Parasound Amp Pro needed!

Inspector 24
Inspector 24 Posts: 1,308
edited March 2012 in Electronics
Amp is a Parasound HCA-1206, I noticed that the right channel wasn't putting out the volume it should be, fixed what I thought was a wiring problem but it came back...

Started wiggle testing and found the volume control knob to induce static in the sound and would not hit the same volume as the other channel, so I'm thinking its bad... Is it possible to bypass it by jumping a wire to the volume knobs terminals on the board?
Up
LSi15 LSiC - RX-V3000

Down
LSiM707 - 706c - 702f/x - Dual HSU VTF-15H Mk2
Parasound HCA-3500 - HCA-2003A - Marantz SR7005
Sim2 D60 - Dragonfly 106" Panny 500

Post edited by Inspector 24 on
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Comments

  • dudeinaroom
    dudeinaroom Posts: 3,609
    edited January 2012
    Yes it is possible. But I think I would get some contact cleaner and spray the volume pot down and work it back and fourth to work the gunk loose, the spray again.
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  • Inspector 24
    Inspector 24 Posts: 1,308
    edited January 2012
    Hey I like that idea! Any particular product you would recommend?
    Up
    LSi15 LSiC - RX-V3000

    Down
    LSiM707 - 706c - 702f/x - Dual HSU VTF-15H Mk2
    Parasound HCA-3500 - HCA-2003A - Marantz SR7005
    Sim2 D60 - Dragonfly 106" Panny 500

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  • dudeinaroom
    dudeinaroom Posts: 3,609
    edited January 2012
    There are many to chose from. I'm not sure which would be the best. The stuff from radio shack or parts express should work fine.
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  • Inspector 24
    Inspector 24 Posts: 1,308
    edited January 2012
    Sweet. I'll give that a shot and post back the results!
    Up
    LSi15 LSiC - RX-V3000

    Down
    LSiM707 - 706c - 702f/x - Dual HSU VTF-15H Mk2
    Parasound HCA-3500 - HCA-2003A - Marantz SR7005
    Sim2 D60 - Dragonfly 106" Panny 500

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  • gdb
    gdb Posts: 6,012
    edited January 2012
    In the audio world, Deoxit seem to be the "gold standard" for contact treatments.

    http://www.caig.com/
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  • FTGV
    FTGV Posts: 3,649
    edited January 2012
    If it's a hermetically sealed pot contact cleaner will not help.
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  • dudeinaroom
    dudeinaroom Posts: 3,609
    edited January 2012
    Good point FTGV, didn't even think about that.
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  • Inspector 24
    Inspector 24 Posts: 1,308
    edited January 2012
    FTGV wrote: »
    If it's a hermetically sealed pot contact cleaner will not help.

    How will I know if it is?
    Up
    LSi15 LSiC - RX-V3000

    Down
    LSiM707 - 706c - 702f/x - Dual HSU VTF-15H Mk2
    Parasound HCA-3500 - HCA-2003A - Marantz SR7005
    Sim2 D60 - Dragonfly 106" Panny 500

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  • gdb
    gdb Posts: 6,012
    edited January 2012
    No holes of any kind whatsoever, none.
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  • tonyb
    tonyb Posts: 32,967
    edited January 2012
    Note, when using a cleaning product such as described above, make sure the amp is dry before turning it on again.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • Inspector 24
    Inspector 24 Posts: 1,308
    edited March 2012
    So, to follow up on this, upon closer examination there are in fact little holes in the volume pots. I kept running out of time to swing by the local Deoxit supplier, so I found this stuff at Radio Shack while getting something else:
    http://www.radioshack.com/product/index.jsp?productId=2103700&numProdsPerPage=60

    Figured I'd give it a shot, and it worked great!

    Thanks for the help guys!
    Up
    LSi15 LSiC - RX-V3000

    Down
    LSiM707 - 706c - 702f/x - Dual HSU VTF-15H Mk2
    Parasound HCA-3500 - HCA-2003A - Marantz SR7005
    Sim2 D60 - Dragonfly 106" Panny 500

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  • VanR
    VanR Posts: 11
    edited March 2012
    That Radio Shack stuff will work just fine. I got a can of it sitting right here. Need to clean a pot in my guitar soon.
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  • soundfreak1
    soundfreak1 Posts: 3,414
    edited March 2012
    If it continues after vleaning vol. Pot have tje output relays checked. They r known to need replacing or they could be rebilt. They are available from parasound. Like abour 25.00each u may need 2 per ch.if u need more help let me know the guy that maintaines my vintage equip. Is a previous parasound field tech.
    Main Rig:
    Krell KAV 250a biamped to mid/highs
    Parasound HCA1500A biamped to lows
    Nakamichi EC100 Active xover
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    OPPO 83 CDP
    Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
    Denon DP-1200 TT. AToc9ML MC cart.
    Monster HTS 3600 power conditioner
    ADS L1590/2 Biamped
    MIT exps2 speaker cable
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