RF 400x4

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NickParr666

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Joined 2011
Afternoon,

I've got an old RF 400x4 transana for repair with two dead channels. On powering up I found 27v across the LF and didn't test anything else. I've popped the cover and both Q319 & Q519 shorted between all three legs, R350 open circuit and R348 & R549 missing. I know R350 is 10R and I'm guess R348 & R549 are 150R?

Being that the outputs have failed should I be replacing the A06 & A56 drivers?

One other question, not having worked with SMD before what rating resistors should I be ordering?

Thanks

Nick
 
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