Transistor Replacement for Sansui (A-9) Integrated DC Servo Amplifier

[Flamedemon]

I recently purchased this amplifier as non-working and when I tested it the left channel sounds distorted. I opened it up, tested the transistors and found one of the left transistors is broken.

I want to replace them all. Does anyone know a matching one that I can purchase on digikey or some place in Calgary, AB?

 

[Sandman1221]

The teal T on left-side bottom pic looks like the solder is not factory, looks very messy. Same for other Ts.

 

[Flamedemon]

The teal T on left-side bottom pic looks like the solder is not factory, looks very messy. Same for other Ts.

Yeah I'm not sure if this was repaired before in the past, but I know what you mean with the solder being very messy. I believe the transistors are original tho

 

[Sandman1221]

In second pic, right T, looks like there is a solder bridge between legs. Bottom pic bulging caps bellow Ts.

 

[Flamedemon]

In second pic, right T, looks like there is a solder bridge between legs.

I desoldered 2 of the legs from each transistor to test in circuit

 

[zenith2134]

Yeah I'm not sure if this was repaired before in the past, but I know what you mean with the solder being very messy. I believe the transistors are original tho

It was, for sure.

 

[Flamedemon]

Either way I would like to have the transistors all replaced. Anyone know a matching replacement?

 

[kwayde]

Either way I would like to have the transistors all replaced. Anyone know a matching replacement?

Type 2sa1265 or 2sc3182 in the search bar in the upper right corner.

You'll find something there.

Here's just one thread I found:
https://audiokarma.org/forums/index...sc3182-substitutes-blown-marantz-pm75.923702/

 

[rothwellaudio]

Yikes - that's some of the worst soldering I've ever seen!

 

[tarior]

That board is a disaster. Yeesh.

For outputs, look at Toshiba 2SC5200N/A1943N at Digi-Key.

 

[Flamedemon]

That board is a disaster. Yeesh.

For outputs, look at Toshiba 2SC5200N/A1943N at Digi-Key.

Thank you so much! I managed to fix the amp and fix the soldering!