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Old 14th Oct 2020, 6:31 pm   #18
Sanbeta
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Join Date: Feb 2012
Location: Lowestoft, Suffolk, UK.
Posts: 256
Default Re: Sony SL-HF950 expert needed

Willow 5

Sorry for the delay in getting back to you.

I've just pulled the info from the 950 service manual.
R611 is the fusible resistor.It does'nt state if it's cement type but it is an unusual looking substance. value is 0.47ohms 1/2 watt.
Sony part number is: 1-217-418-21

The two transistors are made by NEC 2SC3158 and are in positions Q601 and Q602.

The heat thermal paste goes in between the two metal casing areas, and as you pointed out yours is dried up. Heat is the killer here.The transistors have a rubber type membrane .
There are also two non polarized caps that have always gone high ESR when these fail too.I would go with a good quality make and a slightly higher volt rating.to give extra protection.
I can't remember the values but no doubt you will have your psu to see these.

Hope this helps?

Let us know how it goes....................Kev
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