Marantz PM7200 2-Channel Amplifier Logo

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Posted on Feb 23, 2008

Marantz pm 7200

My marantz pm 7200 will not turn on after a trouble free year! changed the glass fuse's still no joy? i have been told it could be the transformer?

  • 3 more comments 
  • Anonymous Jun 03, 2008

    I had the same problem, where the amplifier was dead, turned out to be the front microprocessor, hope this helps.

  • Anonymous Nov 14, 2008

    another with the same problem has anyone sorted it out yet ?

  • admglvr1967 Mar 19, 2009

    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?!

  • Nick Foletti
    Nick Foletti Nov 24, 2013

    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.

  • Anonymous Mar 24, 2014

    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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  • Posted on Feb 24, 2008
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Could be a power supply failure or a Power "On" switch failure.

Kev

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Related Questions:

1helpful
3answers

Marantz pm 7200 amplifier

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 !

users
https://www.manualslib.com/manual/99021/Marantz-Pm7200.html?page=7&term=ohm&selected=3#manual



service
https://www.manualslib.com/manual/837384/Marantz-Pm7200n1b.html
tip

Marantz SR-7200 reset

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.
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You don't see any glass fuses? There is also a non replaceable fuse in the power transformer.
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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!
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Marantz pm 7200 lost sound, only works when volume is up high, still looks like there are no high or medium frequencies.

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.
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The fuse keeps blowing in my marantz pm-57 amplifier. It says it takes a T 2.5A 250V fuse. I can only find 2.5A 250V fuses. What relevance is the ''T''.

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.
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Marantz Pm-7200 left channel weak compared to the right

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.
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May be the problem solved here :
http://www.audiotoolers.com/ubbt/ubbthreads.php/ubb/showflat/Number/5316/page/1#Post5316

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Marantz amplifier pm-34

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.
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