Marantz Service Manual error thread

Discussion in 'Marantz Audio' started by Jailtime, Jun 16, 2011.

  1. tulkas

    tulkas New Member

    Messages:
    15
    2235 (not B) SM Errors

    I found the following while recapping a 2235 (not B):

    2235 SM Capacitor errors:

    C307 listed as standard 0.47 uF/50v. Use non-polar caps here.
    C308 & C309 listed as standard 0.22 uF/50v. Use non-polar caps here.


    CE21 & CE22 listed as 33 uF/50v. Should be 3.3 uf/50v.
    CE23 & CE24 listed as standard 1.0 uF/50V. Use non-polar caps here.

    Note: The non-polar capacitors are shown correctly in component diagram, just not listed as non-polar in parts list.
     
  2. AudioPuppet

    AudioPuppet AudioPuppet

    2225 Bias adjustment correction

    2225 Idle current adjust:

    SM says measure J712 - 718 for one channel, 713 to 719 for the other. Proper measuring points for forward bias are at J714 to 716 and adjust R733 for 20mVDC on that channel. Then measure J715 to 717 and adjust R734 for 20mV on the other channel ... This is the same mistake as the 2220B SM

    Restoring a 2225 for my buddy and discovered this like , 30 mins ago ..:thmbsp:
    BTW , 2225 sounds awesome restored .. Ya got one . DO IT !!

    FWIW .. A friend of mine father was a Marantz tech and I was told that Marantz made mistakes in the SM on purpose to keep hacks from working on them .... ( Like me ?!?! :D )

    Peace
     
  3. trikster

    trikster Well-Known Member

    Messages:
    564
    What an invaluable resource. Any ideas if the 2015 SM is good to go? I am embarking on a restoration and hope to have a trouble free experience (well, at least from the SM point of view).
     
  4. blhagstrom

    blhagstrom Mad Scientist, fixer. Subscriber

    Messages:
    11,500
    Location:
    Duvall, Washington
    Marantz 2275, phono board, C413 is labeled wrong on the board and in the service manual. Negative goes towards the closest end of the board.

    If you get it wrong H434 (100 ohm resistor) turns into a heater and will smoke.

    Oh and SM shows J707 and J708 used for idle current, Jailtime said to use J701 and J702, but there are no J701 and J702 on the amp I have on the bench. The SM I am looking at had J703 and J704 penciled in and those I have and those I used. They connect across the large emitter resistors.
     
    Last edited: Jul 30, 2014
    thxdave likes this.
  5. invalidbuffa

    invalidbuffa Audio tinkerer

    Messages:
    1,171
    Location:
    Oregon
    2275-

    Tuner stringing diagram shows cord wrapped the wrong way around the tuning capacitor pulley. The cord should enter and exit at the top of the wheel.
     
    thxdave likes this.
  6. blhagstrom

    blhagstrom Mad Scientist, fixer. Subscriber

    Messages:
    11,500
    Location:
    Duvall, Washington
    Marantz 2130

    On the buffer amp and mode switch board, PT00.

    Capacitors CT08 and CT07 are labeled backward on the board and on the image of the board in the service manual. The schematic of the board is correct.
     
  7. chalisload

    chalisload New Member

    Messages:
    3
    JailTime , just so you know there are errors in info posted on your Marantz Service Manual Error thread, posted on " June 2008 " I just tried measuring the idle current on a Marantz 2245 based on the test points in your thread and I actually measured the rail voltages.

    To avoid taking apart the unit I used a different method to measure idle current . Where did you get your info / post from ?
     
  8. rBuckner

    rBuckner Luv 2 Restore Subscriber

    Messages:
    8,774
    Location:
    Prescott, Arizona
    You sure you had J754 and J760? Looks right to me. A power off ohms check between those two points should read 0.4 ohms.
     
  9. JURB

    JURB Super Member

    Messages:
    3,343
    Location:
    NE Ohio
    The print for the 1180DC is screwed up at the output section. The way it is drawn it is a smoke machine. What's more the mistakes are not the same in both channels.
     
  10. George16

    George16 New Member

    Messages:
    25
    2230 P400 PCB silk screen shows H402, H403, H406 and H408 on left channel while it lists H401, H402(again), H405, H407 on the right channel.

    I believe H402 should be H403 on the right channel and H403 should be H404 on the left channel. Can someone substantiate my findings? I'm in the process of replacing the transistors because of a weak and crackling left channel that multiple cleaning of pots and switches with deoxit didn't fix.

    H401, H402, H405 and H406 were PNPs replaced with KSA 992s.
    H403, H404, H407 and H408 were NPNs replaced with KSC1845.

    I haven't tested the receiver after replacement of the transistors.

    This is on a 2230 with serial number U720635.
     
  11. coltran

    coltran New Member

    Messages:
    1
    hello,

    I am French, my marantz 18 a glass cleared, I've looked everywhere but I have not found even.
    Who can help me?
    Thank you in advance.

    Best Regards,
    Patrick

    I use a translator, thank you for your understanding.
     
  12. patfont

    patfont AK Subscriber Subscriber

    Messages:
    2,931
    Location:
    South Jersey
    Yeah I have a P400 board here and the silk screening is mixed up, just replace each transistor with the appropriate replacement and you will be fine.







     
  13. George16

    George16 New Member

    Messages:
    25
    Success!!! :banana: The new transistors cleared the weak and crackling left channel.
     
  14. rBuckner

    rBuckner Luv 2 Restore Subscriber

    Messages:
    8,774
    Location:
    Prescott, Arizona
    2330B schematic error P800 assy

    There is a connection shown that simply cannot be there. It is from the common cathode side of dual rectifier Q818 going up to the left side of R809 and that is postive rectified raw dc voltage. That trace wouldn't survive long!
     
  15. adpopulum

    adpopulum Well-Known Member

    Messages:
    789
    Location:
    Toronto, ON
    2215 p900 phono board errors

    On my phono board (p900) (the board is YD2821008-0) the silkscreening indicating polarity for C901, 902, 909 & 910 is wrong (SM parts layout is correct however except for C902). Negative poles for these caps should all be facing toward the center of the board.
     
  16. special_20

    special_20 Member

    Messages:
    75
    Location:
    Minneapolis
    marantz 2220 manual error

    pre-amp board

    C503/504 Silk screen and manual show wrong orientation

    Inventory has wrong value
    Manual: 4.7 uf 35 v
    From factory: 4.7 uf 50v
     
  17. stevo1214

    stevo1214 Active Member

    Messages:
    235
    Location:
    So Cal
    2252B P700 board errors

    The C701 marking on the P700 board is reversed, and also the R776 is supposed to be Q754. The same error as the 2238B.
     
  18. 2275Joe

    2275Joe New Member

    Messages:
    11
    Location:
    Bernried, Bavaria, Germany
    Marantz 2275: Component PM 300 Service Manual error

    When recapping the MPX PM 300 component of a 2275 today, I found a "C342" electrolyte capacitor mounted on the original PM 300 circuit board, with 10 uF/16 V, and the designation of "C342" and the plus position clearly printed out on the board. The SM I have does not mention a C342 electrolyte cap, but shows only the positions of two "C340", and "C339" (film) capacitors, instead.

    Joe
     
  19. mcsew2k

    mcsew2k Active Member

    Messages:
    498
    Location:
    California
    While looking for a mod I could do to enable tape-to-tape copy on the 2270, I noticed a small matter of a missing dot in the schematic near the tape jacks.

    I have attached a self-explaining diagram.

    David
     

    Attached Files:

  20. invalidbuffa

    invalidbuffa Audio tinkerer

    Messages:
    1,171
    Location:
    Oregon
    3200

    In the schematic, the two non-polar electrolytic caps in the output side of the tone board are shown as 1uF/50v, but on the board itself and in the parts list they are 4.7uF/16v.
     

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