Marantz Service Manual error thread

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

  1. MBuras

    MBuras Restoration is an Addiction Subscriber

    Messages:
    441
    Location:
    Champaign, IL
    Marantz 2220B serial number #U353553

    One more for the 2220B. This time on P800 power board. The board diagram and parts list in the service manual show H803 as DS-131B and H804 as DS-132B dual diodes. These positions should actually be reversed, as H803 is DS-132B and H804 is DS-131B. This is also confirmed in the schematic which doesn't list the part numbers but does show the proper positions for these common cathode and common anode dual diodes.
     
  2. Soundork

    Soundork Active Member

    Messages:
    173
    Location:
    Granby, Connecticut
    2220B. On the schematic diagram the polarity of the negative rail filtering capacitor (C004) is reversed.
     
  3. 2pair

    2pair New Member

    Messages:
    1
    On the 2325 schematic it says HE03 and HE04 are HT313272A / 2SC1327ST and HE05 and HE06 are HT107212A / 2SA721ST but HE03 and HE05 are npn transistors while HE04 and HE06 are pnp transistors so the correct data is HE03 and HE05 are HT313272A / 2SC1327ST, HE04 and HE06 are HT107212A / 2SA721ST
     
    wurlyman likes this.
  4. misterguitar

    misterguitar AK Subscriber Subscriber

    Messages:
    259
    Marantz 2245
    R730 and R731 are listed as 47k in parts list, then listed as 47ohms in schematic.
    Check of color bands and resistors on two 2245 phono boards verifies that they are indeed 47 ohms 1/4 watt.
     
    Last edited: Jan 28, 2017
  5. yo00

    yo00 Active Member

    Messages:
    100
    Location:
    Queretaro, Mexico.
    Marantz 2230 schematic error, R755 as per schematic 5.6 kOhms. parts list and pcb shows 3.9 kohms, so right value is 3.9k, as a note, every picture found in the net shows 3.9k


    best regards


    Pio
     
  6. MBuras

    MBuras Restoration is an Addiction Subscriber

    Messages:
    441
    Location:
    Champaign, IL
    Marantz 1122DC service manual errors
    As noted when working on serial #92U080059

    PE01 Tone Control Board:
    CE01/02 - manual says 0.47uf but actually 1uf
    CE13/14/15/16 - manual says 0.033uf but actually 0.018uf
    CE19/20 - manual says 0.47 but actually 0.047uf
    CE29/30 - manual says 0.027uf but actually 0.015uf

    P400 Phono Amp/Selector:
    C403/404 - manual says 10pf but actually 20pf
    C405/406 - manual says 6v/33uf but actually 16v/100uf
    C411/412 - manual says 20pf but actually 10pf

    P700 Main Amp Board:
    C701/702 - manual says film but actually ceramic
    C715/716 - manual says 100v/22uf but actually 35v/22uf
    C717/718 - manual says film but actually ceramic
    C719/720 - manual says film but actually ceramic
    QT01/02 - manual says 2sc945 but actually 2sc735
    QT03/04 - manual says 2sa733 but actually 2sa562
    R727/728/729/730 - manual says quarter watt but actually half watt

    P850 Power Supply Board:
    C853 - manual says 160v/270uf but actually 160v/220uf
    R851 - manual says 100 ohm but actually 47 ohm
     
  7. tranguru

    tranguru Active Member

    Messages:
    122
    Location:
    Brussels
    Hi all,

    I have converted a 4400 service manual to MS-Word. the purpose here is to be able to check with you all if the approach is worth the effort (took me about a 6 hours using an OCR tool and correcting and enhancing the word document after).
    The purpose is to have document which can be enhanced with the corrections (such as the ones in this thread), tips and tricks, ... to the manual. Pictures can be added such as how does an expected signal look on the scope, ....
    The document could enhanced in collaborative mode.

    I did one, but the thinking that we create a team of volunteers who could work on these.
    it took me about 6 hours to get the current result. With the learning and the fact most service manuals are shorter, the exercise should take less time now.
    I am looking for a way to upload the document somewhere - any tips. Can't do it in AK it seems.
    But I can send via email to anyone who is interested.

    Would be great to have your thoughts.

    Robin
     
  8. Ray Gianelli

    Ray Gianelli AK Subscriber Subscriber

    Messages:
    616
    Location:
    Lake Worth, FL
    2330B P800 Power Supply and Protection board

    Q802 is shown with the base and emitter shorted together.

    Q803 is shown with the emitter connected to the base of Q804. It is actually connected through R812, an 18K resistor:

    [​IMG]

    Corrected schematic:
    [​IMG]
     
  9. Raccoon1400

    Raccoon1400 Super Member

    Messages:
    2,550
    Location:
    Ottawa, Canada
    The correction for the bias procedure for the 2245 appears to be missing, it was there before I thought.
    10mV between pins 754 and 760
     
  10. thxdave

    thxdave Lava Lamp repairman Subscriber

    Messages:
    253
    Location:
    Florida
    Isn't this dependent on the serial number of the 2245?
     
  11. Raccoon1400

    Raccoon1400 Super Member

    Messages:
    2,550
    Location:
    Ottawa, Canada
    I don't know, but it applies to the one on the bench now.
     
  12. blhagstrom

    blhagstrom Mad Scientist, fixer. Subscriber

    Messages:
    12,296
    Location:
    Duvall, Washington
    There are 2 types of 2245, early and late and the procedure is different.
    I "think" the only different is which pins to use.
    You want to measure across the emitter resistors, so if you can figure out which pins lead to the resistors, you're golden.
     
  13. thxdave

    thxdave Lava Lamp repairman Subscriber

    Messages:
    253
    Location:
    Florida
    Do you know if there were any SM update bulletins for the 2245? I have one on the bench now in the early stages and I'd love to make sure I do this one right. BTW, I'm thinking mine is late in the production run with serial #32525 but I'm not sure how they did their numbering back then.
     
  14. blhagstrom

    blhagstrom Mad Scientist, fixer. Subscriber

    Messages:
    12,296
    Location:
    Duvall, Washington
    The early ones are engraved face.
    I think the serial numbers were low, like under 5000.

    I don't know of any bulletins.
     
  15. wurlyman

    wurlyman Active Member

    Messages:
    137
    Location:
    Sacramento, CA
    As far as I can see, the board only has 46 resistors. Where do you see R792?
     
  16. wurlyman

    wurlyman Active Member

    Messages:
    137
    Location:
    Sacramento, CA
    On the PL01 component locations drawing for the 2325, the polarity for CL14 (which is on the reverse side of the board) is backwards. I just completed restoring that board today and the actual original board agrees with the schematic but not the component drawing. Had me confused for a while.
     
  17. ringading

    ringading AK Subscriber Subscriber

    Messages:
    523
    Location:
    Auburn, WA
    Not sure if this has been mentioned.

    2220B
    On the P300 MPX Stereo Decoding Board the parts list has C323 and C324 (1uf/35v) as electrolytic but they are tantalum - at least in the unit I have on the bench right now.

    Also it lists C325 as 330uf/35v but the one I pulled out was 220uf/35v.
     
  18. rmorano

    rmorano Active Member

    Messages:
    219
    Hello, on the 2270 bias voltage manual error, I have two 2270s and have adjusted them to 10 mv per the correction, however they seem to have better performance when set to 5 mv. At 5 mv I can achieve more than half volume without issue. At 10 mv I was getting clipping. at 5 its gone.
     
  19. catrafter

    catrafter Marantz Specialist Subscriber

    Messages:
    5,878
    Location:
    Montana
    R791, sorry.
     
  20. Soundork

    Soundork Active Member

    Messages:
    173
    Location:
    Granby, Connecticut
    The procedure with regards adjusting the DC offset is also wrong. Adjust it by measuring the voltages at the speakers output.
     

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