I had the same problem, where the amplifier was dead, turned out to be the front microprocessor, hope this helps.I had the same problem, where the amplifier was dead, turned out to be the front microprocessor, hope this helps.
AnonymousNov 14, 2008
another with the same problem has anyone sorted it out yet ?another with the same problem has anyone sorted it out yet ?
I have no power to my marantz pm7200 amp, have changed fuses but still no lights nothing! is there a possible cause other than the front microprocessor that perhaps i could try myself as this sounds expensive?!I have no power to my marantz pm7200 amp, have changed fuses but still no lights nothing! is there a possible cause other than the front microprocessor that perhaps i could try myself as this sounds expensive?!
Had nothing but problems with this bloody amp,fuse keeps blowing in plug been repaired 3 times. Will not be buying marantz again, only good thing about it was its sound quality.Had nothing but problems with this bloody amp,fuse keeps blowing in plug been repaired 3 times. Will not be buying marantz again, only good thing about it was its sound quality.
AnonymousMar 24, 2014
Marantz PM-48 ticks in and out for 30 minutes, after turning on. Does anyone have a service manual with schematics???Marantz PM-48 ticks in and out for 30 minutes, after turning on. Does anyone have a service manual with schematics???
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2002 made, a 20 year run, not bad for any old AMP. fuses good?????? yes. I got confused in the first post gee I can hear it? but yes the AMP works plays music etc, not told and only tone fails, just that, and we know why. source direct button is pushed in,OOPS now tone is dead by DESIGN if still fails we check all DC supplies to tone board 7000 and clean all switch and relay contacts with electronics spray cleaner as we fully cycle each switch. or pay others huge cash (bread) to do those 2 simple acts. your call !
This was documented on the Marantz website briefly a year ago and is no longer available. My SR-7200 develops "click/pop" problems and a reset cures it of these issues.
While powered "off," on the front panel, press: A/D + FP +Dimmer (3 buttons) and power the unit on.
This reverts to original (out of box) settings. You then must reprogram input sources, speaker setup, levels and radio stations.
Some amps have a button which you press to mute the speakers when the headphones are plugged in. Sometimes marked "Speakers on off". If it hasn't then a new headphone socket would not be expensive to fit. As long as the amp producers sound I don't see any future problems. The previous owner may have used the headphone socket a lot, and simply wore it out!
You have either lost the pre-amp stage or the Main Amp stage. Since you have a problem on both channels it most be a part that is common to both channels. Something like an IC I would suspect.
Goo day sir, the T on the fuse has nothing to do on you marantz fuse blowing up, chances are you amplifier is shorted, check you IC amplifier/power transistor for shorts. Check also your speaker impedance. usually they are 8 ohms. You can use a technician's multitester device to check the impeadance. An imbalance or mismatch speaker can cause a fuse to blow and destroy your amplifier. hope this helps.
hmmm. Let's start by swapping the wires you are using for your speakers. Double check the wire connections first, then take the left and place iton the right and vice versa.
the transformer has an internal thermal fuse. If you study the terminations coming out from the internals of the transformer you may notice either a pair of tinned thicker wires or insulated. This may be open circuit. I have often bypassed this internal fuse(they are notoriously common failures) to get a transformer going. You can get a replacement one from a parts supplier if you felt the need. I would just bypass it anyway.:)This may make the amp somewhat "illegal" in the US. We use the MEN (multiple earth neutral) mains power distribution in Australia and the transformer(if melting) would short out to earth and blow the mains primary fuse, the internal thermal is a US requirement.
I had the same problem, where the amplifier was dead, turned out to be the front microprocessor, hope this helps.
another with the same problem has anyone sorted it out yet ?
I have no power to my marantz pm7200 amp, have changed fuses but still no lights nothing! is there a possible cause other than the front microprocessor that perhaps i could try myself as this sounds expensive?!
Had nothing but problems with this bloody amp,fuse keeps blowing in plug been repaired 3 times. Will not be buying marantz again, only good thing about it was its sound quality.
Marantz PM-48 ticks in and out for 30 minutes, after turning on. Does anyone have a service manual with schematics???
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