Samsung ML-1665 Service Manual page 4

3.2 Screws used in the printer ............................................. 3-2
3.3 Cover ........................................................................ 3-3
3.3.1 Left/Right cover ...................................................... 3-3
3.3.2 Rear bracket ......................................................... 3-3
3.3.3 Cover-open ......................................................... 3-4
3.3.4 Top/Front cover ...................................................... 3-4
3.4 Main PBA .................................................................. 3-5
3.5 SMPS/HVPS board ...................................................... 3-6
3.6 Fuser unit .................................................................. 3-7
3.7 LSU ........................................................................... 3-8
3.8 Drive unit .................................................................. 3-9
3.9 Step motor .................................................................. 3-10
3.10 Pick up roller ............................................................ 3-11
chapter 4 Alignment and Troubleshooting
4.1 Alignment and Adjustments ............................................. 4-1
4.1.1 Control Panel ......................................................... 4-1
4.1.2 Understanding the LEDs .......................................... 4-2
4.1.3 JAM Removal ...................................................... 4-3
4.1.4 Printing a report ...................................................... 4-5
4.1.5 Periodic Defective Image .......................................... 4-8
4.1.6 Firmware upgrade ................................................... 4-9
4.1.7 Using the smart panel program ................................. 4-10
4.2 Troubleshooting............................................................ 4-12
4.2.1 Procedure of Checking the Symptoms ........................ 4-12
4.2.2 Bad discharge ...................................................... 4-15
4.2.3 Malfunction ............................................................ 4-19
4.2.4 Bad image ............................................................ 4-24
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