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| CONTENTS |
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1. | SPECIFICATIONS | 7 | ||
| 1.1 | Basic System Configuration | 7 | |
| 1.2 | Printer Engine Specifications | 8 | |
| 1.3 | Option Configuration | 9 | |
| 1.4 | Specifications | 10 | |
2. | OPERATION DESCRIPTION | 12 | ||
| 2.1 | Main Control Board | 13 | |
| 2.2 | Engine Control Board (K73 PWB) | 15 | |
| 2.3 | Power Units | 16 | |
| 2.4 | Mechanical Processes | 17 | |
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| 2.4.1 | Electrophotographic process | 18 |
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| 2.4.2 | Paper running process | 22 |
| 2.5 | Sensor | ............................................................................................................................ | 31 |
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| 2.5.1 | Paper related sensors | 31 |
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| 2.5.2 | Other sensors | 32 |
| 2.6 | Color Misalignment Correction | 33 |
2.7Transfer Control Responds to Environmental Changes
| (Room Temperatures and Relative Humidities) | 33 |
2.8 | Paper Jam Detection | 34 |
2.9 | Cover Opening | 35 |
2.10 | Toner Low Detection | 36 |
2.11 | Paper Size Detection | 37 |
2.12 | Operation at | 38 |
| 2.12.1 | 38 |
2.13 | Color Misalignment Detection | 39 |
2.14 | Version Read of Periodically Replaced Units | 40 |
2.15 | Life Counter for Replaceable Units | 40 |
2.16 | Toner Consumption Detection | 40 |
3. PARTS REPLACEMENT | 41 | ||
3.1 | Precautions in Replacing Parts | 41 | |
3.2 | Parts Layout | 43 | |
3.3 | Replacing Parts | 50 | |
| 3.3.1 | Top cover | 51 |
| 3.3.2 LED Assy/ LED Assy spring | 52 | |
| 3.3.3 | Top cover unit | 53 |
3.3.4Control panel Assy/ Control panel bezel/ LED control PWB/ Toner sensor/
| Stack full sensor/ Control panel tape harness/ Eject roller | 54 |
3.3.5 | Top cover handle/ Tope cover latch/ Top cover latch spring | 55 |
3.3.6 | Eject guide Assy | 56 |
3.3.7 | Cassette Assy/ Blind cover/ Side cover R Assy | 57 |
3.3.8 | Feed rollers | 58 |
3.3.9 | Left side cover | 59 |
3.3.10 | 60 | |
3.3.11 | Front cover | 61 |
3.3.12 | Rear cover | 62 |
3.3.13 | Multipurpose tray Assy/ Multipurpose tray cover Assy/ Links/ |
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| Multipurpose tray top cover/ Multipurpose tray drive gear | 63 |
3.3.14 | Drum contact Assys | 64 |
3.3.15 | Registration roller Assy (A)/ Registration drive gear (A) | 65 |
41388601TH Rev.2 | 4 / |