Hi,
Just got myself a Marantz PM66SE Amp, but both the speaker outputs are dead, and the fuse in the psu was blown.
Removed the output transistors and changed the fuse, now i get powerlight, but what else can be blown ?
I know i need to buy 2x 2SC3182 and 2x 2SA1265 to replace the bad transistors.
Some help would be nice, thanks in advance
Regards
Ronni
Just got myself a Marantz PM66SE Amp, but both the speaker outputs are dead, and the fuse in the psu was blown.
Removed the output transistors and changed the fuse, now i get powerlight, but what else can be blown ?
I know i need to buy 2x 2SC3182 and 2x 2SA1265 to replace the bad transistors.
Some help would be nice, thanks in advance
Regards
Ronni
These aren't mosfets, but bipolar transistors.
2SB1353
http://www.rohm.com/products/databook/tr/pdf/2sb1353.pdf
2SD2033
Same specifications, but PNP.
Replacements:
2SB649 (npn) and 2SD669 (pnp)
If you can't get 649 and 669, then try the cheap and easly available MJE340/MJE350. But their Ft is only about 10MHz, and Co is higher than 2SB/2SD's 30pF.
2SB1353
http://www.rohm.com/products/databook/tr/pdf/2sb1353.pdf
2SD2033
Same specifications, but PNP.
Replacements:
2SB649 (npn) and 2SD669 (pnp)
If you can't get 649 and 669, then try the cheap and easly available MJE340/MJE350. But their Ft is only about 10MHz, and Co is higher than 2SB/2SD's 30pF.
maybe the AN7026 is broken, unmont the broken output transisotrs, and check voltage on bases of drivers and predrivers transistors
http://www.tomahawk.elsat.net.pl/x.zip
this scheme should be similar to PM66SE, its PM6010
http://www.tomahawk.elsat.net.pl/x.zip
this scheme should be similar to PM66SE, its PM6010
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