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  1. Tha fios agaibh

    Bonjour !

    Welcome Grégoire. Your Plc based home automation system sounds pretty cool. Do you use sensory inputs for feedback, or just buttons to select lighting schemes or for turning on/off devices? I look forward you seeing your comments and ideas. Regards, John
  2. Tha fios agaibh

    Denon AVR-1912 E2/EA

    It's a convenience thing. Personally, I'd rather look at a printed hard copy where you can rearrange pages or mark them up with notes. But yes, the electronic version has its advantages too. If your old computer is fit for the Smithsonian and difficult to read the file, don't worry about it...
  3. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Chrome is a Windows based operating system, so I would download the windows option. You just need Adobe acrobat reader as Dave mentioned.
  4. Tha fios agaibh

    Wiring volume pedal

    I would put a 470Ω resistor in-line (series) with each input line and a 20kΩ across (parallel) outputs A and B to couple the two signals. Leave everything else as it is.
  5. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Yes, We had a great time but it's good to be home. I must admit, It did suck to have to put on our winter coats when we got back. I use my phone to view the .pdf file and use the zoom feature (like bushtech mentioned). One big advantage of viewing the file electronically is that you can search...
  6. Tha fios agaibh

    Denon AVR-1912 E2/EA

    I do not know if you have some component that overloaded the circuit, or you accidentally shorted out the 5v? If you are ordering replacements, it'd be wise to order several extra fuses in case the overload is still present.
  7. Tha fios agaibh

    Denon AVR-1912 E2/EA

    F105, F106 is the origin of the +-5v rail on page 110
  8. Tha fios agaibh

    Denon AVR-1912 E2/EA

    You can often check esr values of electrolytic caps in circuit, but usually not diodes because the components connected to them. You can find shorted diodes in circuit, but usually not be able to read actual voltage drop (Vf) without unsoldering one leg of the diode first. I suggest you dont try...
  9. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Thanks Michael, we're having a great time in the warm weather. I guess down here "warm" means 95F (35c) Back home, we call that Hot. Yes, component can just short out out for no apparent reason, but from my limited experience, The components that usually lead to their demise are things like...
  10. Tha fios agaibh

    Denon AVR-1912 E2/EA

    They are duplicate cap numbers. For instance C513 is a electrolytic on page 106, But there's also a C513 ceramic cap on page 120. I wouldn't read too much into it, just use what the circuit diagram shows and use the parts list as a reference. Hard to say what caused your transistors to fail...
  11. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Hi folks, the green treemonster and wife has escaped the cold habitat to Mexico for a week. Michael, i see your progressing fine with some help from bushtech. I can't offer much help at the moment but keep tinkering and you will have more of those "ah ha" moments. I will pop in when i can to...
  12. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Great progress. You could, but I see no urgency with calibrating it right now. Besides, you'll likely have to recalibrate once you put humpty dumpty back together. Also, I wouldn't turn up the pot related to the missing transistors. Obviously, don't power up any transistor without its heat sink...
  13. Tha fios agaibh

    Denon AVR-1912 E2/EA

    .....And a 40% chance China post looses it. I would hold off ordering anything until you have a complete list of parts you need. (Shipping costs would be minimized)
  14. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Hey, great find!! I woud download data sheets and compare the missing transistor number(s) with the transistor specified on the print. Btw, HighB originates on page 108. It looks to be a 7v rail. Yay. Its exciting to find fried components! Well, that or I'm just a geek.
  15. Tha fios agaibh

    Denon AVR-1912 E2/EA

    You've already dug into the board so I wouldn't worry about that now. I haven't traced HighB to its source to find its voltage. It could be 7,5 or even 3.3v idk. Looking at Q463 gave me the impression it's looking for a negative voltage imbalance to send a Tr_Thermal fault. Even without Q463...
  16. Tha fios agaibh

    Denon AVR-1912 E2/EA

    I was suggesting you check HighB rail, but if you have everything torn apart.... we should either fish or cut bait. I highly suspect this portion of the circuit so you might as well get in there and start checking components.
  17. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Ok, It's known as "Super glue" over here.
  18. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Thought there was a multi channel mode? Neveryamind. I believe you should have all your test points regardless because all channels have the same rail. (HighB+/-)
  19. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Your 4 board transistors check out with the circuit. I suspect the 3 heat sink transistors are; the 2 Darlington Q464 and Q470, as well as Q469 used for their biasing. What should also be somewhere around there (on pcb) is Q463 that is to detect Tr_Thermal fault.
  20. Tha fios agaibh

    Denon AVR-1912 E2/EA

    Power rail to that portion of the circuit is "HighB". What voltage do you get +HighB to HighGnd? How about -HighB to HighGnd? I suspect + will be a bit high, and neg a bit low. Another words, Neg is being diverted to ground. And also suspect this portion of the circuit (SBL) as the cause...
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