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In Reply to: RE: New Pre & Amp posted by noway on January 23, 2016 at 05:59:43
Yeah been down that road before...speakers are of same age and have had to replace 2 midrange drivers in two separate speakers already.
Since I can get sound from the speakers I ruled them out. And I don't think it's a dirty connection because I really have to push on the jumpers to get any sound ...this only works (sort of) after the unit warms up)
I have given up on any surround mode expect stereo , this at least gives me all soundtracks . eventually it all ends up on one speaker only (always front right) but at least there is sound! Same applies to all audio sources...CD, sacd, DVD, internet/wd
Follow Ups:
I suggested cleaning the jumpers and jacks in an earlier post. Failing that not helping you've at least identified a spot that directly affects the situation. The jacks or some part of the board immediately at the back of the unit has broken contact and is temporarily fixed when you press on that area. If you cannot find anything yourself and you take it in for service, be sure to tell the tech about pushing the jumpers effect on the situation.
Honestly, you've already found the area that needs attention. Hopefully you can fix it yourself.
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Yeah I know I should do this, its just such a pain to disassemble everything !!
OK I don't have any specific electronic cleaner.. Can I use mineral spirits or alcohol ?
If alcohol isopropyl (rubbing alcohol) is good. Use 99.9%. Can be bought at drugstore sometimes have to ask pharmacist.
Note that even just the action of taking out the jumpers and putting back in without any cleaning will help somewhat. Even without a cleaner in case you don't have any around. Maybe this is something you can try without major disassembly.
Cheers!
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
ok so went thru all cleaning...even loosened the pre/out board...
First with it all open and loose - all channels worked...
Tightened it all up again and now the only 2 channels that dont work are FL & Center....they do produce a signal bit sooo low you cant hear it unless you crank it...
I went thru all the decoding formats and this is consistent at this point for where those channels should be producing sound. I see the peak light come on so it seems to be getting the signal
loose solder joints or bad amps for those channels ?
Cover off helps connectivity. Back on physically missaligns it. Can be a solder joint or even a pcb trace that makes/breaks connection. Or just about any internal connection in the area between pre and power amps.
I'm not sure how much to ask you to try versus having a tech look at it.
Next steps would include poking and prodding with the power on. I've had much sucess over the years with friend's and my own equipment. Even trouble shooting by turning the lights off and watching for sparks in the dark when I push and prod. (Sometimes you have to put away the multimeter and be a little unorthodox!)
Would be going into dangerous territory with the power on.
Again, a tech with a schematic might be best.
Sorry the cleaning didn't work.
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
yeah i am drawing the line on playing with it while power is on...done enough electrical work over the years that getting hammered once with 120v is enough for a life time (faulty shielded cable, damn it).
Fact is i know i will need a new preamp as some time for the new tech here and coming. Since i am not set on what i want to do i am going to get an amp first then decide on peamp later. Will use the 9200 as preamp for now.
So what do you guys think on that 7 channel Marantz MM8077 ? i like that fact that it has toroidal power vs large capacity Ei. This baby has got to last an very very long time
Ouch! Sorry to hear about your past experience getting zapped.
I'm not familiar with the Marantz model you are asking about. Hopefully someone here can chime in or perhaps do a search in the forum.
Cheers!
Ed
"I know just enough to get into trouble. But not enough to get out of it."
BTW....anyone here have any experience with Outlaw Audio amps? looking at their 7 channel 7700 unit 7x200w
Does that amp require a 20 amp service?
Too much is never enough
website says 15 but i have 20 so no issues
The TOP Outlaw 7-channel amp takes 2x15amp plugs. I'm guessing that 2 circuits are called for.
Amp puts out a LOT of power.
Too much is never enough
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