in sp 540 the yellow and magenta is in same headHi.I have problem with cyan/black print.There is attachment.Does anybody knows where is problem?
concerning problem with c/b return of main board check the fuses and the transistors C4131 ( NPN) the value between N and N YOU MUST FIND IT 36 OR 37i crossover both cables from CB to MY and problems move from CB to MY.So that is indicators both printheads and printhead cables are good.Problem is somewhere behind.