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harman kardon

  1. JB8

    HARMAN KARDON 330B - Roached Resistors, No Output!

    Here's what I know: Unit powers up, no sound, no output at all across all functions, no voltage at speaker terminals Inserted outside source into main amp in's, no sound Pulled the bottom cover to check some voltages, was getting roughly 54V DC at the test lug (B5) at what I'm assuming is tied...
    • JB8
    • Thread
    • 330b harman kardon harman kardon 330b resistor values resistor wattage
    • Replies: 5
    • Forum: Solid State
  2. FranzS.

    H/K Citation 16A blowing Channel B Fuse

    Hello, I just got gifted a Harman Kardon Citation 16A and the guy I got it from said it has been partly revised 4 or 5 years ago and then worked fine but one channel kept dropping out under load so he retired it. Now I plugged it in upon receiving it today (did a visual check for leaking caps...
    • FranzS.
    • Thread
    • citation citation 16a fuse blow harman kardon help
    • Replies: 2
    • Forum: Solid State
  3. David_NC

    HK 630 Receiver - FM Issues and Amp Adjustments

    I picked up this 630 Twin Powered receiver about a week ago, along with the Concept 4.5D pictured with it (not pictured is the non-functional 4.5D that was also included). The HK is in near mint condition cosmetically, other than needing a little cleaning. Functionally, it's also good, other...
  4. B

    Help with Harman Kardon PM 655 Vxi phono input?

    I am the original owner of a HK PM 655 Vxi. Love the amp. Recently no output at all from the phono input (I only use MM) I was using compressed air and gave a shot to the stylus; I think the amp was powered on but speakers were off, and the problem seems to have happened near that time, but I'm...
  5. JB8

    HARMAN KARDON 330A - Volume Pot Replacement?

    Hello! I have my first 330A on the bench after dabbling in B's and C's - very cool unit! That said, even after a thorough cleaning, I'm getting a bit of volume on the left channel with the control at zero. Once the volume is increased both channels are fine, no perceptible imbalance, and sound...
    • JB8
    • Thread
    • harman kardon harman kardon 330a potentiometer repair volume control
    • Replies: 2
    • Forum: Solid State
  6. ChicagoHiFi

    Harman Kardon 50+

    Hey everyone… I’m pretty new to the site and I’m looking for info on my Harman Kardon 50+. I bought this receiver for $100 locally in Chicago. It’s in really good condition and it sounds great. It’s also quad. But I can’t seem to find any info on it. There’s a hifi engine forum on it but that’s...
  7. 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
  8. rickl

    HK Citation Seventeen preamp

    I just got a Citation 17 and matching 16 on the bench. I didn't see many pics on AK so I thought members might like to see one example. if there is interest, I'll post a similar 16 thread once I look at it. this will be more of a picture thread than a restore thread. Owner said one channel...
    • rickl
    • Thread
    • 17 citation harman kardon
    • Replies: 10
    • Forum: Solid State
  9. richiem46

    Harman Kardon TA260 Restoration Begun

    I have seen several Harman Kardon TA260 receivers for sale and it looked like an interesting receiver. I was tempted to obtain one but didn't want to overspend on one as all my experience is with Fisher amps and receivers. I saw this one on the big auction site and the faceplate looked to be...
    • richiem46
    • Thread
    • harman kardon restoration ta-260 ta260
    • Replies: 14
    • Forum: Tube Audio
  10. D

    Harman Kardon A-30K (A-300) power supply

    Hi! I just picked up a Harman Kardon A-30K, the kit version of the A-300. It works but someone replaced the power transformer from a 110V primary to a 250V but in doing so he also replaced the doubler circuit with a classic half wave rectifier fed from a 250-0-250v secondary winding. Only...
    • depaj
    • Thread
    • a-300 a-30k harman kardon power supply power transformer
    • Replies: 62
    • Forum: Tube Audio
  11. A

    HK 330a, 430 Twin Powered

    Hi Everyone, hoping you can help. I’ve got an HK 330a and a 430 Twin Powered receiver and both have a channel that went silent. Before that they sounded beautifully. I’ve never opened up a receiver and switched out caps before, and I’m thinking it would be better to let a pro do it. (I’ve...
    • awat
    • Thread
    • 330a 430 twin powered harman kardon recap receiver
    • Replies: 7
    • Forum: Solid State
  12. OskarBas1

    Harman Kardon 630 Humm/Buzz

    My 640 is making a kinda anoying Humm/Buzz sound. When i experienced the same thing with my 330B i replaced the 2SC458 transistors with great results. So I'm wondering if there is any similar transistor in the 630 known for making these kind of noices and In that case what should I replace it...
    • OskarBas1
    • Thread
    • harman kardon harman kardon 330b harman kardon 630
    • Replies: 1
    • Forum: Solid State
  13. 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...
  14. F

    Harman Kardon hk 100m belt replacement help

    Greetings all, Sorry this is such a simple question, but I'm trying to get this done and I think i'm just about there! I picked up an hk 100m a few weeks ago. Great physical shape, but playback auto stops after a few seconds. Opened it up and poked around and eventually figured out the belt...
    • foofiebeast
    • Thread
    • belts cassette deck harman kardon repair
    • Replies: 3
    • Forum: DIY
  15. T

    Power amp for Jbl L65 Jubal

    Hi friends, for sure I'll do some errors (English is not my language), so I'll try to be schematic. Instruments: Jbl l65 Jubal, Sansui au 9500, Naim cd5si. No vinyl, no streaming. Music: I'm going to divide it into three groups. a: Pere Ubu, Captain Beefheart, Faust, This Heat, Dna, Public...
  16. xchg.ca

    Are any of these transistors have to be replaced? ( HK CD401 )

    Hi guys, this is a list of transistor I have in HK CD-401 deck It suffers from low record/playback level I have found and replaced leaked caps ( 10mFx16V and 1mFx50V ) I also found that 2x2SC2878(B) in rec-mute circuit were partially opened all the time regardless of button ( at the moment they...
    • xchg.ca
    • Thread
    • cd-401 cd401 harman kardon hk low level repair transistor
    • Replies: 6
    • Forum: DIY
  17. 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...
  18. icutfilm

    Harman Kardon AVR 55 No Sound?

    I was given this Harman Kardon AVR 55 but can't figure out why I am not getting any sound? I've tried all the functions, turned off surround mode, tried listening through headphone jack? All lights appear to function. Any suggestions?
    • icutfilm
    • Thread
    • avr 55 harman kardon no sound receiever
    • Replies: 19
    • Forum: Solid State
  19. 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
  20. 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
  21. Reyhifi

    Old tuner coming

    I was more or less looking for a vintage tuner, because I like the look. So I came across a harman kardon F500X that went a got for a song, is missing tubes and is going to be a project for sure but I'm up to the task. I have 50 % of the tubes here already. So I hope I can get it fired up next...
    • Reyhifi
    • Thread
    • f500x harman kardon hk tube tuner vintage tuners
    • Replies: 11
    • Forum: Tuners
  22. Bpscorn

    donated HK3370 with interesting issue

    SO as people often seem to do, I've been given a HK3370 Receiver to look at/dispose of./ It has the common power on, immediately switch off/protect error so common with these, BUT for one small difference. The mute button prevents the board from going into protect or shorting out. I've issued...
    • Bpscorn
    • Thread
    • diy fault harman kardon
    • Replies: 10
    • Forum: DIY
  23. SuperToaste7

    My Harman Kardon and two others stereo separates

    So my grandfather recently had to move and long story short, he gave me his Harman Kardon hk725 Pre Amp, Harman Kardon hk400xm cassette deck and a Harman Kardon HK 870 Stereo Amplifier. The other two pieces are a Marantz ND8006 and a Thorens TD 145 MKII. He had all the gear recently serviced and...
  24. MickP

    Harman Kardon Citation 16A

    Hi all hoping for some advice. I am currently working through my citation 16A power amp recap and refurbishment. I need to replace both Dual NPN differential pair transistors on the driver boards marked as Q1. They are marked with a part number SD3119724 might be Motorola. Can’t find an...
    • MickP
    • Thread
    • citation 16a harman kardon power amp
    • Replies: 5
    • Forum: Solid State
  25. 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
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