Marshall 5210

Discussion in 'Marshall Amps' started by Marcomel79, May 3, 2021.

  1. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
    Hello guys, first post here. I have a Marshall 5210 from 1988. Does anybody have any experience with this amp? Basically the gain knob form 1 til 8 is pretty much useless. How can i fix this? It would be so nice to have a good crunch on this amp without having to set the gain on 9 and use my guitar volume on 2/3 if i want a bit less distorsion. Any help would be greatly appreciated.
     
  2. fitz288

    fitz288 Well-Known Yinzer Gold Supporting Member

    Joined:
    Apr 7, 2020
    Messages:
    4,107
    Likes Received:
    10,499
    Location:
    the Burgh
    :welcome: to the forum.
    At 33 years old, it might just be a dirty pot that's not getting good contact.
    Try some Deoxit or similar electronics cleaner/lube.
     
    GIBSON67 likes this.
  3. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
    I have tried to do that without any result... it just kind of has a muddy sound until 9 when it turns into a high distorsion... i dont know anything about amps, can it be one of the components thats gone bad?
     
  4. fitz288

    fitz288 Well-Known Yinzer Gold Supporting Member

    Joined:
    Apr 7, 2020
    Messages:
    4,107
    Likes Received:
    10,499
    Location:
    the Burgh
    Hard to diagnose from a distance.
    If your not into tearing apart your amp, perhaps a trip to a service tech would be the thing to do.
    You can find local Marshall repair with this link.
    Check "Service Center" instead of "Retailer" and enter your location.

    Recommended Retailers - marshall.com
     
    Springfield Scooter likes this.
  5. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
    I live in Norway so you dont get the same service you get in the States... and if you do, its pretty expensive.
     
  6. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
    EAB6BEA4-9137-44D3-86FC-245BCBDE3EE1.jpeg
     

    Attached Files:

  7. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
    This is what the inside looks like plus the gain pot. Everything looks clean. No bad solder joints or rust or anything tjat would indicate malfunctioning
     
  8. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
     
    fitz288 likes this.
  9. fitz288

    fitz288 Well-Known Yinzer Gold Supporting Member

    Joined:
    Apr 7, 2020
    Messages:
    4,107
    Likes Received:
    10,499
    Location:
    the Burgh
    Sorry I can't help further.
    I don't have any experience with that amp.
    Perhaps someone smarter than me will chime in.
    If you are comfortable with a soldering iron, you could try installing a new gain pot, but I don't know if that's the problem.
     
    Marcomel79 likes this.
  10. wakjob

    wakjob Well-Known Member

    Joined:
    Dec 29, 2011
    Messages:
    5,670
    Likes Received:
    4,182
    Location:
    C-137
    Could you further explain "useless" in regards to the Gain control?
    What is it doing? ... or not doing?
     
  11. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
    Basically it has a muddy clean/somewhat slightly distorted sound til about 8/9 and all of a sudden when turned up to 9/10 the good distorsion shows up, but then its like a metal type distorsion. I can manage to dial a good tone through the guitar since i rewired it 50's style. Otherwise before 8/9 theres no definition in the sound, no crunch at all. Have to get whatever sound i want through the volume and tone of my guitar. Also noticed that when i turn the gain knob to zero i get no sound, not sure its normal... i can use a soldering iron so i could swap the gain pot if thats the problem, but i feel its more in other components..or maybe thats just the way the amp is...
     
    Last edited: May 4, 2021
    fitz288 likes this.
  12. Marcomel79

    Marcomel79 Well-Known Member

    Joined:
    May 3, 2021
    Messages:
    579
    Likes Received:
    719
    Location:
    Oslo
    Hi, me again. Basically in a normal amp you would work the gain up from slightly dirty, to crunch and finally high distorsion when on 10. On mine however, theres no crunch at all. From 1 til about 6/7 i get some sort of muddy clean/barely overdriven sound and only at about the end of the run i get a distorsion. But no crunch. I changed the pot to see if tjat was the problem but it didnt help at all. Could it be the preamp transistors? I dont really know a lot about schematics so any help would be very mich appreciated.

    il try to attach the schematic of the amp
     

    Attached Files:

    Last edited: Jun 7, 2021

Share This Page