2285BD,,,,,, again .

Discussion in 'Marantz Audio' started by David Heath, Feb 5, 2019.

  1. David Heath

    David Heath New Member

    Messages:
    6
    Hello , all . I am new to this forum ,site , and Vintage AUDIO. I bought a new 2285B receiver ect not long after I graduated High School in 1976. I got one of the first production units as I had it before the end of the first semester , of Jr College. But back in now a d my son bought me a somewhat_ Functioing 2270 for Christmas. THE 2270 is a completely different story , but while I was waiting on parts for it, I decided to look for a 2285B . On Ebay , what I wound up with is a 2285BD. It is Nice , really nice ! CLEAN , tone boards , phono boards , Amp Perfect!! BUT the AM radio , Fm 25us , had problems,,and the stereo Lamp was inop. After a fairly intense internet search & checking with Marantz.com I realized that no easily accessibly site had service manuals or schematics for it , the 2285BD. After a quick look at Vintage Audio Site forums , I was like like most of the opinions posted and assumed that it was a close knockoff to and I would be able to use a 2285B and take care oF it.
    HOW WRONG ALL OF US ARE!!!!!!!!!
    I was grateful to find and obtain access to Audiokarma.org!! After downloading service manuals of all the equipment manufactured between.1975 and 1985 The closest boards and amps are the 2330B . The AM / FMBoards for all that era are close , probably the same basic components for the 4 IC dual receiver single boards . BUT LAYOUT, LABELING, AND AMOUNT OF FILTERING ARE DIFFERENT AS PRICE AND POWER OUT INCREASE. If anyone has the right service manual , and or schematic PLEASE HELP!!!!
     

     

    Please register to disable this ad.

  2. wlhd1610

    wlhd1610 Penny and her new friend Sponsor Subscriber

    Messages:
    2,792
    Location:
    Catskill NY
    Hi David and welcome to AK!

    I have found that the 2285B P200 board has 2 or 3 major variations from the schematic along with it's associated wiring to the front panel boards and switches..

    All is not lost though because several of the variations are exactly the same as the P200 board in the 2330B schematic.

    You just have to cross compare them.

    Post a few pics of your board if you can.

    Bob
     
    nj pheonix likes this.
  3. David Heath

    David Heath New Member

    Messages:
    6
    Wilco when I am back there . IT IS LAID OUT LIKE THE 2330B but the labeling definately isnt the same. There is No J001 or J007 quad out jack on the chassis. I will need to add one for digital decode access ?
     
  4. David Heath

    David Heath New Member

    Messages:
    6
  5. David Heath

    David Heath New Member

    Messages:
    6
    Sorry it took so long. HAVE BEEN BUSY AND AWAY and wood was back on when I made initial post. Thanks for the help
     
  6. David Heath

    David Heath New Member

    Messages:
    6
    Without measuring power / voltage to finals, ect and just listening based on what I remember about my original 2285B , and how this amp sounds at quarter volume and a slither higher , I am guessing this amp is built with more power out that a 2285B ? If anyone know the published rating for a 2285BD , Im definately interested ?
     

     

    Please register to disable this ad.

  7. bryans12v

    bryans12v Marantz Junkie Subscriber

    Messages:
    1,410
    Location:
    Hudson Valley, NY

    Same power and THD as the other 2285 models.
     
  8. paul_ral

    paul_ral Active Member

    Messages:
    264
    It has dolby decoder FM receptacle on the back panel?
     
  9. David Heath

    David Heath New Member

    Messages:
    6
    yes Paul, It does have the dolby plugin receptacle and The Transformer Primary selectable plug. There is NO FM Quad detector jack either. . Thanks for everyone's help. also BRYAN 12V ,,, IS THAT A FACT
    FOR THE AMP SPECS OR AN ,assumption ,, OR GUESS? Since I don't have access too any valid data to that unit,, I am relying on you good people who do. Thanks again
     
  10. paul_ral

    paul_ral Active Member

    Messages:
    264
    I think D came from the factory with a DLB-1 (Dolby FM Decoder).
     
    catrafter likes this.

Share This Page