Brother International HL-2600CN Service Manual - Page 307
Is D4 Error cleared
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Error Code Name of Part D4 Developer Clutch 2 (DCLK) Confirm the connection of Connector. Is the connection proper between ECN13 of IOD2 and Clutch (DCLK) ? NO Is the harness of Clutch (DCLK) broken ? YES Connect the harness. Connect the connector properly. Is D4 Error cleared ? NO YES Complete Check the voltage at DCLK ON-N. Does the voltage drop ( Does the voltage jump ( +24V) between ECN13-3 and ECN2-6? YES NO ) between ECN1-4 and ECN2-12 ? YES NO Replace current MCTL PWB 2 with a new PWB. Is D4 Error cleared ? NO YES Complete Replace the clutch (DCLK) with a new clutch. Replace IOD2 PWB 2 with a new IOD2 PWB 2. Is D4 Error cleared ? YES NO Complete Re-check MCTL IOD2 12CN ECN1 ECN13 4 DCL(K)ON-P 4 1 +24V-1 Developer Clutch 2 (K) DCL(K)ON-P 3 DCLK ECN2 +24V-1 3 PGND 6 SGND 8