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Marantz SR7300 and Protect Mode: HELP

Discussion in 'AV Receivers & Amplifiers' started by maolen, May 23, 2003.

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  1. maolen

    maolen
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    Hi,

    I am an owner of Marantz SR7300 since December of last
    year. I am very much satisfied with it's sound both in HT
    and HiFi. However, when I watched LOTR (2 towers) DVD,
    my unit went into 'Protect Mode' at least 5 times during
    the whole movie. When it goes into protect mode, sound
    will be cut off for about 5 seconds.

    I do not understand why this happened when my volume
    is only set to -17db. This happens when there is a
    sudden burst of sound. Although the sound is not very
    loud, it seems the sound has much bass. I feel this
    Protect mode is unacceptable in this volume level.

    After a few trials trying to simulate, ff I found out.
    Note: am always simulating the exact scenes where it 1st
    went into protect mode
    1. After pressing reset buttons (back to factory settings)
    I can play it at around -10db but any thing lower will
    go into protect mode
    2. I set my speaker to small, I can play at -5dB volume
    3. Switched off the unit (power cord not plug) for 5 hrs,
    I can play the unit at +7dB (did not try higher as
    volume is already loud)
    4. Allow unit on standby for 3 hours, I can again play it
    only at -10dB. It seems the longer it is on, the lower
    volume I can play.

    I have brought the unit at Singapore Marantz dealer and
    they found no problem with my unit. Technician and
    Salesman told me that my speakers could be the culprit
    as the power sent by the receiver is high which my
    speakers cannot cope and to protect my speakers from
    damage, the receiver goes into protect mode.

    I tried other movies and the same happens to some while
    others are ok. music cds (using analog), the protect
    mode only kicks in when the volume is too loud, about
    +10dB volume.

    I cannot accept that this unit will go into protect mode
    at such a low volume but what can I do? Can anyone who
    has the same receiver (and speakers if possible) to
    try if the same will happen? I feel very helpless and
    am starting to think that my purchase is not good.

    Oh, my speakers are all bookshelf
    Mains: Kef Q1 (91dB sensitivity and 8ohm impedance)
    Center: Kef Q9c (91dB and 8ohm)
    Surround: Kef Cresta2 (90dB and 8ohm)

    Any help and suggestion will be appreciated.
     
  2. paulus

    paulus
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    Could it be a problem with the DVD itself? I assume its not a "proper" copy of 2 towers so the sound on it might be dodgy.
     
  3. maolen

    maolen
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    Have tried it with other DVD titles and the same occurs.
     
  4. Doublecross

    Doublecross
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    I seem to be having a similar problem except mine just started within the last week, and I've owned the unit for at least 6-7 years.

    I'll let you know if I solve my problem!

    Rob
     
  5. Daneel

    Daneel
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    Rob, unless you are a time traveler you haven't owned the SR7300 for 6-7 years ;)

    Maolen, I assume you have checked all your connections for stray wires and the like?
     
  6. maolen

    maolen
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    daneel, i have checked all my wirings. i also tried using only main
    speakers using surround wires. i don't know now where is the
    problem.

    doublecross, can you tell me more on how you are also getting
    the protect mode.
     
  7. Doublecross

    Doublecross
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    Sorry, I meant I am having a similar problem, but it's with my Sony GX700ES. I made a thread about it which is still on the first page.

    My stereo worked perfectly at any volume for 6-7 years until last weekend when I took it up to a cottage and it started shutting itself down with it's "protect mode" every once in a while. It made me wonder if I was getting power surges because the cottage was very old and probably didn't have the best electrical system.

    Now that I'm back home, I can only turn it on for about 5 seconds before it goes into protect mode every time. Even if I leave it turned off over night before turning it on.

    Very frustrating.

    Rob
     

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