I'm a total novice when it comes to electronics repair but thanks to your video I was able to identify the problem (purchased a multimeter and test revealed bad power switch) and bring my Pioneer SG-9 back to life !!
Beautiful Equalizer and very professional video on how to repair step by step👌 Could you kindly share how you find substitute transistors? And what values should be considered most important and less important. Any of your favourite website to buy transistors from? Much appreciated👍
Thank you for your comments. Generally, I suggest to find the datasheet for the original transistor which you want to replace first. And then find equivalent transistors by searching in the website. Basically, you want to try to match the transistor's Vcb, Vce, Veb, Ic and Pc as close as possible (can go above but not under). Also it may be critical in some situations that current gain (hFE) needs to be in certain value that enable to make amplifier work properly. Try to use low noise and audio-frequency grade type of transistors. The reliable vendors I recommend are Mousers, Digi-Key, Jameco........etc.
@@VintageAudioFan Thanks a lot for this helpful information. Will check those websites..I usually order from eBay but the mentioned websites look more professional and detailed. Truly this hobby needs kind and knowledgeable ppl like yourself 👍 Highly appreciated
I have a Kenwood KE 7090 Graphic Equalizer worked fine still sort of works but I've noticed when the unit is in standby mode the display is now displaying red horizontal lines which never appeared before, any help would be much appreciated 👍
It can be many reasons. However, I suggest to check anything to do with the signal path: (1) grounding problem (2) soldering joints at PCB (3) transistor leakage (4) defective components.
I'm a total novice when it comes to electronics repair but thanks to your video I was able to identify the problem (purchased a multimeter and test revealed bad power switch) and bring my Pioneer SG-9 back to life !!
Very good video! Thank you for your work.
❤good repairing information
Thanks for watching
Beautiful Equalizer and very professional video on how to repair step by step👌
Could you kindly share how you find substitute transistors? And what values should be considered most important and less important.
Any of your favourite website to buy transistors from?
Much appreciated👍
Thank you for your comments. Generally, I suggest to find the datasheet for the original transistor which you want to replace first. And then find equivalent transistors by searching in the website. Basically, you want to try to match the transistor's Vcb, Vce, Veb, Ic and Pc as close as possible (can go above but not under). Also it may be critical in some situations that current gain (hFE) needs to be in certain value that enable to make amplifier work properly. Try to use low noise and audio-frequency grade type of transistors. The reliable vendors I recommend are Mousers, Digi-Key, Jameco........etc.
@@VintageAudioFan
Thanks a lot for this helpful information.
Will check those websites..I usually order from eBay but the mentioned websites look more professional and detailed.
Truly this hobby needs kind and knowledgeable ppl like yourself 👍
Highly appreciated
I have a Kenwood KE 7090 Graphic Equalizer worked fine still sort of works but I've noticed when the unit is in standby mode the display is now displaying red horizontal lines which never appeared before, any help would be much appreciated 👍
I have the Pioneer SG-9500 and on the board looks like some of solder joints are bad
My set have come one side noise what I am do
It can be many reasons. However, I suggest to check anything to do with the signal path: (1) grounding problem (2) soldering joints at PCB (3) transistor leakage (4) defective components.
Hi folks, I have one of this for sale