I am desperate for help with my amp

[seafire]

Hi guys
I have a Marantz pm 94 that popped fets.I fixed it and fried them again.I have now replaced all again and the amp switches on without tripping.Sorry i'm a novice so I need to ask some questions.I have 60v on all three legs of my mosfets a s well as the pre drivers.Does this mean there is a short?.What controls the power to the Base Emmitter and Collector.Ie the diagram shows 5 v to x2 legs and 60v to one leg.Where should i look Diodes??.The wiring diagram and Service Manual are down loadable free of charge at HI FI ENGINE.Please guys I am really desperate.I have been fixing this amp for two months after work every night.
Seafire

[Netlist]

I'm too lazy to search, got a link to the manual?

[gaetan8888]

Hello

Here it is;

http://www.hifiengine.com/manuals/marantz/pm-94.shtml

Bye

Gaetan

[seafire]

Originally Posted by Netlist

I'm too lazy to search, got a link to the manual?

Hi netslist.Can I upload the manual here because you need to register with HI FI ENGINE.http://www.hifiengine.com/.
If so how do I upload here?

Thank you in advance Seafire

[seafire]

Originally Posted by gaetan8888

Hello

Here it is;

http://www.hifiengine.com/manuals/marantz/pm-94.shtml

Bye

Gaetan

Thank you Gaetan

[gaetan8888]

Hello

No need to register to download it from that other web site;

http://www.audio-circuit.dk/Schemati...94-pwr-sch.pdf


Bye

Gaetan

[Netlist]

No, you can't upload it here because of the 100k file limit (could be some more but sure not enough to upload a manual).

[seafire]

Originally Posted by Netlist

No, you can't upload it here because of the 100k file limit (could be some more but sure not enough to upload a manual).

Ok Netlist I will wait then till you download it.Gaetan has found a site without registration.

Ok I see it is only the wiring diagram.However I know every part on there if that would help.Sorry like I said I am a total newbie that threw myself in the deep end!

[Netlist]

Originally Posted by seafire

Sorry like I said I am a total newbie that threw myself in the deep end!

I was hesitant to ask it but since you said it yourself...
Let me be honest with you: amps like that require a lot a technical skills to fix properly. I'm not saying you can't acquire these skills by studiyng but tackling such a amp as a first(?) project will only end up in frustration.
Also, in all honesty, I don't have the time to help you through these learning stages, others might.

/Hugo

[seafire]

Originally Posted by Netlist

I was hesitant to ask it but since you said it yourself...
Let me be honest with you: amps like that require a lot a technical skills to fix properly. I'm not saying you can't acquire these skills by studiyng but tackling such a amp as a first(?) project will only end up in frustration.
Also, in all honesty, I don't have the time to help you through these learning stages, others might.

/Hugo

That is understandable but I have got this far and I have a feeling it is something silly.
All I need to know is what controls what current goes to where on the fets?.Is it the transistors that switch current to the mosfets.I have already gone through most of the diodes and zeners...I have new ones to compare too.I have each and every transistor on the driver board new in stock so should i just replace them all ?.I AM THROWING THE BOOK AT THIS ONE...COME TO FAR TO GIVE UP.Just which I had more electronic knowledge but I must admit I have come a long way in two month