STK3102N compatible replacements - diyAudio
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Old 17th January 2012, 04:52 PM   #1
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Default STK3102N compatible replacements

Hi people,

i'm in the process of repairing a sony TA-F550ES amp with a dead right channel.
the faulty component is the STK3102N preamp (90-100W)

It seems the STK3102N is no longuer available, but there are some STK3102III and STK3102IV models.

i would like to know if those are compatible !?

thank you for any info !
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Old 18th January 2012, 12:49 AM   #2
sregor is offline sregor  United States
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Could not find spec sheet for stk-3102N, but for the II, and III types. The type III requires a 15 pF cap between pins 4 and 6 and between pins 10 and 12. The type II and III both require a 470 ohm resistor in series with a 68 pF cap between pins 3 and 4, and between pins 12 and 13. These components were internal in the original STK-30X2 driver modules. This assumes the 3102N is the same as a 3102. Check schematic and compare to datasheets for values. YMMV - good luck
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Last edited by sregor; 18th January 2012 at 12:52 AM.
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Old 18th January 2012, 11:52 AM   #3
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thank you for replying.

in fact, it seems the STK3102N is identical to the STK3102III

the required components you mention are already in place on the board.

regards !
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Old 19th January 2012, 12:04 AM   #4
sregor is offline sregor  United States
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One last comment - Some people think the STK driver modules run too hot, and would benefit with a heat sink (a reasonable sized piece of aluminum would do) for improved reliability.
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Old 23rd January 2012, 08:56 PM   #5
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i just wanted to let you know that STK3102III replacement
works like a charm !

cheers !
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Old 24th January 2012, 05:05 PM   #6
sregor is offline sregor  United States
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Good to know.
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