Kenwood ka 4006 in for service

This Kenwood KA-4006 integrated amplifier well known for its tube like sound is in for service. Flagship model at 45 watts per channel. this amp was very easy to work on, schematic is decent and of course, it's beauty...
if you get your hands on one, she's a keeper...
#kenwoodka4006, #kenwoodka, #kenwoodka4006capacitors,

[@capriracer351]

That sequence that started at about 13:17. I was laughing with you, not at you. I've done this more times than I'd care to admit, even with a well magnetized screwdriver.

[@Sans_Solo_]

Love the Star Wars death star fly through!

[@dpaulku]

Your treatment of a Luxman M-02, which I own, and your production style and values kept me looking. Now you open another member of my small collection! Big props for the ultrasonic cleaning, too. Would you be willing to try and show us if it's possible to upgrade the speaker binding posts to something more current? Thanks.

[@yvileye]

Good work, beau travail Joe

[@ronbradshaw7404]

Just ONE of the toggle switches on this good old Kenny, would pay for the entire black plastic front panel of a modern piece-o-crap amp or receiver!.

[@transformateur9969]

Hello and thank you very much! ,I would have liked to see on the diagram in the service manual where you put the multimeter probes to take the bias voltage and adjust it

[@Justplast]

Very Good Job Joe A1 mate from Australia

[@TheC5corvette]

I went thru a couple KA-8006 its bigger brother , and mostly needed just some caps and resistors on power board. What i noticed that drove me crazy was the bias. After warm up for 50 min and then with lid off i adjusted bias to spec. Then i saw that with the lid put back on the bias would start a nose dive and drop about 14mv from spec.. And then when i remove lid the bias then would go back to about what i set it at with lid off. Drove me nuts for awhile and never confirmed why such a drop the second the lid was put back on. So i compromised the adjustment with lid off then rechecked it for correct mv with lid on. Now i have a Kenwood KR-8010 receiver which specs say 50mv and i see that it does the same thing. lid on i set to spec and i get a nose dive in the bias mv almost immediately after setting lid on

[@costela4200]

👍👍👍

[@JonPaul]

When you check caps in circuit like that for a "good\bad" determination, are you checking for shorts via continuity test? EDIT: you did say this in the video, sorry. Those small grey elna caps are suspect. Small orange are low leakage (I'm sure you know all this) but the values drift so much. LOL, I keep several magnets on my bench and I'll stick a magnet right to the screwdriver shaft for extra grip on those screws. Thanks for sharing your work.

[@DjMarkGuzman]

Nice Work Joe! You work very patiently.

[@VintageAudioFever]

Thanks 👍

[@shield-maiden]

what a nice amp and good video as always 🙂 by the way what is the name on thst spary you use for cleaning pots ? hugs from denmark 🙂

[@Roach2544]

Hi Joe from Montreal! Big Fan quick question, when you test the output, what voltage should be input , I know line level is about 1V, how do you know using your phone and not a signal generator?

[@darellhands1602]

Vn

[@bchdsailor]

Same aluminium knobs as Model 500-600-700