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if you change the head board and the problem still same i think that you have a problem in carriage board or in cable card because if those have a problem like ' short circuit 'be careful because This is reflected directly to the head board it...

thank you sir machine was work good with 4 old heads but now when i replace only yellow head i have this problem also i replace it with another heads but same problem is this problem for main board best regards

wrong head is installed hi all i have prob with Rs 640 printing machine i installed head and i save the serial number " head rank " machine work normal in service menu but in normal service i have error message " wrong head is installed " i update the new firmware 3.9 i inistialise...

hi all i have prob with Rs 640 printing machine i installed head and i save the serial number " head rank " machine work normal in service menu but in normal service i have error message " wrong head is installed " i update the new firmware 3.9 i...

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 37

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 37

in sp 540 the yellow and magenta is in same head you can revese the cables cards between magenta and yellow if the problem move to yellow here you have a problem in cable card you can check it if you repace it with another but if the problem stay in...