Re: Sony SL-HF950 expert needed
Why did you fit a new power supply?
The most common failings on these are the two non polarised capacitors which go high esr and this wiped out one fusible resistor and two transistors.
I've seen this issue on quite a few.Other caps should be checked and changed if needed too but those ones are the usual suspects.
I've found if you replace those non polarized ones with GOOD quality ones maybe with a slightly higher voltage capacity and make sure that heat sync paste is refreshed then this seems to make these reliable.
Heat is the issue here after time and Noel resides in Australia so that will be more of an issue there.Hence the idea of fitting a different unit.
If your 950 has seen high miles the chances are some VU level meter led's will have expired.The hi-fi audio heads will have very limited tracking range and maybe the reel motor plastic bearing will have worn low so that the base magnetic area of the motor starts to lightly rub on the coils (NOT GOOD!).You will notice the normal Playback is affected on the Sony's and too an extent, the fast winds modes as it uses this and the search modes on the Sanyo and if bad enough will cause bad wow and flutter during play mode as it's in the capstan motor. IF this is the case.You will also hear a light cyclic scrape scrape sound as the base plate rubs on the coils
You can fit a tiny plastic bushing of a suitable material and it does work. I've had to do that on a few Sony's and a couple of Sanyo's too.Yes it works on those too but is fitted at the top bearing.
...Kevin
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