Hi
I got a Sony TA-2000F with a defect power supply card.
The power transistor sony 2sd69 is defect.
Searching around and cant find any replacement part.
Any idea? where to search?
br
Tommy
I got a Sony TA-2000F with a defect power supply card.
The power transistor sony 2sd69 is defect.
Searching around and cant find any replacement part.
Any idea? where to search?
br
Tommy
2SC2837 Sanken | Discrete Semiconductor Products | DigiKey
is similar but in a different package.
The amplifier is from 1976!
is similar but in a different package.
The amplifier is from 1976!
Thank's 🙂
Maybe this is useable?
BDX12 Transistor Silicon NPN - CASE: TO3 MAKE: STMicroelectronics | eBay
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Well Cosmo61 both John,s choice and your choice will work the main specs are in the correct range but the problem with equivalent books when recommending a substitute is the smaller specs and I always look at the biasing for a set output gain and your -
2SD69 has an HFE of 60+ at 100ma bias .
Your circuit is designed to those specs the others need a much heavier current for (approx ) the same output.
The original BJT is a bit of an oldball,one book quotes your replacement choice but whatever one you choose check the power voltage output .
2SD69 has an HFE of 60+ at 100ma bias .
Your circuit is designed to those specs the others need a much heavier current for (approx ) the same output.
The original BJT is a bit of an oldball,one book quotes your replacement choice but whatever one you choose check the power voltage output .
Thanks for the input.
Maybe it's harder to get a replace part that i thought 🙂
Without rebuild the circuit.
The 2SC926A-5 control the bias max 30mA
Maybe soon or later an original part shows up on ebay
Transistor 2SC926A-5 datasheet - Sony
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Supplied through fleabay ... If you don't fix the fault before fitting, you will never know if the replacement is fake or not.
Looking at the schematics, there is not a 2SD69 fitted, it was originally 2SD28.
I would fit a 2N3055 or anything of that spec.
There is a maximum of 45volts DC on it and the current draw is minimal. Or am I looking at the wrong transistor?
I would fit a 2N3055 or anything of that spec.
There is a maximum of 45volts DC on it and the current draw is minimal. Or am I looking at the wrong transistor?
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Thank's
It something going on here.
The 2sd69 dont exist in the circiut.
Maybe someone switch it earlier?
The Q 904 is replaced with 2sd69 on the circiut (185 to 150v rail).
The original in the Sonys partlist is 2sc807. 😀
2SC807
Datasheet, Equivalent, Cross Reference Search. Transistor Catalog
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The 2SC807 has the same bias as the (now corrected by Jon ) 2SD28 so personally I would be inclined to fit your choice.
You got two rails voltage, 2sd28 is working. The problem was that someone switch the transistor for the high voltage rail (150V). to 2sd69.
replacement part for 2sc807?
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