Kenwood model 11 recap

Discussion in 'Kenwood-Trio/Kensonic-Accuphase' started by Oscar23, Oct 2, 2017.

  1. Oscar23

    Oscar23 AK Subscriber Subscriber

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    I found this smelly Kenwood model 11. No cord, timer broken, lights dead FM output very low, volume pot siezed beyond repair, missing knobs and quite frankly very smelly ( this must have smoked two packs a day). Put a cord on it bypassed the timer and we had power and sound (very muddy sound)
     

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  2. Oscar23

    Oscar23 AK Subscriber Subscriber

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    I started with the power supply. Very cooked. Replaced caps, qk1(2sc1419 with bd239),rk4,rk6, and dk3. Looks much better now. All voltages are now up to spec on to the amp. Tons of glue on this thing to.
     

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  3. Oscar23

    Oscar23 AK Subscriber Subscriber

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    I did the amp board today changed all caps and putting new trim pots in. Passed the dbt. Scrapped all glue off the board.
     

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  4. rjsalvi

    rjsalvi Active Member

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    Forward progress is always a motivator. Keep goin'! ...and if you have time, take a step back and have closer look (read: measure) at R1, 2, 3 & 5 on the PS board. Carbon composition resistors have a tendency to get quite a bit out of spec over time and heat. Otherwise, carry on. :thumbsup:
     
  5. Oscar23

    Oscar23 AK Subscriber Subscriber

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    I took your advice and measured them they were out of spec like you said replaced all of them
     
  6. Oscar23

    Oscar23 AK Subscriber Subscriber

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    The pre amp board was and adventure to get to has to remove the whole front part of the chassie. Quite the mess speaker selector board and switch board left hanging. Removed the volume pot.
     

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  7. Oscar23

    Oscar23 AK Subscriber Subscriber

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    Tried again to get the volume pot to turn on its own no such luck. It was seized sold. Repaired the seized timer. Opened it up and added 3 in 1 oil and moved it slowly now turns freely. No to just fix the shaft.
     
  8. rjsalvi

    rjsalvi Active Member

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    Those red "tear drop" shaped caps on the preamp board are tantalum...film cap replacements might make a worthy upgrade. Lookin good!
     
  9. Oscar23

    Oscar23 AK Subscriber Subscriber

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  10. rjsalvi

    rjsalvi Active Member

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  11. Oscar23

    Oscar23 AK Subscriber Subscriber

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    Dijjikey does not have any 3.3 uf 10v I can 3.3uf 450 VDC
     
  12. rjsalvi

    rjsalvi Active Member

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    Use the next voltage size higher than 10V that's available...16V, 25V, 35V, 50V?
     
  13. Oscar23

    Oscar23 AK Subscriber Subscriber

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    50 v is the next up
     
  14. Oscar23

    Oscar23 AK Subscriber Subscriber

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    I have to wait for my volume pot to arrive I ordered a replacement so I took the time to clean the faceplace and all the boards while I had access to them.scrubbed all that nicotine off
     

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  15. rjsalvi

    rjsalvi Active Member

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    Those will work fine.
     
  16. Oscar23

    Oscar23 AK Subscriber Subscriber

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    I replaced all the tantalums. Put my volume pot in cleaned it all up and put the model 11 back together. Everything works and sounds great. Except there is no lights and there is a pop when I turn it on.
     
  17. rjsalvi

    rjsalvi Active Member

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    Which version of the Model 11?
    Lights: No lights at all, or just the dial lights?
    Pop: What's the DC offset at the speaker terminals?
     
  18. Oscar23

    Oscar23 AK Subscriber Subscriber

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    Its the model 1 there is no lights at all. I had 0 MV at the terminal
     
  19. rjsalvi

    rjsalvi Active Member

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    Are your fuses intact?
     
  20. Oscar23

    Oscar23 AK Subscriber Subscriber

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    All the fuses are good. I think it is in the power supply. Going to pull the diodes and test them again. As for the pop not sure yet about that one I thought DC first to but none to set I going to recheck the amp and see if there is a loose cap or something.
     

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