• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

p700

  1. T

    4230 P700 issue comparing to service manual

    Help is needed here. I have been restoring the first board to some point, but noticed from the start that there is something wrong In my board. There was a blown resistor R772 in the bottom right that doesn't show in the manual. And my service instructions advice me to change diods H718 and H719...
  2. OFrank

    Marantz 2325 P700 H706/707 Replacement

    I have a Marantz 2325 for which I am replacing H706 and H707. I have read some posts and seen some pictures of the need to cross two legs of the replacement transistors. I have accomplished this with H707 (replacement KSC3503) but as I look at the data sheet for the original H706 (2SA818) and...
  3. J

    Marantz 2215B Power Supply Transistor Subs

    Hi all, I am currently restoring a Marantz 2215b as my first restoration. I am working on the power amp and I am having trouble sourcing a suitable replacement transistor for H709 and H710. The originals were 2SA684 which folks have said to substitute with KSA1220AY. However KSA1220AY is out of...
    • J85t
    • Thread
    • 2215b 2sa684 ksa1220 main amplifier marantz obsolete p700 restoration substitute transistor
    • Replies: 9
    • Forum: Marantz Audio
  4. ocdecio

    Marantz 4300 P700 small signal transistors

    Just leaving this info here for reference. I have a very original 4300 on the bench and as I am going through the left P700 power amp I am seeing a couple of discrepancies with the SM that may be helpful in subbing some small signal transistors. H717 to H720 - SM 2SC945 Board: 2SC735 - sub...
  5. richardg0n

    Marantz 2325 Right Channel Troubleshooting

    Greetings AK Members, Working on a 2325 restoration/recap and asking for your guidance. I have rebuilt/recapped the power supply P800, PE01 Pre amp, P400 Phono amp, PU01 Multipath, and PH01 Buffer amp board. I have restored several 2325s, and this is the first time I am experiencing an issue...
  6. Childof60

    2265B P700 Printed Circuit Board Clone - Any Experience?

    I found a 2265B a couple of years ago in excellent cosmetic condition. Unfortunately it had been a victim of lightening that took out the power supply and P700 amplifier. While I was able to repair the power supply tlhe P700 board is beyond repair assume of the traces were blown off as well...
  7. richiem46

    Marantz 2275 P700 Component Selection Affecting Bias Setting

    I read a number of threads about bias issues with the P700 amp boards in the Marantz 2275 and in other Marantz units. A lot of great information freely shared by other members. I came away not completely clear on the best approach to restoring the P700 board and thought I would start another...
  8. richiem46

    Marantz 2275 P700 Diode Questions

    I am in the process of restoring a Marantz 2275 and I noticed that on the P700 amp boards there are two red/green "diodes" installed across J703 and J709 and J704 and J707. Two other 2275's I restored did not have these "diodes". I looked online at various pictures of the P700 and yes, some...
  9. jFF_Bulbo

    2330b help!

    hello AK'ers I´m working on a 2330b. previously repaired without succes. power supply recapped, new transistors, new relay, single diodes an double diodes as well preamp, phono recapped power amp recaped BUT after changed capacitors, transitors, new mj´s 95/96 output.... one chanlles refuses...
    • jFF_Bulbo
    • Thread
    • 2330b dc offset help p700 q710 repir restoration upgrade
    • Replies: 10
    • Forum: Marantz Audio
  10. P

    Marantz 2275 - Right Channel P700 rebuild question

    Howdy folks and happy new year!! I’m working my way through my first 2275 rebuild (thanks for all the prior documentation!) and have come across a stumper. My amp has been working fine for a while and I’m stumped to fine the H704 transistor mis-wired. The traces seem to match the printed board...
  11. bitomaxsp

    Marantz 2275 rebuild

    I am rebuilding my 2275. It was in a bit of tired shape i'd say. But when i disassembled it it was more that tired. I guess everyone is aware what is on the picture. I am make 3D model now to 3D print this lamp holder. Once i'll validate that model is ok in reality i'll make it public so...
    • bitomaxsp
    • Thread
    • 2275 marantz marantz 2275 p700 p800 pcb pe01 rebuild replica tutorial
    • Replies: 80
    • Forum: Marantz Audio
  12. B

    Marantz 2275 - Right P700 issue

    I picked up a 2275 from an antiques guy last spring for a good price. It'd never been restored but still powered up and sounded okay. I upgraded the lights and cleaned all the pots first thing and had a beautiful summer and fall blasting records. The right channel would drop out at really low...
  13. Jermy69

    Marantz 2220B problem.

    I recently started a rebuild of my Marantz 2220B. While i have experience working with & soldering circuit board, this is my first rebuild on an old receiver. The only problem I have seems to be a tough one...no one else can figure it out or even give me any useful ideas what it could be. The...
  14. M

    Marantz Output Transistors

    I am trying to replace bad output transistors (2SD313D & 2SB507D) on a Marantz 2215b. I read previous threads that recommend MJE15030 (NPN) & MJE15031 (PNP). Since these are no longer available, I was hoping the MJE15030G & MJE15031G transistors would be suitable replacements...
  15. JLS

    2275: broken J708 wire on P700 board

    Just picked up a 2275 and am in the process of recapping (first attempt) and while working on the P700 power amp board the white wire that connects to the J708 pin snapped off. I removed the remaining wound up wire. Before I noticed it after my recap, I was testing and there was no output. Now...
    • JLS
    • Thread
    • j708 marantz 2275 marantz 2275 troubleshooting p700 static noise
    • Replies: 23
    • Forum: Marantz Audio
  16. slayer44

    Marantz 4230 Transistor list anyone?

    Greetings!...has anyone recently rebuilt the amp boards in the 4230?...I was wondering if anyone had a spreadsheet handy to order from. I have a TON of Fairchild semiconductors and would prefer to use those, but if others are preferred, I'll use those. Thanks in advance.
  17. Mike Sweeney

    2245 Pre Amp P700 board

    Every board in this unit has been a challenge at some level :) I think the Karma gods are making up for the last one which was a cake walk. This has blown caps, lift traces, odd transistors with no marks swapped in and then I just found a resistor buried behind on the big ugly caps broken in...
  18. 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
  19. Rezistor

    Removing 4230 P700 amplifier board - how to?

    I have done some basic tube amp repair, but.... Removing this p700 from the 4230 looks a bit intimidating. I need to replace the 3W 47ohm R759, 760, 761 and 762. Do I cut the jumpers from the circuit board to the heat sink to allow removal or is there a better way? Thanks in advance!
  20. ton4eff

    Marantz 1030/1060 P700 Board Replica

    Hi, I bought this Marantz 1060 "in perfectly working condition" ;) recently. Don't ask for the price I paid :eek:. What I saw inside however, was a P700 board devastated by some “criminal” and a baked transformer (you know the smell). As you can see from the pictures, there are lots of burnt...
    • ton4eff
    • Thread
    • marantz 1030 marantz 1060 marantz 2215 marantz 2220 marantz 2230 p700 yd2821007-2
    • Replies: 53
    • Forum: Marantz Audio
Back
Top Bottom