 7200 to you
Hope you can do a video
Might be able to. Just depends on available time
Dont drop any solder on that dial cord, like I done before, while installing that bulb............lol
Very nice vid I have one coming to me that has lost a channel, personally I know nothing about electronics but strangely I understood everything so far. If DeoxIT can't fix it then find a video that can. Thank you.
To Do Close Quarter Soldering
You Need A Pencycle Iron With A Pointed Tip On It.
Always enjoyable.
I'm not surprised about the internal sockets, it's a crappy design.
Also the outside sockets go grey and becomes isolated from the phono outer.
The bulb made made me laugh, what an odd way to change to stereo or mono.
Sony always liked doing things different.
I would wonder if that slight separation of signal went all the way back to manufacturing. Unit could of slipped through Q/C. Elsewise interesting session. Thanks for the look.