Budget Hi-Fi - The Gorgeous Sony TA-3650 Integrated Amplifier

[@mattw.3084]

Do I need one? No do I want one? Yes. Might be a nice sibling to go with my TA 1055

[@tee-jaythestereo-bargainph2120]

Sony made one that looked like this but with dual VU meters

[@dednside5229]

And F6

[@mat.b.]

are those 2 small blue cans the filter caps? for a 50w i thought it would be in line with other 70s models

[@LiquidAudio]

Good question and no, those are most definitely not the main filters. They are hidden underneath the power supply board to the front left and are generously rated for such a modest amp.

[@marcelomandille4881]

Hola quería saber qué tipo de clase es este amplificador : es clase A o es clase AB ?

[@edwinfelisilda4926]

Hi this amp is vfet transisitor

[@LiquidAudio]

Hi Edwin, no, it isn't, the TA-3650 is a bipolar transistor design.

[@marygracecuizonfelisilda8496]

I got this amp last week and this sony 3650 is very good amp monater amps.the sound quality very nice.

[@edwinfelisilda4926]

Hi is this amps low end or hi end

[@edwinfelisilda4926]

This amplifier is class a?

[@igorkukuruc6228]

Filter is double C its consist of 2 C in 1 case capacity is 2 x 10 000 uF... look on the service manual...

[@igorkukuruc6228]

The bad movement of the potentiometers is caused by a 2 dB graduation ... you see it on the scales

[@LiquidAudio]

Hi Igor, thanks for your comment and yes you are correct, there are two capacitors in one can. My point about Sony saving some money here stands though. Keep in mind that these short vids are shot quickly, often with no edits, in between servicing and repairing hi-fi gear. My specialist hi-fi repair business liquidaudio.com.au is a full-time pursuit and takes priority. Please keep things positive and respectful!

[@alejandrotelloperea5255]

Hi ! I have the same Amp. but I have the burnt resistors R324,R325, R374 and R375. Could you tell me the values of this resistors? thanks for the info !

[@LiquidAudio]

Hi Alejandro, I'd need to consult my service documentation, I suggest searching for the service manual yourself as it will be very handy to have. Before replacing the resistors, it's important to determine why they are burned. There are several common scenarios that could cause this so it's wise to investigate this carefully, or have someone else look at it if you are not confident. Remember to look for the diodes that fail in the bias circuit too, this stuff really is critical as failure will kill the VFETs instantly.

[@alejandrotelloperea5255]

@@LiquidAudio Hi again !! I have checked all the components, transistors, capacitors, diodes, etc. and they are all good ,the amplifier works correctly. The resistors are open and burned. But still the amplifier works. I'm a little baffled. these resistors are not listed in the maintenance manual,with id R324,325,374,375 but they are on the board. thanks for your help!!

[@LiquidAudio]

@@alejandrotelloperea5255 Something is not right for those resistors to be burned. How have you tested semiconductors? Have you pulled them and tested them for gain for example? Likewise, how have you tested capacitors and other parts? Interesting regarding the part numbers, I'd really need the unit here in front of me but something is amiss and I suggest you keep searching and carefully remove and test the gain and leakage of all semiconductors that could pull current through those resistors. The unit may have been modified for example. Anyway, good luck in sorting her out!