was wondering what mods i could do on my pm66se before i stumbled onto this thread ...
a schematic would certainly help lots.
anyone here tweaked or modded this amp? can share some experience?
a schematic would certainly help lots.
anyone here tweaked or modded this amp? can share some experience?
Not much to do on this amp:
-improve the power supply (larger transformer + bid elcos) + bypass capcitors on IC power pins gives better bass and slightly iomproved sound clarity
-changing the input electrolytic caps for MKP or Silmic improves also a bit further
-bypassing the input switching board and tone seection board byhardwiring directly the CD input to the board also improves the sound.
I send you by e-mail the schematics of the PM6010F (in pdf) which are strictly identical to the PM-66SE schematics I have in paper form.
Personal advice: best is to keep the case and put two TDA7293 ICs inside....
-improve the power supply (larger transformer + bid elcos) + bypass capcitors on IC power pins gives better bass and slightly iomproved sound clarity
-changing the input electrolytic caps for MKP or Silmic improves also a bit further
-bypassing the input switching board and tone seection board byhardwiring directly the CD input to the board also improves the sound.
I send you by e-mail the schematics of the PM6010F (in pdf) which are strictly identical to the PM-66SE schematics I have in paper form.
Personal advice: best is to keep the case and put two TDA7293 ICs inside....
eborgard said:
Since my amp is also broken and needs fixing, I thought why not go ahead and improve it while repairing.
So can anyone eleborate how to put two TDA7293 inside ?
About TDA7293, you CANNOT run 4 ohm speakers with a single one, i did this and then this bass note hit and that caused the ic to literally explode, i used 35+vdc.
They need to be two in paralell with 25-30vdc absolute maximum to be able to run 4ohhm loads, for 8 ohm you can run 35vdc power supply.
See my TDA7293 amp:
They need to be two in paralell with 25-30vdc absolute maximum to be able to run 4ohhm loads, for 8 ohm you can run 35vdc power supply.
See my TDA7293 amp:
An externally hosted image should be here but it was not working when we last tested it.
From the number of reports of blown thermal fuses in this thread, increasing the the bulk capacitance or uprating the rectifier diodes is asking for trouble with this amp. Anything that makes the diode conduction shorter and more peaky is going to make the transformer even hotter.
Hi - I'm another one new to this - my PM-66SE is currently lying in pieces on the floor, I've bought some electrical bits and bobs to test it with and now haven't got a clue what I'm doing.
If somebody still has a copy of the schematics could you mail them to houli2001@aol.com.
I'll upload them to my web site and post a download link if someone can send them through.
Thanks
If somebody still has a copy of the schematics could you mail them to houli2001@aol.com.
I'll upload them to my web site and post a download link if someone can send them through.
Thanks
What a coincedence 🙂
Mine broke sometime ago as well... And I started to think even to upgrade it after repairing it...
However today one of the caps exploded
And now I am even in worse state then I have started...
Does your Pm-66 turns on at all ? i.e. the led is on, but it doesn't click...
Mine broke sometime ago as well... And I started to think even to upgrade it after repairing it...
However today one of the caps exploded
And now I am even in worse state then I have started...
Does your Pm-66 turns on at all ? i.e. the led is on, but it doesn't click...
Hi Tekko,
As I am slowly loosing my hope to repair my amp, I am started to think about your idea about keeping the case and pou separate kits inside...
Whre can I get my hold of amps like yours ?
Do you also have a pre-amp ?
Thanks.
Tim
As I am slowly loosing my hope to repair my amp, I am started to think about your idea about keeping the case and pou separate kits inside...
Whre can I get my hold of amps like yours ?
Do you also have a pre-amp ?
Thanks.
Tim
Hi Tim,
Most amplifiers can be repaired unless the board burns or an unobtainable part is bad. You do need patience and an organized approach.
-Chris
Most amplifiers can be repaired unless the board burns or an unobtainable part is bad. You do need patience and an organized approach.
-Chris
HI Chris,
Yes you are actually right, but seeing that the amp is actually went for 97 euros in Ebay...
http://cgi.ebay.de/Marantz-PM-66-SE...ryZ75966QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I started to rethink whether it worths to repair it.. The price I paid for the spares including the delivery was around 50, and it didin't work at all ...
Yes you are actually right, but seeing that the amp is actually went for 97 euros in Ebay...
http://cgi.ebay.de/Marantz-PM-66-SE...ryZ75966QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
I started to rethink whether it worths to repair it.. The price I paid for the spares including the delivery was around 50, and it didin't work at all ...
Hi Tim,
Of course, the value of whether it's worth it or not also depends on how much value you are willing to place on the educational value. It's only a mistake to fix it if you don't learn anything. 😉
-Chris
Of course, the value of whether it's worth it or not also depends on how much value you are willing to place on the educational value. It's only a mistake to fix it if you don't learn anything. 😉
-Chris
PM66SE SCHEMATICS
Having read the posts on the PM66SE, has anyone managed to repair a faulty one yet from here. I have a faulty one but if people have tried without success It might not be worth it. I could put the money for spares towards another AMP.
Can someone please forward me the Schematics Thanks guys
Kajmambwe@hotmail.com
Having read the posts on the PM66SE, has anyone managed to repair a faulty one yet from here. I have a faulty one but if people have tried without success It might not be worth it. I could put the money for spares towards another AMP.
Can someone please forward me the Schematics Thanks guys
Kajmambwe@hotmail.com
Hi Kajman,
If I had one or more, I could fix it (them). The answer to your question depends on your experience and test equipment available. The schematic is also necessary sometimes. Your skill will also steer you away from fake parts for the most part (we all get stuck with them sometimes).
If you don't have much experience you may have someone you know who can help. You can ask questions on the board too. But you need to know enough to understand the answers given.
-Chris
If I had one or more, I could fix it (them). The answer to your question depends on your experience and test equipment available. The schematic is also necessary sometimes. Your skill will also steer you away from fake parts for the most part (we all get stuck with them sometimes).
If you don't have much experience you may have someone you know who can help. You can ask questions on the board too. But you need to know enough to understand the answers given.
-Chris
Hi Kajman,
Ok Chris convinced me to go on with the reapirs, therefore I decided to gove it another go 🙂
I will update the comunity with my progress here.
But may be we can help each other, what kind of problems do you have with your amp.
Ok Chris convinced me to go on with the reapirs, therefore I decided to gove it another go 🙂
I will update the comunity with my progress here.
But may be we can help each other, what kind of problems do you have with your amp.
Toman_9: I bought the ICs (a pack of ten pcs) to those amps on ebay, the boards from www.jamesaudio.com and the components from a company called ELFA.
- Status
- Not open for further replies.