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p800

  1. S

    Marantz 2230 Power Supply P800 transistor H2 hot to the touch - normal?

    [Edit: It's the H802 transistor, but I can't edit the title of the thread] Hi, I am in the process of cleaning up and recapping a Marantz 2230 that has been in the family for over 50 years. I had a relamp kit I bought in 2020 still laying around, and decided to go all-in and do a full restore...
    • sschaper
    • Thread
    • 2230 hot marantz p800 recap recap and restoration restoration transistor voltage readings
    • Replies: 3
    • Forum: Marantz Audio
  2. D

    2245 p800 problems

    Aloha AK, I was 96% done with a full recap of my 2245 with no problems. Phono board, preamp, and both power boards all done with no shorts on DBT, audio in both channels. I adjusted the idle current and DC offset on both boards just fine. I got to the main power p800 board, recapped it, good on...
  3. ton4eff

    Marantz 2265, 2275, 2250B... P800 Power Supply/Protection PCB Replica

    I decided to recreate this PCB. Most probably they use this one in other Marantz models, that I'm not aware of... In the first place, I made a clean copy of the schematic (with the vintage look preserved, of course ;)): Then, when I was working with the PCB, decided to add an option for...
  4. 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: 81
    • Forum: Marantz Audio
  5. drmazzei

    P800 rebuild problem

    I am rebuilding the P800 power board for my Marantz2275. I have replaced C801-802, C804-809 with new UPW electrolytics. I have replaced R-807, R-815, R-816, and R-817. H-808 and H-811 replaced with MUR1620. H-801 and H-804 replaced with KSC2073TU. H-802, H-803, H-805, H-806, and H-807...
  6. jd3rdcoast

    4270 - P800 P/S: No 35V or 14V DC post rebuild...

    HI all, hoping can get some direction on this power supply issue that I'm not getting DC voltage out of after rebuilding. Stated problem from my collector buddy: "was playing a record at low volume, it ended and he was not in room for for 30 minutes when he heard a pop in speakers. Ran into...
  7. runningdog

    Replace 150 ohm 5w resistor on 2230 power supply

    The square ceramic 150 ohm 5w resistor on a 2230 power supply can scorch the C804 electrolytic capacitor and the wire running to the collector of the outboard transistor. It is squeezed in-between these two items (this does not apply to the units that have the resistor mounted underneath). Is...
  8. Aaron99

    Marantz 2238 won't power on.

    New to the forum. I just acquired a Marantz 2238 in decent cosmetic shape from a seller on CL. The seller told me that when he presses power button a few seconds later he hears a click and then nothing. The unit passed a DBT and then I plugged it in and powered on. Within 2 or 3 seconds...
    • Aaron99
    • Thread
    • 2238 marantz p800 power supply zener diode
    • Replies: 70
    • Forum: Marantz Audio
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