Denon AVR 4800

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • shorteddiode
    Badcaps Veteran
    • Apr 2011
    • 221
    • USA

    #1

    Denon AVR 4800

    I am not getting sound from the Surrond A right side. Only have about .1 Ma output. Anyone else ever had this problem? This maybe a stupid question but I usely only work on tube stuff, so my signal tracer is an old NRI modell 33 tube signal tracer. Is it save to use on the Denon to trace the out put signals?
  • shorteddiode
    Badcaps Veteran
    • Apr 2011
    • 221
    • USA

    #2
    Re: Denon AVR 4800

    I did more checking and had no DC offset or resistance between the neg and pos speaker terminals. So I kinda discounted a bad transistor or IC chip. Once I opened it up and checking componets I found a bad solderoint at CX944. Now to put all back together and see what happens

    Comment

    Related Topics

    Collapse

    • DCJack
      B&K 707 tube tester. I need help.
      by DCJack
      Hi everyone!

      I managed to get my hands on a rough condition B&K 707 for "the best price" because it was not working. It's my first tube tester and I'm really wanting to get it up and running. I downloaded that manual that has the schematics and tested every resistor and capacitor and replaced the ones that failed. I replaced the missing 83 rectifier tube with a used but tested-good one. I also have a number 80 rectifier tube that I have used in tests before I found the 83 tube.

      Initially I noticed that I was not getting the red on-light to turn on, but it...
      03-05-2024, 05:05 PM
    • Schoenradt
      ECH81/6AJ8 Vacuum Tube Question
      by Schoenradt
      Recently I acquired an Eico HFT 92 AM/FM radio made back in 1958. The unit has had some decent modifications done such as replacing the rectifier tube with silicon diodes and replacing the main filter capacitor with electrolytic capacitors. When I powered it up FM wouldn't tune past 105Mhz. I checked the FM tuner front end assembly and found a capacitor not soldered to the coil from the Plate B+ to and ground on the other side of the coil. Some calibration was needed on the trimmer capacitor on the tuner. My question is AM is extremely weak. When I tap on the tube I get all kinds of snapping and...
      06-10-2021, 05:49 PM
    • Green Probe
      Recapping a Denon AVR X6400h SMPS
      by Green Probe
      (TLDR: It was capacitor C6519 [Koshin KZH 50V22uF] and C6515 [Koshin KZH 25V47uF] on the power supply. I have questions at the end)
      Disclaimer: I'm an amateur hobbyist and will get things wrong.
      Always use caution when working around mains power and high voltage capacitors!

      Hey guys, I'm repairing a Denon AVR X6400h for my brother. It quit powering on after a power outage. It acted like this last time there was an outage, but after letting it sit overnight it started working again for a few years. This time letting it sit did not bring it back.
      SYMPTOMS:
      -No display...
      Yesterday, 03:36 PM
    • SevenOFF
      Denon AVR-X4000 – Fast red blinking after 2nd relay
      by SevenOFF
      Hi everyone,

      I’m working on a Denon AVR-X4000 that goes into protection mode (fast red blinking LED) shortly after the second relay click.

      According to the service manual, a fast red blinking LED indicates a DC detection (DC_DET) or ASO (abnormal current) fault, meaning the unit is detecting a potentially dangerous condition on the power amp or power supply side.

      Here’s what I’ve done so far:
      • Fully opened and cleaned the unit (a lot of dust inside)
      • Removed and visually inspected the AMP board → nothing visibly damaged or burned
      • Testing is done with
      ...
      06-18-2025, 09:54 PM
    • FuzzyOwl
      Denon AVR-X3600H No sound even to pre outs in direct analog mode. Help please!
      by FuzzyOwl
      Hi, I have a Denon AVR-X3600H I'm trying to repair. I have no electronics repair experience but I have a multimeter, service manual and a will to fix it (https://device.report/m/d5de8c00e617...f63147aba9.pdf)

      Everything seems to work except for no sound even through the pre outs. However I will get sound using Zone 2 pre outs.

      Only digital symptom I can tell is it will soft lock when in the Speakers/Test Tone menu and be unable to adjust +/- db during the test tone.

      I've followed the trouble shooting guide, audio check...
      12-05-2024, 11:54 AM
    • Loading...
    • No more items.
    Working...