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  1. Replies
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    easy way is to replace the board. Ive done a fair...

    easy way is to replace the board. Ive done a fair few and every time i try and repair the board it never works well
    i get the board from marshall uk.
  2. Thank you. But all of these are what i have. The...

    Thank you. But all of these are what i have. The schematics are not on these manuals for the L1 Mk 2 and one is the Links is for L1 but the wrong version
    many thanks
    BBB
  3. Bose L1 version/model 2 schematic needed

    This is the version 2 with 2 psu's with their own amps
    I have the service manual but it don't come with the maps
    many thanks
    BBB
  4. energy 12ND400 PWD PA speaker designed by energy in Italy

    Just a long shot
    does anyone have a map for this. or any other Energy powered speaker speaker

    many thanks

    BBB
  5. Replies
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    682

    Yes G1 I checked that. that's ok. I have pulled...

    Yes G1 I checked that. that's ok. I have pulled the semi conductors out the board from that area, can't find anything
  6. Replies
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    682

    Carver PX1450 one channel down

    Hello all

    this one is starting to try my patience a bit

    It came in for protection mode on one channel. while i was testing about. I found a short across a 26.4k resistor R371
    I removed the...
  7. Well in the uk its slightly different we have to...

    Well in the uk its slightly different we have to keep it for 3 months from ready date then i can legally dispose of. We can charge storage, but have inform when they dropped off.

    I don't really...
  8. Replies
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    926

    I quoted the customer a price on a new board and...

    I quoted the customer a price on a new board and he refused it went back to him . It was working just sometimes took 10 sec to come on and when on no issues
  9. Well the marshall ones i get are Tube amp doctor ...

    Well the marshall ones i get are Tube amp doctor as there is a TAD sticker on them and they have always called the shuguang
    these have failed and the other TAD EL84 i get from my UK supplier have...
  10. Tube Amp Doctor EL84 High failure rate

    Hi all
    Not sure if you lot have been having any problems with the TAD EL84's Forget if its the EL84-STR or EL84-CZ
    In the past 6 months ive have had far to many sets of these and had a fair...
  11. Replies
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    926

    i have asked tech support. told no to map and...

    i have asked tech support. told no to map and only option is to replace the board .
  12. Replies
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    926

    EA Iamp doubler double bass amp

    Hello all

    I have never seen a EA i-amp doubler before does anyone have the map for one of these or had some experience

    I have one of these on the bench reported fault is slow start up. Its a...
  13. Replies
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    269

    gemini GXA750 schematic

    Morning
    Does anyone have a GXA750 map. or know of a similar model I have never seen one

    BBB
  14. Replies
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    sorry fella.. I have checked nowt.. looked online...

    sorry fella.. I have checked nowt.. looked online too for you. and nothing
    bbb
  15. Replies
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    287

    thanks... couldn't see the map on the links ....

    thanks... couldn't see the map on the links . unless i missed it. I'm ok with the components and tracks. But there seems like a possible s/c somewhere. Its a no go really if i don't get the map, not...
  16. Replies
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    287

    boss katana range 50watt

    Hello
    ts a long shot, but does anyone have a map for a katana 50 or even other versions.
    I have one that has had a power surge some where, Burnt bit and tracks on about 4 different parts of the...
  17. Replies
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    763

    morning . Job now done i was being an idiot.....

    morning . Job now done
    i was being an idiot.. its now working correctly. i had not checked all the 470r grid stoppers correctly. there are 2 of them and 2 other 5watt psu resistors under the...
  18. Replies
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    1,179

    Don't know if this will help others but here is...

    Don't know if this will help others but here is the full map

    53446
    good luck
  19. i got about 4 rolls of the stuff when i bought up...

    i got about 4 rolls of the stuff when i bought up stuff from an old firm closed down. Only use it if i ever run out of leaded solder
    so far only for one day in 6 yrs
  20. Replies
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    763

    I would look to nick. But i don't own a car at...

    I would look to nick. But i don't own a car at present. I have no need for one. my workshop is based 2 doors away from where i work.
    Do miss the car on a sunday, fishing or long walk over those...
  21. Replies
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    763

    Hi Nick. I have removed the board at present and...

    Hi Nick. I have removed the board at present and still not back in the chassis. I have removed the bias components . Going to refit them and ad fit a few tinned copper wires to the tracks. as i...
  22. Replies
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    763

    Yes nick. I changed the resistors and caps, one...

    Yes nick. I changed the resistors and caps, one of the first things i did after i changed the tubes out.
    BBB
  23. Replies
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    763

    Just been told by orange that the schematic is...

    Just been told by orange that the schematic is correct. There is only one for this model. It must be a typo mistake.
    I have just removed the board for inspection underneath. all perfect
    The tube...
  24. Replies
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    763

    yes its a bit of a weirdo one . nasty

    yes its a bit of a weirdo one . nasty
  25. Replies
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    763

    well spotted, They are labelled at TP6 and TP7 ...

    well spotted, They are labelled at TP6 and TP7 on the board but i have just seen they are labelled different on the map
    I think its a typo as ive seen spelling mistakes on it
    The test points are...
  26. Replies
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    763

    Orange TH30 with bias issue

    Hello all

    This orange has had me puzzled .
    Came in for sounding bad. Found on the EL84 been gassed. Tested all the pre amp tubes and replaced all the EL84
    Sounded good. On Bias test i found that...
  27. Prima luna Valve pre amp prologue 3

    Hello all

    Just a long shot. Looking for a schematic for this model. I have contact prima luna in the US , Have not had a reply and its been over a week now .

    If anyone has a copy or something...
  28. thanks Nosaj The first thing i did was remove...

    thanks Nosaj
    The first thing i did was remove the usb module that was fitted and i don't have the floppy, about a decade ago i would of had one in my bits draw.
    all voltages on the psu board are...
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