Sansui BA-2000 driver board transistor question

[EastPoint]

Hi, so the BA-2000 service manual does not match what's actually on the board at all.

TR01/02 are 2SA917 and TR15/16 are 2SC735.
If you were rebuilding a BA-2000, would you replace those four?
If you were replacing them, what would you use?
Do they need to be complementary, like KSA992/KSC1845 or KSA1013/KSA2383 for example?

Thank you!

 

[richardpp]

Hi, so the BA-2000 service manual does not match what's actually on the board at all.

TR01/02 are 2SA917 and TR15/16 are 2SC735.

If the above transistors are the ones you have on the board I would be inclined to keep them. They are the same part number and location shown on the schematic although it looks like there are errors in the transistor parts list for the driver board. But I may have misunderstood you.

If you replace TR15/TR16, I would use the complement at TR17/TR18, for example KSC1815 and KSA1015 would work here.

Hope this helps.