Hi,
After working on quite a few Sansui amps and encountering the dreaded fuse resistors on many of them, I thought it might be worthwhile to post up some information on where they are in various amps and receivers, what symptoms are typically present when these go faulty, and what to do about replacements.
Contributions are welcomed from other AK'ers, and I will index these in this first post.
Starting at the end.... it has been well documented by others here that the typical 1/4W fuse resistor used by Sansui in many of their amps and receivers can be replaced by either good quality 1/4 or 1/2 Watt Metal Film resistors, and that is the path I have taken on many occasions and have yet to encounter any problems with this approach.
The typical fuse resistor that gives problems can a light grey , greyish blue or light green colour, and looks like these ones shown below
The following posts will show the position of fuse resistors in the AU117 through AU717, plus the AU 2900/3900/4900 series. As stated above posts are welcome on other amps/receivers, and any comments are more than welcome.
Some of the typical symptoms of out of spec (high resistance) or open circuit fuse resistors are (in the affected channel) - distorted output, low bias reading and/or inability to set correct bias, low gain and pops/crackles/noise.
I hope this is of use and gives a little back to the excellent Sansui fraternity we have here on AK.
AU117
AU217II
AU417
[URL="http://www.audiokarma.org/forums/showpost.php?p=5544295&postcount=18]5050[/URL]
Cheers
John
After working on quite a few Sansui amps and encountering the dreaded fuse resistors on many of them, I thought it might be worthwhile to post up some information on where they are in various amps and receivers, what symptoms are typically present when these go faulty, and what to do about replacements.
Contributions are welcomed from other AK'ers, and I will index these in this first post.
Starting at the end.... it has been well documented by others here that the typical 1/4W fuse resistor used by Sansui in many of their amps and receivers can be replaced by either good quality 1/4 or 1/2 Watt Metal Film resistors, and that is the path I have taken on many occasions and have yet to encounter any problems with this approach.
The typical fuse resistor that gives problems can a light grey , greyish blue or light green colour, and looks like these ones shown below
The following posts will show the position of fuse resistors in the AU117 through AU717, plus the AU 2900/3900/4900 series. As stated above posts are welcome on other amps/receivers, and any comments are more than welcome.
Some of the typical symptoms of out of spec (high resistance) or open circuit fuse resistors are (in the affected channel) - distorted output, low bias reading and/or inability to set correct bias, low gain and pops/crackles/noise.
I hope this is of use and gives a little back to the excellent Sansui fraternity we have here on AK.
AU117
AU217II
AU417
[URL="http://www.audiokarma.org/forums/showpost.php?p=5544295&postcount=18]5050[/URL]
Cheers
John
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