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2270

  1. rustyhusky

    Marantz 2270 unstable DC Offset causes?

    Well, I almost got through my second rebuild without tapping the AudioKarma brain trust, but I'm having an issue with the DC offset on the right channel P750 power amp board of my cousin's 2270 (S/N 53625). Without going into too much detail, this unit initially required a new power switch and...
  2. V

    Marantz 2270 project vs reconditioned?

    Looks like an average restoration is around $300 for a working unit w/o critical issues. I see restored units from $700-$1500. I have my eye on an unrestored listed for $300 locally so no shipping or taxes. Better to get a working unit with unknown issues and have it restored or buy one...
  3. jFF_Bulbo

    Marantz 2270. Low bias.

    Hello AK'ers. I retored my 2270. SN 38510. BASES ON THE SUPER POST from @Leestereo and recently @Super Noob . All is fine except LEFT amplifier ( P750, LEFT) After all the new parts installed, BIAS is about 2.1-2.3 mV, i know it should be 10mV. I changed diff transistors, pre drivers...
  4. dragnalus

    Realtek ALC1150 vs DAC... to buy or not to buy.

    hi gang - I'm looking for ways to improve my listening experience and was considering adding a DAC instead of using my computer's onboard sound. The onboard sound is the Realtek ALC1150 chipset. I use the line out (1/8" jack) and via an adapter plug into the auxillery RCA inputs of my...
    • dragnalus
    • Thread
    • 2270 dac realtek alc1150
    • Replies: 15
    • Forum: DACs
  5. Bluefisheye

    Marantz 2270 restored

    After few weeks, I just finished to restore my Marantz 2270. I recapped all capacities, replaced several transistors, diodes, blue switch, speaker relay and relamp all bulbs, lamps. At the end, I had a problem with popping crackles in the right amp board and without the volume potentiometer...
    • Bluefisheye
    • Thread
    • 2270 crackles marantz popping noise recap restoration
    • Replies: 12
    • Forum: Marantz Audio
  6. rustyhusky

    2270 power amplifier boards R & R

    Ok, I admit it. I'm a glutton for punishment. After rebuilding a 2265B, I'm taking on my cousins 2270. The first thing I've noticed is that the older 2270 is much less service-friendly than the 2265B. Getting the two power amp board/heatsink assemblies out is nothing short of a $@&%!!! A...
  7. Super Noob

    Project: Marantz 2270

    https://drive.google.com/file/d/16I55F1d64iaTnUjbR8JLqRBnqPeWSp2d/view?usp=sharing (build details - list) Completed this rebuild a few months back... just getting around to sharing the process (before I am too far away from it). Not the easiest unit I have rebuilt / restored for sure. Not...
    • Super Noob
    • Thread
    • 2270 cap list marantz marantz 2270 rebuild recap recap list
    • Replies: 28
    • Forum: Marantz Audio
  8. jFF_Bulbo

    Marantz 2270 recap Help

    Hello AK'ers. I hace a 2270 Unit .recently serviced. Many new pieces. I like to recap preamplifier section, so, according to the post of LEESTEREO about, I got some MKP capacitors With the same values that the actual capacitors instaled. I used the user's manual part list. I'd like...
  9. jFF_Bulbo

    Marantz 2270 with FM problem.

    Hello. I have a 2270 receiver and al is working well, it was serviced 1 year ago, but FM sounds very very low, any idea about how to fix it? am works fine, fm ca be sintonized but it is almos unaudible...... Thank in advance!!
  10. Mike Sweeney

    Bias transistor revisited

    I read with interest this thread - http://audiokarma.org/forums/index.php?threads/solution-for-2270-high-bias-early-serial-number.770102/page-2#post-10572328 And I liked it well enough to go back to my two boards and redo the two transistors I had just soldered in last night :) But I made a...
  11. Baisao

    2270 Refurb in Austin?

    I have a 2270 that's in good condition— all features work and the unit sounds great— but will probably need a refurb considering the age. It has been around humidity as there are small spots of rust on the faceplate screws. I’ve heard shipping horror stories so I would like to get it worked on...
  12. M

    2270 transformer testing

    Hey All, I began recapping my 2270 this week and ran into some trouble. This is my first time doing this. First I did the power supply, reassembled and everything was working great. Next, I replaced the power switch and tested, again, no problem. Then I did three caps on each P750 board, but...
  13. T

    Marantz 2270 FM out

    Hello, I have a Marantz 2270, and I am having a problem with FM receiving. Can anyone help? Here's what's going on: The tuning wheel appears to have come loose. I spin the wheel from the far right (higher numbered channels) and there is no movement of the tuning indicator for a while. With a...
    • tfri513
    • Thread
    • 2270 marantz receiver receiver advice
    • Replies: 10
    • Forum: Marantz Audio
  14. nickdinatale

    Marantz 2270 repair issues

    Hey everyone! So I've had a Marantz 2270 on my bench over the course of the past few weeks. I've recapped all of the boards aside from the AM and FM boards (everything was working okay following the recap), and I replaced a bad transistor as well. After adjusting voltage, DC offset, and idle...
  15. Leestereo

    Leestereo's Restoration and Upgrade Of A Marantz 2270

    A nice 2270 was on the bench for restoration/upgrade of the power supply, preamplifier, power amplifier and phono stages. Main Power Capacitors The original Elna 9,000µF/55V capacitors were replaced with Kemet 15,000µF/63V capacitors. Note that the original capacitors measured ~11,800µF at...
  16. L

    Best ways to get a Marantz 2270 and prices?

    I REALLY REALLY want a 2270 - they are so distinctive and if I can find one with the right price, it would make a perfect addition as the cornerstone of my new vinyl setup. I already comb craigslist and eBay regularly but want other strategies. What yard sales should I be looking for to find...
    • Lucas G
    • Thread
    • 2270 70w craigslist ebay hifi marantz reciever serviced
    • Replies: 10
    • Forum: Dollars and Sense
  17. L

    Marantz 2270 with no top plate for $400?

    On my local craigslist, there is a posting with a Marantz 2270 for $400. It work so and has a wooden case but has no top case. This is what it looks like: https://images.craigslist.org/00W0W_lM5OtG6xmY_600x450.jpg The wooden case is banged up too. Do you guys think this indicates bad...
  18. Dubestar

    Marantz 170 DC Amp has no power on/off how do you properly manage connecting to power?

    Hello, I recently purchased a Marantz 170 DC Amp and have it paired with Marantz 2270 as the preamp. There is no power on/off button on the Amp. The manual says to plug it into the switched AC plug in the back of the Pre Amp (2270) - That works fine, except when I go to turn off the 2270 there...
    • Dubestar
    • Thread
    • 170dc 2270 amp marantz marantz 2270 marantz 2270 as preamp marantz amp popping sound preamp
    • Replies: 3
    • Forum: Marantz Audio
  19. M

    Marantz 2270 Needs TLC

    I live in Charlotte, NC and have a Marantz 2270 that needs to be refurbished. Who in the area would you trust to do it? I've been waiting for 9 month with Blueglow Electronics, however, they are not taking any new repairs. I'm willing to drive 200 miles for quality service. Thanks for your...
  20. MBuras

    Marantz 2270 late model factory modifications

    I was recently working on a Marantz 2270 that is very late production, from October 4th, 1975. Serial number is #U462378. We all know there were a few service bulletins issued on this model but I've never seen pics of the mods. First up is service bulletin one which changes the temperature...
    • MBuras
    • Thread
    • 2270 flyback marantz service bulletin
    • Replies: 5
    • Forum: Marantz Audio
  21. grailseeker

    Marantz WC-22 Mesh Screen Template

    Hello, I am the proud owner of a Marantz 2270 with wood case/cabinet WC-22, however, I am missing the mesh screen that goes with it. I would really like to do right by this lovely piece of equipment and replace the screen but have had no luck finding one locally or online. Does anyone know...
  22. sssboa

    Yamaha CR-1000 vs Marantz 2270 CR-xx00 vs 22xx

    I know people are saying Marantz sounds warmer, but I have Yamaha CR-1000 and it is quite warm comparing to modern gear or Yamaha CA-1010 that I also have. I am thinking about buying Marantz 2270 but maybe I can achieve the same sound just playing with the loudness slider of Yamaha CR-1000? I...
    • sssboa
    • Thread
    • 2270 cr-1000 marantz vintage yamaha
    • Replies: 11
    • Forum: Yamaha
  23. fredb44118

    Recapping Marantz 2270... can I use non-polarized main filter caps?

    Hi everyone. One of the main power supply filter capacitors of my 2270 was leaking and causing sound issues, so I've decided to replace both of them. It's probably way overdue. So I ordered two Mundorf MLytic 10000uf/63VDC caps (http://www.partsconnexion.com/capacitor_ele_mundorf_plugin.html)...
    • fredb44118
    • Thread
    • 2270 capacitor marantz mundorf capacitor polarity recap recap power filter
    • Replies: 8
    • Forum: Marantz Audio
  24. J

    Marantz 2270 light bulb issue

    Test
  25. NazcaRecords

    Marantz 2270 P700 Phono Board Parts List

    Hello everyone, I'm trying to do an overhaul on my 2270 phono board P700. Does anybody have the part list from Mouser.com. I don't need every single component just the main basic ones. Thank you
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