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Thread: Rotel RA840

  1. #1
    Join Date: Jan 2008

    Location: West Yorkshire

    Posts: 714
    I'm Andy.

    Default Rotel RA840

    Last year a friend asked me to look at his amp as no longer working.
    Took it apart and noticed a few poorly caps so replaced all the caps in the PSU and some on the main power/tone board.
    Replaced the blown fuse and plugged it in - stayed on for around 5 seconds then the fuse blew

    Checked everything and all looked good but told him to buy another one (he had it since new!!)

    Should I skip it or have another crack - as in is it worth saving?





    Cheers
    Main system:
    Analogue.
    Michell Orbe with arm decoupling kit & Pete's Pylons. SME V arm, Denon DL103M (FGS), Firebottle OPT MKII phono amp
    Technic SP-10 in Obsidian plinth, AT1010 PMAC v8b arm, Goldring Elite MC Cart and BB3 Phono Amp
    Leak Lenco GL75 with Ortofon OM10 cartridge
    Technics RS-BX404 Cassette Deck
    Network Player.
    Raspberry PI plus R2-R DAC (also used as a CD player) plus Pi NAS Server
    Digital.
    Philips DCC 730 player
    Marantz CD50SE
    Amp.
    Audiolab 8000A
    Speakers.
    Reiver Jenna floor standers
    HeadPhones.
    Sennheiser HD545 Ref, HD600, HD477

  2. #2
    Join Date: Jan 2008

    Location: West Yorkshire

    Posts: 714
    I'm Andy.

    Default

    Off to the council tip tomorrow so will take it there - cheers for the feedback.
    Main system:
    Analogue.
    Michell Orbe with arm decoupling kit & Pete's Pylons. SME V arm, Denon DL103M (FGS), Firebottle OPT MKII phono amp
    Technic SP-10 in Obsidian plinth, AT1010 PMAC v8b arm, Goldring Elite MC Cart and BB3 Phono Amp
    Leak Lenco GL75 with Ortofon OM10 cartridge
    Technics RS-BX404 Cassette Deck
    Network Player.
    Raspberry PI plus R2-R DAC (also used as a CD player) plus Pi NAS Server
    Digital.
    Philips DCC 730 player
    Marantz CD50SE
    Amp.
    Audiolab 8000A
    Speakers.
    Reiver Jenna floor standers
    HeadPhones.
    Sennheiser HD545 Ref, HD600, HD477

  3. #3
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 99,005
    I'm Grant.

    Default

    Sorry no assistance was offered. Usually some of the techs will give advice. Must have missed the post
    Regards,
    Grant .... ؠ ......Don't be such a big girl's blouse

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    FIIO K7 BT, M11 PLUS, BTR7, KA5 - OPPO BDP-103D - PANASONIC UB450 - PANASONIC 4K ULTRA HD TV - PIXEL 6 - AVANTREE LR BLUETOOTH - 2* X600 SOUNDCORE - HEADPHONES INCLUDE, FIIO, NURAPHONES', FOCAL, OPPO, BOSE, CAMBRIDGE, BOWER & WILKINS, DEVIALET, MARSHALL, SONY, MITCHELL & JOHNSTON - 2*ZBOOK'S- MERCURY BD ROM, ROON, QOBUZ, TIDAL, PLEX, CYBERLINK, JRIVER - MULTI HDD'S -

    Oh my god! There's nothing wrong with the bidet is there?

    “Nothing discloses real character like the use of power. It is easy for the weak to be gentle. Most people can bear adversity. But if you wish to know what a man really is, give him power. This is the supreme test. It is the glory of Lincoln that, having almost absolute power, he never abused it, except on the side of mercy".

    “You see these dictators on their pedestals, surrounded by the bayonets of their soldiers and the truncheons of their police ... yet in their hearts there is unspoken fear. They are afraid of words and thoughts: words spoken abroad, thoughts stirring at home -- all the more powerful because forbidden -- terrify them. A little mouse of thought appears in the room, and even the mightiest potentates are thrown into panic.”

    "You don't have free will. You have the appearance of free will.”

    “There's a war out there, old friend. A world war. And it's not about who's got the most bullets. It's about who controls the information. What we see and hear, how we work, what we think... it's all about the information!”


    ***SMILE, BE HAPPY***

  4. #4
    Join Date: Jan 2008

    Location: West Yorkshire

    Posts: 714
    I'm Andy.

    Default

    No problem.
    Main system:
    Analogue.
    Michell Orbe with arm decoupling kit & Pete's Pylons. SME V arm, Denon DL103M (FGS), Firebottle OPT MKII phono amp
    Technic SP-10 in Obsidian plinth, AT1010 PMAC v8b arm, Goldring Elite MC Cart and BB3 Phono Amp
    Leak Lenco GL75 with Ortofon OM10 cartridge
    Technics RS-BX404 Cassette Deck
    Network Player.
    Raspberry PI plus R2-R DAC (also used as a CD player) plus Pi NAS Server
    Digital.
    Philips DCC 730 player
    Marantz CD50SE
    Amp.
    Audiolab 8000A
    Speakers.
    Reiver Jenna floor standers
    HeadPhones.
    Sennheiser HD545 Ref, HD600, HD477

  5. #5
    Join Date: Jan 2011

    Location: manchester

    Posts: 216
    I'm chris.

    Default

    Shorted transistor, resistor, cap, dry joint, problem diode, take your pick to look for first but you do need a little more time for a reply.

  6. #6
    Join Date: Jan 2008

    Location: West Yorkshire

    Posts: 714
    I'm Andy.

    Default

    Quote Originally Posted by reddish75 View Post
    Shorted transistor, resistor, cap, dry joint, problem diode, take your pick to look for first but you do need a little more time for a reply.
    Thanks.
    Main system:
    Analogue.
    Michell Orbe with arm decoupling kit & Pete's Pylons. SME V arm, Denon DL103M (FGS), Firebottle OPT MKII phono amp
    Technic SP-10 in Obsidian plinth, AT1010 PMAC v8b arm, Goldring Elite MC Cart and BB3 Phono Amp
    Leak Lenco GL75 with Ortofon OM10 cartridge
    Technics RS-BX404 Cassette Deck
    Network Player.
    Raspberry PI plus R2-R DAC (also used as a CD player) plus Pi NAS Server
    Digital.
    Philips DCC 730 player
    Marantz CD50SE
    Amp.
    Audiolab 8000A
    Speakers.
    Reiver Jenna floor standers
    HeadPhones.
    Sennheiser HD545 Ref, HD600, HD477

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