Hey there,
i just found an old post within the Lab about a damaged bias coil within a roland re 201 echo. I am currently repairing a 301 and i have solved a lot of things (like not working chorus, s on s, reverb) but my erasing head isn't working properly. it always leaves something on the tape.
from the shematics i dont get how to check the 70v at 60khz to see if the head gets enough voltage. unfortunately i don't have my scope around.
anyone any suggestions? i messured the resistance of the coil (incircuit) and it gives me something like 4,5ohm and 0,5ohm (almost 9:1) which is okay i guess?
would appreciate any help
i just found an old post within the Lab about a damaged bias coil within a roland re 201 echo. I am currently repairing a 301 and i have solved a lot of things (like not working chorus, s on s, reverb) but my erasing head isn't working properly. it always leaves something on the tape.
from the shematics i dont get how to check the 70v at 60khz to see if the head gets enough voltage. unfortunately i don't have my scope around.
anyone any suggestions? i messured the resistance of the coil (incircuit) and it gives me something like 4,5ohm and 0,5ohm (almost 9:1) which is okay i guess?
would appreciate any help