Samsung ML-7300 series Service Manual

Also see for ML-7300 Series: Product guide User guide User guide Service manual Manual Del Usuario

5-3 MalfunctionError status Check Solution1. Check FUSE 1. Replace SMPS.- F1(8A), F2(5A) OPEN. - Refer to “4-12”No Power 2. Check FUSE. 2. Measure the resistance +5V and GND.- F3(250V/3A) OPEN. (Engine board CN5-pin6 and CN5-pin9). If find the short circuit, replacethe Engine board.1. Check Fuser unit To disassemble the Fuser unit,- Thermostat open refer to “4-5”.- hallogen lamp defect 1. If the thermostat of the fuser unitNormal : 110V version - 2~3Ω is opened. replace it.220V version - 5~6Ω2. Check themistor wire assembly defect. 2. If the thermistor wire of the fuser unitInternal Error 11 Normal : 2~400kΩ is defected, replace it.(Fuser Error) 3. Check SMPS 3. If the fuser unit is normal,- CN2 conection on SMPS replace SMPS.- Fuse(F2) open- Defect of component related to Fusercontrol.4. Check Engine Board 4. If not normal operation after replacing- CN7 connection it, replace the engine board.- Fuser control line:Cn5-2 level (Lamp on : 0.2V, Lamp off:24V)Check the Cover Open operation 1. Replace cover open Unit1. Cover open unit defect -Refer to “4-6”Cover open 2. Cable damage and connection 2. Replace cover open switch3. Engine board defect assembly, and connect properly.3. Replace the engine board.Samsung Electronics5-4TroubleshootingDownload Service Manual And Resetter Printer at http://printer1.blogspot.com