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harman kardon 430

  1. Testacorsa

    Happy new owner of a HK430 with - with a weak phono input (please help).

    Hi all, I'm new here, so hello and happy new year from Denmark :) I hope you can help me with a weak phono input problem, but first let me tell you about my new receiver. A couple of days before christmas I got lucky, and picked up an early present from my local recycling centre, a Harman...
    • Testacorsa
    • Thread
    • distorted channel harman kardon 430 hk 430 phono input weak input
    • Replies: 13
    • Forum: Solid State
  2. A

    Restoring the lights on a Harman Kardon HK 430.

    Hello, This is my first post here. I've bought an otherwise pristine HK 430 off ebay here in Europe (Belgium to be specific). As mentioned by the seller, not all of the front panel lights work on my unit (attached photo). I've been looking at kits to replace the lamps on this unit and have so...
    • aamwgm
    • Thread
    • harman kardon 430 repair advice
    • Replies: 3
    • Forum: Solid State
  3. JB8

    HARMAN KARDON 430 - Oscillating DC Voltage At Speaker Terminal

    Hey All, I've read several threads on this issue, feels like I've checked most of the viable culprits but I need some help, please. ISSUE: Wildly fluctuating DC voltage at left speaker terminal, both spkrs 1 & 2 With DMM in 600 range, out of necessity, the voltage is quickly bouncing around...
    • JB8
    • Thread
    • 430 dc voltage dc voltage on output harman kardon harman kardon 430 speaker terminal transistor replacement
    • Replies: 6
    • Forum: Solid State
  4. JB8

    Harman Kardon 430 - Left Channel Noise

    Squad, I have a 430 presenting very low level noise at start up on left channel only, right channel is silent. Noise sounds like a freshly poured Dr. Pepper fizzing down, not loud, not pop corny, just steady noise. Assumed issue was power supply as its present at no volume and across all...
    • JB8
    • Thread
    • channel noise harman kardon 430
    • Replies: 73
    • Forum: Solid State
  5. jpreza

    Harman Kardon 430 woes continue

    Good evening everyone, After resoldering all the joints on the amp board, I rechecked the voltages on the replaced transistors to make sure the solder is good. Most of the voltages read between 450mV and 550mV. After turning it on, the audio is worse than ever. A loud humming sound coming...
  6. jpreza

    Recommendations on digital amplifier replacement for HK430 receiver

    Good morning everyone, After a couple of months tinkering with a HK430 that has a blown Left Channel output, I'm thinking that perhaps the best route would be to replace the existing amp board with a class D digital amplifier and be done with it. Has anyone tried such a project? I'd be curious...
  7. K

    HK 430 pulsing idle bias (oscillation?) Harman Kardon 430

    I’ve got an HK 430 on the bench that is acting strange with a pulsing idle when powered up. It came in with a bad left channel with a bad Q416, burned R424 and one output was not clamped down and may have overheated due to a missing bolt. Strange. Replaced the bad parts and two outputs. I...
    • kmatch
    • Thread
    • harman kardon harman kardon 430
    • Replies: 19
    • Forum: Solid State
  8. LocalGiraffe

    Harman Kardon 430 vs. 75+?

    Hello, Am currently in the market for a HK-430 or a 75+ but was wondering on the differences between the two other than the 75+ having a quad setup. Couldn't find much info regarding it. If anyone has experience with the two (and perhaps the HK-730 as well) I'd love to hear from you.
    • LocalGiraffe
    • Thread
    • harman kardon harman kardon 430 harman kardon 730 harman kardon 75+
    • Replies: 1
    • Forum: Solid State
  9. dlucy

    dlucy's guide to Harman Kardon Twin Powered series 430, 630, 730 and 930 ... and Montgomery Ward 450

    The fourth era of Harman Kardon's solid state stereo receivers were the Twin Powered series: This thread is a guide to those models, their specs, and pointers to schematics and restoration threads for each. Note: If you have additional information on any of these models or have a great...
    • dlucy
    • Thread
    • 430 630 730 930 harman kardon harman kardon 430 harman kardon 630 harman kardon 730 harman kardon 930 hk
    • Replies: 24
    • Forum: Solid State
  10. K

    Harman Kardon 430 powers up but no sound

    Hello all! I have had a Harman Kardon 430 for a few years but recently have completely lost all sound. When I power it up, all the lights turn on and even the dial and stereo lights are active when moving through FM. However I'm not getting any sound through speakers or from headphones. I...
  11. audiodogster

    Made the Klipschorn upgrade but feel I don't have worthy equipment

    Hello all, I am a proud owner of some 1989 Klipschorns. I have Fortes and used to have La Scala Industrial. I love the Forte, wasn't as enthusiastic about the La Scala but they were bone stock with original 1988 crossovers. Forte I recapped but haven't gotten around to changing to Crites...
  12. M

    Tuner on Harman Kardon HK430 silent

    Hello, I am looking for some technical help from a good soul. I posted this thread a few months ago but no visitor seemed to have enough knowledge of tuner electronics; therefore this new attempt. FM reception on my HK 430 receiver stopped working after a couple months of perfectly fine...
    • mqtthiqs
    • Thread
    • harman harman kardon harman kardon 430 hk hk 430 troubleshoot troubleshooting tuner
    • Replies: 10
    • Forum: Tuners
  13. MrCreosote

    Harman Kardon AVR 430 No Output & Other Weirdnesses

    Unit has been used daily w/o problems. Unit not used for 2 weeks but left powered on (see "5 years ago" in Symptoms - didn't want to disturb it.) Unit then malfunctioned as follows: Symptoms: No speaker output Tuning dial blue light is out When remote is set to AVR, must press AVR again to...
  14. M

    Noisey channel HK430

    Hi all, I am looking for a little advice on a problem I am having with a recent HK430 purchase. The unit was in good condition and when I opened it up the insides also looked in good condition with the correct fuses etc. All bulbs were also all working. After cleaning the pots with some DeOxit...
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