Marshall MF50DFX

[bsco]

I received the flagship of the low end Marshall Line in for repair and thought I would post my findings.....This was supposed to be cutting in and out but the power is fine.....It turns out that there is a high wattage black resistor which has broken away from the ckt board......which was the cause of no sound......so I soldered the lead back to where it was supposed to go and that was it...apparently this problem happens alot with this particular Marshall line......Also, when installing the nuts on the controls....only put them hand tight....if you tighten them too much you will break the wafers inside the pots...hope this helps somebody out.................
Cheers,
Bernie
P.S. The header should MG and not MF

[gearhead63]

Boy, these manufacturers just keep on building cheaper, junkier products.
Just like the dreaded CRATE amp minimal solder on joints. I've fixed MANY of these
just by adding a little solder to the joints of components. I am really surprised they
do this, especially in combo amps where the pcb/chassis gets all the vibration from the cabinet.
But........I'm not the engineer designing this stuff (who also doesn't have to repair it later),
I'm just the guy who has to locate the problem and correct it.

[bsco]

Boy, these manufacturers just keep on building cheaper, junkier products.
Just like the dreaded CRATE amp minimal solder on joints. I've fixed MANY of these
just by adding a little solder to the joints of components. I am really surprised they
do this, especially in combo amps where the pcb/chassis gets all the vibration from the cabinet.
But........I'm not the engineer designing this stuff (who also doesn't have to repair it later),
I'm just the guy who has to locate the problem and correct it.

I know..I used to wonder why they do stuff like that....use parts that are just barely above the voltage and current in the respective circuit until another tech told me....(".it's junk and there is nothing you can do about it......it keeps me in a job so the hell with it......let them make all the junk they want") so.....after hearing that I tend to take the same attitude.....because there is nothing I can do about it......but it is very sad indeed.....