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EICO HF-30 SERVICE MANUAL

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
311.6 KB
Page
4
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    EICO HF-30 HF30 HF 30
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Relevant AUDIO forum topics:
Rotel RA-980BX equivalent transistors
Hi All,


I have a Rotel RA-980BX amp with a blown channel. I have sourced most of the transistors, but am struggling to find the other 4.


Part numbers as follow:
2SC3478
2SC4381
2SA1376
2SA1667


What would be suggested equivalents / suitable replacements?


Also, some advice, I suspect the bias pot to be bad. Based on the circuit, would you think that the bad bias pot would cause the drivers and outputs to blow? Any suggestion on modification to prevent this re-occurring?


Thanks



Regards,
Werner
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