Brother International HL-2400C Service Manual - Page 263
Is the connection between ECN14 of IOD2 and Clutch DCLC OK ?
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Error Code Name of Part D3 Developer Clutch (DCLC) Check the Connector. Is the connection between ECN14 of IOD2 and Clutch (DCLC) OK ? NO Is the harness of Clutch (DCLC) broken ? YES Connect the harness. Connect the connector properly. Is D3 Error cleared ? YES NO Finished VIII-18 Check the voltage at DCLC ON-N. Does the voltage drop( Does the voltage jump( +24V)between ECN14-3 and ECN2-8? YES NO )between ECN1-3 and ECN2-12 ? YES NO Replace current MCTL PCB with a new one. Is D3 Error cleared ? NO YES Finished Replace the clutch (DCLC) with a new clutch. Replace IOD2 PCB with a new one. YES Is D3 Error cleared ? NO Finished Re-check from beginning of section. MCTL IOD2 12CN ECN1 ECN14 3 DCL(Y)ON-P 3 1 3 +24V-1 DCL(C)ON-P DCLC ECN2 +24V-1 5 PGND 8 SGND 12