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Project: SX-1250

Discussion in 'Pioneer Audio' started by Super Noob, May 27, 2018.

  1. kevzep

    kevzep Its all about the Music Subscriber

    I haven't been using the shield with the fader lube, as I understand the faderlube has lubricating properties.....and leaves that lube residue behind which protects as well, a bit like the shield does.
    DN5 is actually very aggressive, so does a good job.....but in doing as as we discussed leaves it open for new oxidation to begin..
     

     

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  2. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Here we go... wrapped up.

    Control Amp = AWG-41
    Before
    [​IMG]
    After:
    [​IMG]
    Parts Changed:
    [​IMG]
     
    Last edited: Jun 23, 2018
  3. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Filter Amp = AWM-089
    Before:
    [​IMG]
    After:
    [​IMG]
    Parts:
    [​IMG]
     
    Last edited: Jun 23, 2018
  4. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Flat Amp = AWG-042
    Before:
    [​IMG]
    After:
    [​IMG]
    Parts:
    [​IMG]
     
  5. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Function Switch = AWS-094
    [​IMG]

    [​IMG]
     
  6. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Fused Power Board = AWR-107
    Before:
    [​IMG]
    After:
    [​IMG]
    Parts:
    [​IMG]

    MAL213819471E3 / Vishay / 470uf 100v / 105c
     
    Last edited: Jun 23, 2018

     

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  7. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Power Supply Board = AWR-106
    Before:
    [​IMG]
    After:
    [​IMG]
    [​IMG]
    Parts:
    [​IMG]

    Full Rebuild
     
    Last edited: Jun 23, 2018
  8. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Protection Board = AWM-091
    Before:
    [​IMG]

    After:
    [​IMG]

    [​IMG]

    Parts:
    [​IMG]
     
  9. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Power Amp Boards: AWH-48 (R) & (L)

    Before:
    [​IMG]
    [​IMG]

    After:

    [​IMG]
    [​IMG]
     
  10. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Output Transistors = Pulled Cleaned and Repasted
    [​IMG]

    [​IMG]
    [​IMG]

    [​IMG]
     
  11. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Main Filter Caps = The Big Boys

    [​IMG]
    [​IMG]
    [​IMG]
    2.2uf (Film Bypass Caps)
    [​IMG]
    [​IMG]
     

     

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  12. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    EQ Board = AWF-021

    Before:
    [​IMG]
    After:
    [​IMG]
    Parts:
    [​IMG]
     
  13. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    FM Board (Tuner) = AWE-068

    Before
    [​IMG]
    After
    [​IMG]

    Parts:
    [​IMG]
     
    Last edited: Jun 23, 2018
  14. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Wrap Up:
    [​IMG]
    [​IMG]

    [​IMG]

    [​IMG] [​IMG]

    [​IMG] [​IMG]
    [​IMG] [​IMG]
    [​IMG] [​IMG]
    [​IMG]

    1250 is now at home with the family.... she sounds as good as she looks. Thanks for Matt SD & Mark the Fixer for bones to my rebuild. I did change to WIMA Films & UKA 105c audio caps for the signal path. My BOM list is in XLS in early post. Very pleased with the result.

    SX-50 Series = Badass.

    Now time to line-out the next rebuild. Thanks for following.
     
  15. The Rebel

    The Rebel Active Member

    Messages:
    320
    Location:
    Deep South
    Excellent!! Congrats on a great score on the super nice 1250. I agree, SX-50 series = Badass. I am working on two of my own 1250s now. One has been recapped, and the other is virgin. This has been a really nice, clean, straight forward thread. I learn something from every one of these threads. I like the way you do things. Great pics of parts replaced too. Thanks for sharing.
     
  16. slipstream55

    slipstream55 Active Member

    Messages:
    236
    Location:
    Gilbert, Arizona
    Your output transistor rebuild is the first one I've seen in some time that didn't over-do the thermal paste on the transistors. Great job.
     

     

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  17. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    Someone posted less is more somewhere... I guess that kinda stuck. 1250 is a very special unit... I can’t say enough good things about how she responded to the rebuild.

    850 is a flat ass kicker... best 65 WPC. 750 blew me away after rebuild = wow. My rebuilt 1250 is an experience like the “Millennium Force” at Cedar Point. If you have riden, you know it’s hard to describe - sensory overload that leaves you smiling.
     
  18. zebulon1

    zebulon1 Building a new bench. Finally! Subscriber

    Messages:
    4,910
    Location:
    Las Vegas Nevada
    The 1250 is a fantastic set to rebuild. Pretty easy access makes for a fun restore.
    I finished a Mouser order for the works (Full Monty) on a SX-1050. $210.00. There are quite a few components. I would like to tryout the "KA" series but placed the order already. Maybe the next rebuild.
     
  19. Super Noob

    Super Noob AK Subscriber Subscriber

    Messages:
    217
    Location:
    Fort Myers, FL
    I really am pleased... along with WIMA films. I like 2.2 bypass caps on the mains.
     
  20. KingBubba

    KingBubba "Too Much Stuff" Subscriber

    Messages:
    9,991
    Location:
    Brooksville, Fl.
    I had talked with Matt before he did my 1250 and 1280 about adding bypass caps on the filter caps. He was not in favor at that time. SN can you post your reason for adding them to your project? Also can you express to us the sonic difference it creates?
     

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