Sony TA-F6B Repair And Restoration

This Sony TA-F6B solid state integrated amplifier is in pretty good cosmetic shape but needs some repair and restoration.

When powering up this Sony TA-F6B there is a slight clicking sound but no other indication that the unit is on.

I have removed the top cover of this Sony TA-F6B integrated amplifier to take a closer look.

I have removed the power supply cover. This power supply has a reputation of failing as it runs on the warm side.  

The power supply in the Sony TA-F6B is unusual for a solid state vintage amplifier for it's design as well as it producing 300+ volts DC.  

The transistor and capacitor shown below failed blowing a piece of the artwork off which I repaired by inserting a wire.

Almost certainly both the transistor and capacitor did not fail at the same time. One component failed and took the other one out with it.

With the artwork repaired along with replacing the defective transistor and capacitor this Sony TA-F6B powered up fine.

The voltages from the power supply measured correctly so now I'll continue with the repair and restoration of this Sony TA-F6B amplifier.

I have removed the faceplate and knobs for cleaning as well as to allow me easier access to the switches and pots.

Any vintage repair or restoration involves some disassembly and this Sony TA-F6B integrated amplifier is no exception.

With the boards removed it is much easier to properly clean the pots and switches with deoxit.

Deoxit is a great product but it can make a mess if you spray it all over. With the boards removed I can get the spray where I need it.

The Sony TA-F6B has enough slack in the cables so that you can get where you want without to much of an issue.

I wish all the vintage stereo equipment had this much slack in the cables.

With boards removed it's a great time to clean up the chassis. Any vintage repair or restoration involves a lot of cleaning.

The Sony TA-F6B power supply is under a lot of stress so I will replace all of the electrolytic capacitors within the power supply.

The capacitors will be upgraded to 105 degree centigrade rated Nichicon PW series.

I have the capacitors replaced. This Sony TA-F6B repair and restoration is getting closer to completion.

I have reinstalled the power supply and I'll get the other boards installed. I'll give the TA-F6B a final visual check and then it's time for bench testing.

I adjusted the DC offset as well as the bias to factory specifications. The Sony TA-F6B service manual has all of the adjustment details

I'll use a signal generator along with a distortion analyzer to test out this Sony TA-F6B integrated amplifier.

This Sony TA-F6B tested out very well on the test bench.

This Sony TA-F6B integrated amplifier repair and restoration is complete. It's time for some music!

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