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Old 7th September 2009, 08:06 PM   #1
seafire is offline seafire  Mauritius
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Default Newbie on a marantz pm94 help

Hi everybody,
Well as a absolute amateur I am very proud of myself.I got a PM94 MARANTZ from my sister with popped fets.Had a severe mishap at work and broke / shattered my tibia...so in a cast for 4 months!.The positive side is that I had a lot of time to teach myself about electronics and with the help of forums have come a long way!.Ordered new replacement fets sj200 / sk159 and replaced the resistors and VIOLA a sweet sounding amp. Now the funny part -being the amateur that I am I then proceeded with DC OFFSET -no problem Then IDLING CURRENT adjustment POP POP POP THE FETS WENT ONE BY ONE .The sad part is I now have myself in deeper trouble -damaged the comparator . Nobody told me how sensitive the pots are.So now I have a problem-I popped the driver board trannies too and cannot find them in stock anymore.They are NEC 2SA 1142 / NEC 2SC 2682.I have been advised by electronics store suitable replacement is 2SA1352 / 2SC 3502.Somehow with my limited knowledge I am not convinced.I have a couple of more questions about zener diodes etc for this amp so I will wait till someone with knowledge throws this newbie a boneRegards Seafire
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Old 8th September 2009, 12:43 PM   #2
seafire is offline seafire  Mauritius
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Default No responses yet

Come on guys how about a little advice here
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Old 10th September 2009, 07:20 AM   #3
seafire is offline seafire  Mauritius
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Default Help please!!

Could I use Hitachi 2SB649A???
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Old 10th September 2009, 05:53 PM   #4
seafire is offline seafire  Mauritius
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Default Help please!!!!

Please guys I don't know enough about transitors specifications to make the correct judgement
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